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The Space Development Agency (SDA) seeks industry proposals for the final of three types of Tranche 2 Transport Layer (T2TL) space vehicles—T2TL Gamma. This program solicitation expands upon the found... The Space Development Agency (SDA) seeks industry proposals for the final of three types of Tranche 2 Transport Layer (T2TL) space vehicles—T2TL Gamma. This program solicitation expands upon the foundation for Tranche 2 of the Proliferated Warfighter Space Architecture (PWSA) previously described in the T2TL Alpha and Beta solicitations. SDA expects to procure approximately 20 T2TL Gamma space vehicles with a payload specifically designed to close future kill chains via the PWSA. The Gamma variant will share certain baseline characteristics with the other T2TL variants (Alpha and Beta) outlined in the solicitation. T2TL features multiple space vehicle and mission configuration variants procured through a multi-solicitation and multi-vendor acquisition approach. The initial launch capability is scheduled for September 2026. The T2 Gamma program solicitation is comprised of unclassified solicitation documents as well as classified material on technical details of payload development. To receive the solicitation’s CUI content, please include your organization’s CAGE code and location in your request. For classified content, please include a JWICS email address in your request. Requests received from organizations that do not possess a facility clearance of at least Secret will be evaluated on a case-by-case basis. SDA will endeavor to respond to all request in the order that they are received. All requests should be provided via email to ussf.pentagon.sda.mbx.sda-ps-24-02@mail.mil no later than April 23, 2024 at 12:00 PM Eastern, with the subject line “SDA T2TL Gamma Solicitation Content Request”. Included in this program solicitation as a CUI document is the DD254 template, which SDA will complete and send along with the classified documents. If you intend on utilizing a subcontractor or partner and sharing SDA’s classified information with them, you will need to fill in a separate version of this template with Block 7 & 8 a-c completed as well. SDA Security will validate the facility information and return a signed version before sending the classified documents. All proposals should be submitted per solicitation instructions no later than April 30, 2024 at 12:00 PM Eastern. Proposals received after the deadline will be considered late and not evaluated. Amendment 1 This amendment changes the Fiscal Year Payment Schedule percentages in Table 3-8 and makes minor formatting changes. (End of Amendment)