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Sean McClellan, Ph.D. is a mixed-methods researcher with over a decade of experience in full cycle health services research. He has experience managing research projects, developing analytic designs, cleaning and analyzing administrative data, fielding rigorous surveys, conducting qualitative interviews, and communicating findings in plain language.

Harold Poston has more than 25 years of experience in federal IT, with deep subject matter expertise across Health IT modernization, Defense Health Agency programs, and Army enterprise IT transformation. Poston leads Abt’s growth strategy for Military Health and VA, connecting federal clients to Abt’s capabilities in digital transformation, data services, and program modernization.

In his career as a senior finance and operations executive, Rehberger most recently served as the Senior Vice President, Chief Financial Officer of Engility, a Virginia-based government contractor.  He held similar positions with TASC from 2010 until its merger with Engility in 2015.  Rehberger helped guide both companies as the government industry cycled through a severe downturn and recovery, counseling the Board of Directors regarding strategy, enterprise risk management, cyber security, and compensation.  He previously held executive positions with telecommunications firms XO Communications and MCI. In 2017, Virginia Business awarded Rehberger the Virginia CFO of the Year award for his outstanding commitment to financial stewardship and dedication to the success of Engility.

Graham Teskey leads Abt Global’s Global Governance practice out of Canberra, Australia. He has 40 years of experience in governance and international development. He has worked with (and for) for the U.K.’s Department for International Development, (the forerunner to the Foreign, Commonwealth and Development Office), the World Bank, and Australia’s Department of Foreign Affairs and Trade. Graham has lived and worked in multiple countries, including Kenya, Tanzania, Uganda, Rwanda, Zambia, Zimbabwe, Malawi, Fiji, Vanuatu, Indonesia, Papua New Guinea, Solomon Islands, Philippines, and Timor-Leste.

Geoff Scahill has over 20 years of experience working in and managing international development programs. He has worked extensively within Papua New Guinea (PNG) and the Pacific – predominantly in Indonesia, Fiji, Samoa, and the Solomon Islands. He brings a long history as a health sector professional and has held roles as a health management advisor and health systems adviser in Pacific Island Countries. Geoff draws on his background in finance and economics to work with counterparts to increase efficiencies within the programs Abt Global delivers.

Matt Bugbee is a federal technology executive with almost three decades of experience leading digital modernization, enterprise IT, and business growth initiatives for civilian agencies.

Jessica is a qualified international and community development practitioner with over 25 years of experience working in development in Southeast Asia, the Pacific and Australia. She holds a Bachelor of Asian Studies, Master of International and Community Development and a Graduate Certificate in Gender Policy and Mainstreaming. Jessica’s experience includes working with government, donors, multilaterals, the private sector, managing contractors and NGOs. 

Teresa Mota, BSN, RN is an Associate/Nurse Researcher and a sought-after clinical researcher on federal and state projects emphasizing aging, long-term care, and improving the care experience. Mota has an extensive clinical and health services research background in geriatric nursing, and she specializes in post-acute care, quality improvement (QI) and supporting community-based providers and stakeholders to assist them in the identification of best-practices, develop resources and tools, communications, and implementation of QI initiatives. Mota also participates in data collection, measurement, analysis, and reporting related to these programs.