The Defense Threat Reduction Agency (DTRA) is seeking proposals for Advisory and Assistance Services (AAS) to support its Strategic Integration (SI) Directorate. The procurement aims to acquire subject matter expertise to enhance the execution of missions related to Combat Weapons of Mass Destruction (CWMD) and the DTRA Information Resilience Office (IRO). This contract will be structured as a single award Indefinite Delivery Indefinite Quantity (IDIQ) with both Cost-Reimbursement and Firm-Fixed-Price line items, spanning a five-year ordering period, with the formal solicitation expected to be released by December 2024 under RFP number HDTRA1-24-R-0057. Interested parties should prepare to submit documentation regarding their current work with DTRA to assess any potential Organizational Conflicts of Interest, with contract awards anticipated by May 2025. For further inquiries, potential offerors can contact Michelle Etienne at michelle.etienne.civ@mail.mil or Rorri Waters at rorri.d.waters.civ@mail.mil.