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Lisa Simeon is Abt Global’s Chief Operations Officer.  In this role, Simeon is establishing a global operations function to cover all aspects of project management. It will include continuous improvement and scalability of Abt’s standards, processes, and digital platforms for project start-up and closeout, workforce planning, risk management, and quality review to achieve strong financial performance and ensure client satisfaction across the company. She will continue to oversee Human Resources and will add responsibility for global security operations and emergency response to her portfolio.

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.

ZeAmma Brathwaite has over 20 years of experience partnering with private organizations and federal agencies to improve access to care and health outcomes for individuals and communities. A certified project management professional, Brathwaite has extensive experience leading multidisciplinary teams in the design, implementation, and evaluation of complex, large-scale transformation efforts using improvement science methods and tools to accelerate change.

Jake Zebell is a technology leader with more than 20 years of experience in federal modernization, enterprise architecture, applied AI, and secure system delivery.

Dr. Michael Plotzke is a senior health economist with expertise in the area of Medicare payment policy, the organization of healthcare providers and quality measurement. His work typically involves the analysis of large datasets such as Medicare claims, assessment and enrollment data. Dr. Plotzke serves as principal investigator for multiple projects with the Centers for Medicare & Medicaid Services.  On the “Home Health Prospective Payment System and Hospice: Analysis Support and Monitoring” project, Dr. Plotzke leads a team of researchers in analyzing trends in Medicare hospice and home health usage and constructing large-scale payment reform options for both benefits.  Dr. Plotzke also leads the “Evaluation of the Medicare Care Choices Model” project that evaluates a new payment model for end-of-life care that is being tested with 141 hospice providers.  This project involves analysis of existing administrative data and collection of new data through surveys of caregivers, surveys of hospice providers and in-depth case studies of hospice providers participating in the model.

Manoj P. Singh is the former chief operating officer and global managing director at Deloitte Touche Tohmatsu, Ltd.  Prior to his mandatory retirement in June 2015, Singh’s responsibilities included leading various Deloitte initiatives, including setting global strategy, directing investments globally, leading areas such as finance, global technology, knowledge management, branding, and guiding country leadership in high-growth markets such as China, India, Africa, Southeast Asia, Mexico and Germany.

Kathleen Flanagan is president and chief executive officer of Abt Global. She assumed the position on October 1, 2009, after a distinguished career working across the broad range of markets and policy areas that reflect the company's business today. Flanagan joined the company in 1983 as a policy analyst in the Health Area. In 1989 she became managing vice president of the company's Labor Economics Research Area, overseeing research on workforce development and income security programs. In the mid-1990s she launched the International Workforce and Education Practice, winning projects from clients including the U.S. Agency for International Development, World Bank and U.S. Department of Labor. In 1998, she launched the company's Housing and Community Revitalization practice and built a team of more than 75 researchers and technical assistance staff working on affordable housing and community development policies at the federal, state and local levels. In 2005, she was named group vice president for social, economic, and health policy.

Jeffrey (Jeff) Leone is a senior growth leader with more than 20 years of experience leading growth teams and managing complex business development functions such as capture, bids and proposals, market intelligence and competitive assessment, pipeline development, and sales analytics.  Leone’s experience cuts across a range of U.S. domestic and international development markets at Abt and at large, global companies.