From the notice

ENVIRONMENTAL MODELING AND SIMULATION SUPPORT V (EMSS-V) The contractor shall have a Top-Secret Facility Clearance with Secret Safeguarding capability. Additionally, the contractor shall have the ability to provide TS/SCI personnel to conduct the scope outlined in Section 2 at the time of award. This Performance Work Statement (PWS) establishes the requirements for contractor-provided services that will include, but not be limited to technical, programmatic, acquisition, expert panel, analyses, engineering, logistical, and consultation support on a Task Order (TO) basis. The contractor shall meet all requirements and responsibilities in support of AFTAC as identified in this PWS including all subsequent TOs. All support and staff shall be fully trained, professional, and customer oriented to consistently provide responsive, flexible, innovative, and cost-effective support services. This "level of effort" project's primary objective is to perform both operations and maintenance (O&M) and research and development (R&D) tasks that support the EMS Program. The majority, if not all of this work will be done at the Contractor site.