The Department of Defense, specifically the Department of the Air Force, is conducting a Sources Sought notice for a follow-on Indefinite Delivery Indefinite Quantity (IDIQ) contract focused on engineering services related to Secondary Power Systems (SPS) and Small Gas Turbine Engines (GTE) as part of a Component Improvement Program (CIP). The objective is to identify responsible sources capable of enhancing the safety and reliability of these critical systems, which are vital for military aircraft, through tasks such as system analysis, prototyping, and hardware testing. Interested parties must demonstrate prior experience, access to proprietary data from Original Equipment Manufacturer Pratt & Whitney, and identify their small business status under NAICS code 541330. Responses should be directed to Michelle Manuel at michelle.manuel.3@us.af.mil or Angelina Kellett at angelina.kellett@us.af.mil, with no costs reimbursed for submissions.