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Animal and Plant Health Inspection Service
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APHIS Announces New Plant Protection and Quarantine Deputy Administrator

Dear Stakeholders:

Today I am announcing Dr. Mark Davidson as the new Deputy Administrator for Plant Protection and Quarantine (PPQ), a position he has been acting in since Osama El Lissy retired in January 2022.

Dr. Davidson brings a wealth of knowledge and management expertise to the position, after serving in leadership roles in multiple programs, including as an Associate Administrator in my office since 2019, where not only did he assist me and his fellow Associate Administrators in carrying out the Agency’s day-to-day operations, but he also worked closely with Dr. El Lissy in providing oversight to PPQ issues and programs.

Prior to his time in the Administrator’s office, Dr. Davidson served as the Deputy Administrator for Marketing and Regulatory Programs Business Services. Before that, he spent 19 years with Veterinary Services (VS) in various positions in the field, Fort Collins, CO, and Riverdale, MD. From November 2013 to February 2018, Dr. Davidson served as VS’ Associate Deputy Administrator.

In addition, Dr. Davidson received his D.V.M. and master’s degree in veterinary pathology from Auburn University and his bachelor’s degree in agriculture from Western Kentucky University.

I am confident that Dr. Davidson will continue his dedicated service to protecting agriculture, and I look forward to working with him in his new role safeguarding plant health and facilitating the safe global trade of agricultural products.


Kevin Shea
APHIS Administrator

USDA touches the lives of all Americans each day in so many positive ways. In the Biden-Harris Administration, USDA is transforming America’s food system with a greater focus on more resilient local and regional food production, fairer markets for all producers, ensuring access to safe, healthy and nutritious food in all communities, building new markets and streams of income for farmers and producers using climate smart food and forestry practices, making historic investments in infrastructure and clean energy capabilities in rural America, and committing to equity across the Department by removing systemic barriers and building a workforce more representative of America. To learn more, visit

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