The Department of Agriculture, specifically the Rural Housing Service, is seeking a Subject Matter Expert (SME) for the Guaranteed Underwriting System (GUS) Business to Government (B2G) Support Services, focusing on Security Application Programming Interface (API). The SME will provide administrative, technical, and operational oversight for API development and implementation, ensuring security and compliance with relevant regulations such as NIST-800-53 Rev 5 and FISMA. This role is critical for maintaining robust and secure interfaces for mortgage-related applications, facilitating seamless integration with financial systems, and optimizing API performance. Interested parties can contact Bridget Purdy at bridget.purdy@usda.gov or Camille Perry at camille.perry@usda.gov for further details, with the contract performance locations including Washington, D.C., and St. Louis, MO.