Jessica Oakes is a civil engineer with 14 years of experience. In her second year out of college, she took an assignment for the U.S. Agency for International Development (USAID) in Afghanistan—a decision that would change her life forever. She served there as an expatriate engineer for nearly four years on two consecutive USAID projects, which focused on improving water, sanitation, energy, transportation, and vertical structures throughout the war-torn country. While in Afghanistan, she initiated a women’s internship program for engineering students enrolled in local universities.

Tetra Tech’s Debra Darby, manager of organics sustainability solutions, has 14 years of organics experience in the solid waste industry. She is a certified composting professional and has garnered a reputation as a leader in her field through her extensive background working with organics and compostable materials and driving product stewardship. In addition to her technical expertise, Debra also has 20 years of experience in marketing and has served as a strategic advisor in the public and private sector.

With more than 35 years of experience in project management, engineering, and infrastructure development, Tim Michael is a director in Tetra Tech’s international infrastructure sector. Tim has led projects through all phases of feasibility, facility, and infrastructure development for the U.S. Agency for International Development (USAID) in South Sudan, Ethiopia, and Afghanistan and for the Millennium Challenge Corporation in Tunisia.

Branko Primetica has more than 20 years of experience as an information technology (IT) executive in process and performance improvement, DevSecOps, technology modernization, and artificial intelligence. Branko has supported multiple U.S. federal agencies with these initiatives, resulting in more than $300 million in cost savings due to integration of emerging technology and consolidation and modernization of redundant IT systems.