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Natalie Matthews has over 15 years of experience in the field of homelessness, with a focus on direct service, system planning, database administration, and technical assistance and implementation (TA). Since joining Abt in 2009, Matthews has served in a variety of roles on its U.S. Department of Housing and Urban Development (HUD) Community Compass TA cooperative agreements. She’s also worked on several locally and U.S. Department of Veterans Affairs (VA)-funded TA projects, as well as research, monitoring and evaluation projects.  She served as the project director for the VA’s Supportive Services for Veteran Families (SSVF) monitoring project, served on the evaluation team for HUD’s first evaluation of rapid re-housing programs for families (2012), and led the evaluation of Hartford Connecticut’s homelessness prevention and rapid re-housing program (2014).

Julia Watson is an economist and health systems specialist with 25 years of experience working on both developed and developing country health systems. She has extensive experience managing people and programs and collaborating with a wide range of partners. Her work focuses on improving health financing systems and strengthening the stewardship role of governments in mixed health systems.

Michael Witt brings more than 33 years of experience as a statistician specializing in survey design and survey data analytics. He has more than 27 years of managing staff at the administrative and project level. Mr. Witt has worked with government clients in fields ranging from energy to healthcare.

Liam Ristow is a mixed methods evaluator with 20+ years of evaluation experience in the areas of K-12 and postsecondary education, services for disconnected youth, and community-level change initiatives addressing health and homelessness. He has extensive experience designing and conducting complex multi-year implementation and outcome evaluations for clients at the federal, state and local levels. Ristow brings particular expertise in design of data collection protocols, qualitative data collection and analysis, and development of relevant, actionable evaluation reports.

Ofonama Archibong is an energy transformation expert with 12 years of experience in infrastructure, energy, and environmental quality in Africa. Ofonama brings a wealth of experience in project management, policy development, and business modeling to the forefront. His skill set encompasses technical advisory, stakeholder management, research, and leadership, making him a versatile asset in driving forward sustainable energy initiatives. He has worked with prestigious organizations including Amazon Energy Limited, TEAM Engineering Limited, the Nigeria Electrification Project implemented by the Rural Electrification Agency and most recently the German Development Cooperation Agency (GIZ).

Dr. Anna Koehle is a senior associate with 20 years of experience working in local, state, and federal child welfare programs and services. Dr. Koehle is a Human Services Board-Certified Practitioner (HS-BCP) and a Certified Clinical Trauma Professional (CCTP). Her evidence-to-practice approach to child welfare technical assistance and innovation has allowed her to contribute to systems improvement across the country. Dr. Koehle has lived experience as a foster and adoptive parent and focuses her work on the needs of Black children and families involved with the child welfare system. Her experience includes federal child welfare technical assistance, state child welfare quality assurance, child welfare contracts and grants administration, and human services nonprofit leadership.

As senior health informatics advisor at Abt, Miquel Sitjar provides technical leadership for comprehensive digital health solutions on projects in 30 countries. Having previously led health informatics on USAID’s Infectious Disease Detection and Surveillance project at ICF, he has crucial expertise expanding capacity and interoperable systems for real-time surveillance and pathogen identification in 22 countries. His extensive background in epidemiological and antimicrobial resistance (AMR) surveillance, as well as medical research, health policy, cybersecurity, and supply chain management in over 30 countries greatly enhances Abt’s global health security approaches.

Peter Saling has 14 years of experience designing, leading, and managing programs to increase incomes through agriculture-based livelihoods. His expertise spans from expanding climate resilient livelihoods to increasing affordable access to financing for catalyzing enterprise growth. Saling has designed climate smart agriculture, economic development, and financial sector strengthening programs in more than a dozen countries across sub-Saharan Africa, southeast Asia, and the Middle East. He has worked with governments, the private sector, cooperatives and associations, and civil society to link agricultural producers and small businesses to markets, while also designing innovations to engage young people in agriculture and increase earning opportunities for smallholder farmers.

Debra Cammer Hines brings nearly three decades of executive experience to her role as chief solutions officer. She has had leadership roles at major consulting firms such as Ernst & Young and PwC and at IBM. She also has U.S. federal government experience from her stint at the Office of Management and Budget early in her career.  Debra has provided consulting services across the public sector – federal, state and local governments, healthcare organizations, and all levels of education (pre-k-12 and higher education). Her work has ranged from global technology services, finance, and housing to cybersecurity transformations, mentoring minority leaders, and environmental, social, and governance (ESG) assessments.