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Chris has more than 20 years' experience with leading international law firms and major corporates across Asia Pacific, the United Kingdom and the United States.

William Tuleu leads strategic growth initiatives across the company's U.S. foreign assistance and domestic portfolios.

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. 

Kevin O’Reilly is Abt’s principal accounting officer and a member of both the Pension and 401(k) Advisory Committees. He oversees financial reporting, global tax compliance, government accounting compliance, retirement services, billing, general accounting, payroll and accounts payable. O’Reilly joined Abt Global from Ropes & Gray, LLP, an $800-million law firm, where he was director of finance. Earlier in his career, O’Reilly spent more than 12 years in progressively more responsible roles at Private Healthcare Systems, Inc. He began as manager of accounting and was vice president and controller before the company was sold. O’Reilly also serves as the chairman of the advisory board at St. Francis Xavier School.

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

Kristin Heck, JD, MBA, has more than 10 years of experience managing and directing technical teams in the development of digital solutions. Ms. Heck designs and oversees the creation and implementation of technology solutions that align to agency and administration goals. In addition, she often works closely with program leadership to set key solution objectives, manage the development and product roadmap, analyze customer feedback, and prioritize feature development.

Mariandrea Chamorro has 20 years of experience managing international development programs. She has provided oversight for the high-quality and compliant execution of large flagship USAID programs while contributing to business development. Chamorro’s areas of expertise include prevention of vector-borne diseases, infectious diseases, maternal and child health, and health systems strengthening. Her clients have included the U.S. Agency for International Development (USAID), the Australian Department of Foreign Affairs and Trade (DFAT), and the UK’s Foreign Commonwealth & Development Office (FCDO). 

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.

Leonard M. Hicks, whose 20+ years of experience in business operations and financial management includes leading large-scale growth and transformation for Lockheed Martin and the Mission Essential Group, is Abt Global’s chief financial officer and a member of the executive management team. He is a proven entrepreneur who brings best-in-class leadership and collaborative approaches to problem solving.