Interim Executive Solutions has developed a network of highly accomplished professionals with experience leading both nonprofit and for profit organizations. Our Associates bring general expertise in key areas such as assessing organizational needs, determining and acting on priorities, developing the capacity of staff, communicating with stakeholders, and collaborating with nonprofit boards on vision, strategy and future leadership needs.
In addition, many of our Associates have deeper expertise in particular practice areas such as finance, fund-raising, human capital, systems and operations, technology, public relations, and the law, and they are willing share their knowledge in these areas when needed by others.
Here we highlight just a few of the Associates currently available in our network:
Mark Allan
Mark Allan has a strong record of executive leadership and achievement in management, consulting, and education regarding mission driven nonprofit organizations. He was CEO of a series of four nonprofit community-based health, behavioral health, and social service organizations over a period of 18 years, substantially expanding and strengthening each of them.
Most recently he completed four years as Vice President for Psychiatry at Cambridge Health Alliance, a safety net healthcare system, dramatically improving its financial and operational performance. He built and ran a $500M Medicaid health plan for Boston Medical Center and redesigned, led and grew a health sector MBA program at Boston University. He designed and developed health institutes at Boston University and the Indian School of Business in Chandigarh, India.
He has also acted as a consultant to many organizations, providing assistance in strategic planning, financial and operational improvement, system development, and government relations. Mark brings together a deep set of skills and experiences operating in complex environments, successfully integrating vision, leadership, strategy, interpersonal relations, finances and the drive to create successful on the ground implementation
Mark has an MBA in Health Sector and Nonprofit Management from Boston University, an MSW from the University of North Carolina at Chapel Hill and a BA from Columbia College of Columbia University.
Katie is the founder of Prosper & Bloom, a strategic consulting firm providing leadership coaching for non-profit CEOs, Boards and teams. Katie was the President and CEO of the Community Foundation of Western Massachusetts for 10 years after serving 8 years as Vice President of Philanthropic Services. During her CEO tenure, financial assets and staff size doubled. She led the Foundation through a significant evolution, guiding the Trustees toward a new strategic vision centered on increasing equity and opportunity. Earlier in her career, Katie served 10 years as a member of Amherst College’s Development team and was Director of Annual Giving for WGBY/Public Television. She currently volunteers as a Court Appointed Special Advocate for foster youth and is a member of the Town of Amherst’s Community Preservation Act Committee. Katie holds a B.A. in English from Boston College and a Chartered Advisor in Philanthropy® (CAP®) designation.
Karin Cassel Mitterando
Leading organizations for over two decades, Karin (she/they) possesses a keen understanding of the intersectionality between people and business needs, crucial for driving success. As an interim leader, she adeptly navigates complexities and fosters growth across diverse industries. Karin’s strategic vision and hands-on approach consistently propel teams to achieve amidst evolving landscapes.
By defining and articulating a clear and compelling vision for success, Karin guides organizations through change with resilience and adaptability. Her collaborative style emphasizes communication, empowerment, and accountability; fostering environments where individuals thrive, and teams excel. With expertise in fiscal sustainability, strategic planning, process improvement, and compliance, she champions initiatives that drive results.
Barry Coletti
Barry L. Coletti is an experienced career executive, who now offers Interim Executive services to organizations that are in leadership transition. Barry adds value to organizations via stabilizing the operations and maintaining their strategic mission. Barry is successful in handing off the role to the new executive, as demonstrated by creating highly effective multi-disciplinary, cross functional teams, grounded in transparent communication and trust.
Barry, in his first career, was a licensed and board-certified clinical counselor. He displays a passion for helping people and now helps organizations learn to improve and help themselves move forward. Barry has a depth and breadth of experience over a 30-year career as an executive, (in positions of COO, CEO, Advisor) with exposure to over 25 different organizations, at both the departmental and corporate levels.
Barry is known for revenue cycle improvements, transforming siloed operations into high functioning multi-disciplinary teams and culture transformations. His success as an executive is in his systemic training and ability to understand organizations; their cultures and his belief in listening to and developing the people who work there.
Alison Curry
Alison Curry is a passionate and results-driven ED / CEO with a proven track record of transformative leadership and growth within nonprofit organizations. She leverages a unique blend of experience in marketing, fundraising, development, and advocacy. Alison holds a certificate in Public Advocacy and Nonprofit Leadership from Fordham University, a certificate in Sustainable Business Strategy from Harvard Business School, and is CNED certified as a Nonprofit Executive Director through 2025.
Gary Damon
Dr. Gary Damon, Jr. is the President and Chief Executive Officer of Pressure Point Consulting, LLC, a small boutique consulting firm that supports mission-aligned non-profit organizations. With over 22 years of experience in senior and executive leadership across multiple industries: health and human services, criminal justice, re-entry, public, private, international, higher education, and government. As President and Chief Executive Officer, Gary has provided on-demand, transformational interim or co-director support to many industry-leading organizations that serve under-represented, vulnerable, and at-risk individuals.
Gary has provided onsite technical support and assistance, program leadership coaching and support, and workforce development and training to current clients across multiple states, including Connecticut, Kentucky, Michigan, Pennsylvania, Vermont, and California. Gary also published “Everyday Experiences to Improve Work and Life: Reflection Strategies from a Motivational Leader.”
Gary has earned a reputation for his keen ability with people and performance management skills and for his integrity, character, openness, confidence, and bravery to lead a team toward high performance, high impact, and success.
Lastly, Gary earned a Doctorate of Education in Transformational Leadership from Concordia University, his Master of Arts in Organizational Leadership from Medaille University, and his Bachelor of Arts in Secondary Education (5-12) & English from Niagara University.
Keith Dvorchik is an accomplished leader who has more than 25 years of executive nonprofit leadership experience and is now offering Interim Executive services to organizations that are in leadership transition. Keith served as the CEO of University of Florida Hillel for 15 years, President and CEO of The Jewish Federation of Greater Seattle for 3 years, and CEO of The Roth Family JCC/Jewish Federation of Greater Orlando/Shalom Orlando entities for 7 years.
Keith has worked extensively with various Board of Directors and committees to identify the opportunities and challenges facing the organization. He brings the ability to see the big picture, listen to the board’s goals and objectives during the transition period, and help accomplish them.
Keith is a graduate of The Pennsylvania State University with a BS in Accounting and master’s degree in counseling. Keith and his wife, Alison, have two adult children, Evan and Matthew.
Shelley Feist has a history of growing and stewarding multi-organization partnerships while delivering highly-visible programs and campaigns supported by Federal and private funders.
Shelley’s experience has been on three sides of the nonprofit sector – as a grantmaker (Pew Charitable Trusts); as a grantee (The Partnership for Food Safety Education and the John F. Kennedy Center for the Performing Arts) and in setting Federal funding priorities (US Senate Appropriations).
She recently completed a 14-month assignment as interim executive director of The Conservation Alliance for Seafood Solutions, a global sustainable seafood organization.
She brings curiosity, a focus on mission outcomes, and a commitment to stable and communicative management for nonprofit organizations about to engage in the search for a permanent leader.
Shelley grew up as a farmer’s daughter in central North Dakota. She completed the West Virginia Master Naturalist coursework and enjoys spending time outdoors.
She is a longtime resident of Washington, DC.
Eileen Garcia (she/her) has worked solely in and in support of the nonprofit sector and specializes in organizational development , strategy, and coaching. With twenty years of experience in the nonprofit sector, half of which was spent as an executive director or CEO, she has helped countless leaders navigate challenges and map strategies for sustainability and success utilizing her personal experience, understanding of the sector, and work with a broad array of organizations and leaders in the field. She provides coaching and strategic guidance to help leaders understand and advance equity in service delivery and operations. Her expertise includes nonprofit administration, coalition building, advocacy, media relations, board member engagement, and change management. Eileen is committed to elevating unheard voices and supporting organizations that strive to do good.Ronald Jackson
Ronald Jackson, a seasoned professional with over three decades of experience in the housing and redevelopment sector, has held key roles such as Executive Director/CEO, Deputy Executive Director, and Finance and Administration Director at various agencies and Nonprofits. His expertise in organizational development, individual and community supportive services, and community housing development in quasi-governmental and nonprofit sectors has significantly enhanced the services of these organizations, aligning them with their core mission.
As the Founder, President, and Chief Executive Officer of Orula Consulting, LLC, a company he established in 2022, Ronald Jackson has demonstrated his entrepreneurial acumen and unwavering commitment to organizational development, strategy, community development, and Board relations.
Ronald’s recent experience includes a pivotal role as the interim CEO of the Suffolk Redevelopment and Housing Authority from April 2023 to May 2024, a period marked by a significant leadership transition. His adept leadership skills allowed him to stabilize the agency and pave the way for a new, permanent CEO. Before his departure, Ronald initiated two crucial initiatives: the development of an Asset Repositioning strategic plan to guide redevelopment and client support service activities over the next three to ten years and a comprehensive overhaul of the CEO performance evaluation, transforming it from a static annual exercise to an ongoing, forward-looking, and clarifying process.
Ronald holds a Master of Public Administration from Old Dominion University in Virginia and a Bachelor of Business Administration from the University of Cincinnati. He also has a Master’s Certificate in Organizational Leadership and Strategic Organizational Leadership from Villanova University and a Certified Professional Manager from James Madison University. He is a Certified Executive Coach at the University of Kansas and the Center of Executive Coaching. Ronald’s professional affiliations include the American Society of Public Administrators, the National Association of Housing and Redevelopment Officials, the Florida Nonprofit Alliance, and the Florida Redevelopment Association. Ronald also served in the U.S. Army for six years with an honorable discharge.
Ronald resides with his wife and dogs in Delray Beach, Florida. He likes exploring the outdoors and the U.S. in the family RV. He also enjoys music and dancing from different cultures.
Dr. John Kastan is a seasoned executive in the healthcare, behavioral health, and social services sectors in New York. With extensive experience in leadership roles, he excels in strategic planning, program development, operations transformation, and mergers. At the Jewish Board, a major NYC non-profit serving all New Yorkers, he served as Chief Program Officer, Interim CEO during the COVID-19 pandemic, and Chief Strategy & Innovation Officer. Key positions he has held include Vice President for Behavioral Health at St. Vincent’s Hospital, where he established the World Trade Center Healing Service, post-9/11, providing emotional support services. Other roles include Executive Director of Peninsula Counseling Center, Director of the New York Metro region for a behavioral health managed care company, Corporate Administrator for Psychiatry at St. Luke’s-Roosevelt Hospital, and Assistant Commissioner for Planning & Project Management in NYC’s Department of Mental Health.
Beyond organizational roles, he serves on government advisory groups such as The New York State Behavioral Health Services Advisory Council. Dr. Kastan’s commitment extends to leadership positions on trade association boards, including Board President of the NYS Council for Community Behavioral Healthcare and board member of The National Council. His career reflects creativity, adaptability, and a deep understanding of leadership, management, and strategy, driven by a passion to enhance access to services for those in need.
Donna Lowry
Donna Lowry, MD is an executive/strategist with 30 years of experience in the nonprofit, education, and health care sectors. She has held leadership positions at the University of Pittsburgh, Hope College and Ready for School. Donna has developed a strong reputation around community-wide collaborations that leverage public-private partnerships. As a physician, she has designed outcomes-based programming connecting health and education to community development and been instrumental in raising the funds to bring these programs forward. She has worked tirelessly to develop and implement programming that elevates issues of diversity, inclusion, equity, and access, particularly around children’s rights to quality education and healthcare. As a professional interim, her strategies resulted in a 27% increase in top line revenue and stabilized staffing in a private medical practice during COVID.
In 2021 she formed her consulting practice to advise and coach educational institutions, medical practices and community startups in matters of strategy, program development, collaborations, and funding.
Jeff Matlow
Jeff is a respected and highly experienced business leader with experience that crosses both nonprofit and for profit sectors. He has spent over two decades serving in Executive Committee roles for national non-profit Boards, including holding positions as Treasurer, President and Secretary of various Boards.
In 2022 he assumed the role of Interim CEO for Running USA, the leading trade organization for the $2B running industry. While in that role he transformed the company, both strategically and operationally, setting the company up for rapid growth via enhanced programming, growth-centric partnerships and expanded research capabilities.
Jeff is also a 3x successful entrepreneur. Each of his companies was acquired by a publicly-traded organization and Jeff assumed leadership roles in each instance.
He is currently a highly sought-after executive coach for leaders at Fortune 500 companies, and a business transformation consultant for nonprofit and for-profit organizations.
Erin McPartlin
Erin McPartlin is a seasoned nonprofit consultant with over 25 years of experience in nonprofit management and purpose-driven leadership. As a former Executive Director, she deeply understands the challenges organizations face during leadership transitions and excels at guiding them through these critical periods with stability, continuity, and optimism.
Recognizing the delicate ecosystem within each organization, Erin respects the crucial role that every leader and team member plays in maintaining a healthy dynamic. She is particularly skilled at supporting organizations during vulnerable transitions, working closely with boards and search teams to mitigate risks and ensure smooth transitions.
After 22 years as an Executive Director, Erin transitioned to her role as the founder and principal of Erin McPartlin Consulting LLC, offering advisory and interim support to nonprofit organizations. She holds a degree from Marquette University and remains actively engaged in her community just outside Chicago, where she and her husband are raising their four daughters.
Linda Noonan
Linda Noonan currently works with nonprofits and advocacy organizations at the national, state and local levels as a Board member and active volunteer. She previously served as Executive Director of the Massachusetts Business Alliance for Education (MBAE), where she was responsible for advancing the organization’s mission to ensure a high quality public education to prepare every child in Massachusetts for success in college, career and citizenship. In this role, she has represented the business community on state task forces and advisory councils related to education and economic development. Previously, Linda directed international trade programs at Associated Industries of Massachusetts and also served as State Director for the National Federation of Independent Business.
Linda began her career in government at the U.S. Transportation Systems Center in Cambridge, Massachusetts and subsequently was appointed Assistant Secretary for Economic Affairs for the Commonwealth of Massachusetts. Her civic and volunteer activities include serving on the Westwood School Committee and on the town’s Finance Commission, Permanent Building Committee, and Economic Development Advisory Council. She holds degrees from Cornell University and the University of Chicago.
John O’Hara
John O’Hara has spent his career successfully building and leading a variety of non-profit and for-profit healthcare organizations. He has a proven ability to align board members, managers and staff around rapid organizational transformation, growth, and the continuous improvement of operations and finances. John has an effective collaborative leadership style and a demonstrated ability to build and manage high performing teams through very difficult challenges, including complete turnarounds.
John is an innovator who builds trusting relationships with his colleagues and creates a positive environment for change to achieve an organization’s immediate and longer term objectives. He is a good listener and prides himself on being a supportive leader, coach and mentor. John has been an Executive Vice President of a community hospital, Administrator of a large urban ambulatory care center, CEO of a for-profit multi-specialty cardiovascular practice, the President of a multi-specialty physician enterprise, and the Vice-President of a public, safety net hospital.
He currently serves as a Board Member of a local healthcare organization and volunteers for a number of organizations in his community. John has a BA from Boston College, an MHA from The George Washington University, and a JD from Suffolk University.
Maisie Pollard is a seasoned executive leader with a profound commitment to mission-driven organizations. With a wealth of experience in building and guiding high-performing teams, she has demonstrated excellence in recruiting, retaining, and developing talent to create cultures rooted in authenticity, respect, and clear communication. Her leadership is characterized by a strategic balance of organizational excellence, fiscal responsibility, and a deep investment in mission advancement, particularly within marginalized communities.
During her tenure as Chief Administrative Officer at Beth Israel Deaconess Medical Center, Maisie oversaw the strategic planning, operations, and administration for the Department of Obstetrics and Gynecology. She led a team of 400 employees, managed a $66.5 million budget, and significantly expanded services both locally and internationally. Maisie’s efforts in strategic financial development, programmatic expansion, and high-functioning team management resulted in notable revenue growth and enhanced the organization’s reputation. Her initiatives focused on increasing access to under-resourced populations, including LGBTQ+ communities, undocumented immigrants, and victims of intimate partner violence.
Maisie holds a Master of Public Health in Health Policy and Management from Columbia University and a Bachelor of Arts in International Relations from Georgetown University. Her dedication to continuous professional development, including certifications in interim executive leadership and executive leadership courses, equips her to navigate complex organizational challenges and transitions effectively. As she seeks senior leadership positions in mission-driven non-profits, Maisie’s experience and passion make her an invaluable asset to organizations committed to making a meaningful impact.
Alyson Reed
Alyson Reed is an experienced nonprofit and association executive who is currently working as a freelance consultant, serving a diverse population of clients with a range of projects, including interim executive leadership engagements.
Over a professional career spanning more than three decades, Ms. Reed has developed extensive expertise in all aspects of association and nonprofit management, including governance, strategic planning, operations, fundraising, conference planning, program development, government relations, grassroots mobilization/chapter support, financial oversight, human resources, member recruitment/retention, communications, media relations, publishing, and efforts to enhance DEI.
In 2022, Ms. Reed concluded 14 years of service as Executive Director of the Linguistic Society of America (LSA). Prior to that, Ms. Reed served as the Executive Director of the National Postdoctoral Association, the Maryland Commission for Women, and the National Committee on Pay Equity.
Reuben Romirowsky
Dr. Reuben Romirowsky is the founder of DRR Consulting, having recently retired from a successful 30 year career in executive leadership and as a CEO of several human service agencies on both local and national levels.
Reuben was a CEO of a Jewish Family service agency in MetroWest, NJ, and a Jewish Community Center in Orlando, Florida. Other local agencies where he held senior development and program positions were in New York City, which addressed the issues of eldercare, healthcare, domestic violence, urban poverty and food insecurity.
On a national level, Reuben was the Senior VP of Financial Resource Development for JFNA-the Jewish Federations of North America- overseeing the annual growth of a $ 2 billion system which raised annual funds from 150 local Jewish Federations across the US. In addition, Reuben was the VP for Financial Resource Development at UJA-Federation of NY, the largest local charity in America.
Reuben’s consulting practice specializes in Executive coaching, Strategic planning, Board training and development, and Fund-raising strategy and development. He is passionate about building community through quality programs and services that align with organizational mission. Over the years, Reuben has earned a reputation for building high performance work teams and infusing a culture of innovation within organizational work culture.
Clarissa Russell is a distinguished non-profit executive and businesswoman known for her ability to align organizational missions with strategic outcomes. She excels in collaborating with Boards of Directors to realize their visions while fostering synergy between strategy and operations. She brings innovative business acumen to nonprofit organizations, enhancing financial stability, creating efficiencies, and driving purposeful results.
As an accomplished Executive Director for multiple trade associations and professional societies, she has successfully guided three organizations from financial distress to fiscal solvency. Her expertise encompasses transformative leadership, strategic planning, program development, C-suite engagement, value proposition enhancement, fundraising, comprehensive P&L management, marketing, public relations, and multi-level advocacy.
Recognized by the American Society of Association Executives (ASAE) as a Certified Association Executive, further enhanced her leadership capabilities by completing the Interim Executive Director Academy curriculum. She holds an MBA from Johns Hopkins University and a BS from James Madison University. As an advocate for workplace diversity and inclusion, she obtained a Diversity, Equity, and Inclusion Certification from the University of South Florida.
Tracey Schear
As a seasoned leader, Tracey brings broad-based experience in the fields of social change, education, health and wellness,, human services, organizational transformation, and leadership development. For over thirty years Tracey has led nonprofit, public sector and international organizations, overseeing budgets and investments of up to 62 million dollars. Her hands-on experience as a public sector leader, nonprofit executive, consultant, advisor, and systems coach gives her a unique perspective in her work with organizations in transition.
Tracey has extensive experience in leadership transition, organizational development, change facilitation, board development, strategy and design, and partnership and alliance building, Throughout her years of service, she has partnered with organizations to transform their culture, address structural and systemic inequities, and design strategic actions to create just, fair and inclusive human-centered systems. She holds a Master of Social Work; is a Licensed Clinical Social Worker, Professional Certified Coach, through the International Coach Federation; and is a certified Organizational Relationship Systems Coach.
Laura has held leadership roles in corporate technology, K-12 education, higher education, and the non-profit sector. She now works as a consultant and serves a variety of clients nationally. Laura leans on over 30 years of diverse experiences to guide her clients through a comprehensive gap analysis and the difficult conversations needed to chart a sustainable path forward. She is known for her ability to synthesize large amounts of information quickly, think strategically, and act tactically to advance organization goals quickly without losing sight of how important the connection of people and organizational culture are to the fulfillment of mission.
Laura initially worked for a Fortune 100 company and was responsible for enterprise software, user centered design and testing, and technology research. She then served as Executive Director of an education foundation for nearly 5 years before joining a local school district as a consultant to champion a transformational initiative in partnership with the Superintendent. She later transitioned to a leadership role in higher education and most recently served as Chief Talent Development Officer for a regional non-profit tech council. Laura holds a degree in the Management of Computer Systems and an MBA with a focus on leadership studies and a wide variety of certifications which demonstrate her commitment to life-long learning.
Marci Sternheim is a broadly experienced and deeply knowledgeable consultant, coach, facilitator, and trusted advisor dedicated to the success and effectiveness of nonprofit organizations, foundations, and academic institutions. She works closely with boards of trustees and high-level staff in customized engagements to develop their leadership in governance and management, and to build organizational capacity for greatest mission impact.
Marci’s career traverses philanthropy, nonprofit organizations, and academia. Prior to establishing Sternheim Consulting, she was President of The Dibner Fund, a $100 million family foundation; the Founding Executive Director of The Joseph Slifka Center for Jewish Life at Yale; and Assistant University Secretary at Yale. She has taught at both Yale and Wesleyan, and holds a doctorate from Yale and a BA from Colgate University.
Marci is a certified mediator, a BoardSource-trained governance consultant, and a trained Interim Executive Director. She coaches nonprofit leaders, teaches nonprofit governance and professional practice in a variety of programs, and is a frequent public speaker/conference presenter on topics ranging from contemporary best practices in nonprofit governance to organizational culture to the philanthropic partnership. She has served on a wide variety of nonprofit boards, nationally and locally.
Claudia Zeldin is a partner at Growth for Good and an accomplished professional consultant with 35+ years of nonprofit management and marketing experience. She has a strong expertise in interim executive leadership, strategic planning, fundraising, and communications. Claudia has consulted, coached, trained, and created plans and campaigns for more than 150 nonprofit agencies, for-profit companies, and educational and philanthropic organizations. Since 2029, she has held temporary management positions including Interim Executive Director and Development and Communications Director. Assignments include American Foundation for the Blind, The Bronx Community Foundation, Brooklyn Community Housing and Services, College Access: Research & Action (CARANY), Literacy Inc. (LINC), RSS Center for Ageless Living, Youth Communication, Women in Need (WIN), and others.