Diana McWilliams President and CEO

Diana McWilliams

President and CEO

Diana became CEO of the Affordable Housing Accreditation Board in January 2017. She has over 25 years of management experience helping transform public and non profit organizations to work more effectively for the people and communities they serve. Her leadership experience includes working on accreditation from the service provider side, with accrediting bodies of the National Children’s Alliance, Council on Accreditation, and the National Association for the Education of Young Children. Diana served for two terms as a state representative in Delaware, and as behavioral health commissioner for the State of New Mexico. In the commissioner role, accreditation played a crucial part in funding decisions, and assessing the quality of the provider network. Diana’s unique experience, such as her membership on the executive team that expanded Medicaid for the State of New Mexico, has enabled her to have a strong understanding of all areas of managing organizations receiving public funding. She has led organizations through the accreditation process, established quality assurance programs, led re-accreditation teams, and been on the receiving end of accreditation. Just prior to running AHAB, Diana ran the largest emergency shelter in the City of Philadelphia serving homeless families, and provided 80 units of transitional and permanent supportive housing funded by the City of Philadelphia and HUD in scattered sites throughout West Philadelphia.

Diana is a graduate of George Mason University and holds a master’s degree in Public Administration from the University of Delaware where she was a Legislative Fellow for the Delaware House of Representatives and Executive Fellow for former Governor Carper, now US Senator. She is committed to helping affordable housing organizations of all types and sizes with implementing best practices, giving a platform to innovative strategies, and assisting them with being assets to their communities.

Coy Maienza Director of Accreditation

Coy Maienza

Director of Accreditation

Coy brings over two decades of experience in program evaluation and quality assurance to the Affordable Housing Accreditation Board. Her knowledge of housing and residential programs, and the accompanying supportive services has enabled her to help organizations become more effective and reduce waste while saving money and retaining key staff. Her experiences include working in behavioral health for over 15 years, working as both direct services staff and management in multiple settings including residential treatment centers. During these years a large part of her job was to ensure compliance with both the accrediting bodies and government funders. She worked for eight years for the State of New Mexico in program evaluation for domestic violence services and substance abuse prevention services. This included working with nonprofit agencies of all types and sizes, from those serving rural and frontier communities to those serving inner cities, each with their own unique strengths and challenges. Throughout Coy’s work as an evaluator and in direct service provision, she has worked with national accreditation standards and developed correspondence as part of program evaluation with COA and the Joint Commission.

Coy earned a Master’s degree in Counseling Psychology from Naropa University, and a Bachelors degree in Psychology from New Mexico State University.

Dr. Sabine Eustache Evaluation Consultant

Dr. Sabine Eustache

Evaluation Consultant

Sabine has over 18 years of public health management and consulting experience. Sabine started a successful public health consulting firm in 2004 focused on ensuring access to affordable, evidence-based healthcare systems and public health programs. As a consultant, she provided organizational development, program planning and evaluation services to numerous nonprofit, healthcare, government and academic organizations. Sabine has worked with a number of academic institutions and health care organizations to achieve accreditation. She has helped convene accreditation teams, authored self-study reports and prepared supporting materials required for a site visit. Sabine currently serves as a Site Visitor for the Council on Education for Public Health.

Sabine earned her Master’s and doctorate degrees in Public Health from Drexel University and a Master of Business Administration from Eastern University.

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