Request for Proposals for Modeling, Simulation, Engineering, Analysis, and Tactics (MSEAT)
Closed Solicitation Posted
This opportunity was awarded. See the award notice from .
- Solicitation number
- N6133126R3105
- Agency
-
Naval Sea Systems Command
Department of the Navy, Department of Defense
- Responses due
- Set-aside
- Total Small Business
Opportunity facts
- NAICS code
- 541330 Engineering Services
- Place of performance
- 110 Vernon Avepanama City Beach, FL 32407 32407
- Points of contact
Notice details come from SAM.gov. Updated .
About this opportunity
The Department of the Navy Naval Sea Systems Command is seeking proposals for Modeling, Simulation, Engineering, Analysis, and Tactics (MSEAT) services under Seaport NxG Multiple Award Contract number N6133126R3105. This engineering services solicitation was previously announced through a Source Sought Notice on July 11, 2025, and an Advance Planning Notice on November 7, 2025. Proposals must be submitted via the PIEE Solicitation Module by the February 6, 2026 deadline. The evaluation will assess past performance over a five-year period preceding the solicitation release, as clarified in Amendment 0001 issued on January 9, 2026. Additional submission requirements include completion of specialized attachments such as the Labor Rate Workbook and Cost Proposal Spreadsheet, with all documents available within the Seaport NxG announcement portal.
This is a total small business set-aside opportunity, with eligibility restricted exclusively to current Seaport MAC holders. The place of performance is located at 110 Vernon Ave, Panama City Beach, Florida 32407. The solicitation falls under NAICS code 541330 (Engineering Services) and PSC category R425 (Support-Professional: Engineering/Technical). No specific budget ceiling or award value range is disclosed in the announcement. Interested small businesses holding active Seaport NxG MAC status should ensure compliance with all PIEE submission requirements and review the amendment log for all solicitation updates prior to proposal submission.
Notice text
3 versions
Update #3 · Latest ·
***ONLY SEAPORT MAC HOLDERS are eligible for award under this solicitation.*** Request for Proposal (RFP) under the Seaport NxG Multiple Award Contract (MAC), number N6133126R3105 for Modeling, Simulation, Engineering, Analysis, and Tactics (MSEAT). This RFP will also be posted within the Seaport NxG Opportunities Page. This effort has been previously been posted within the Seaport NxG portal under the Opportunities page as the following: Source Sought Notice N61331-25-SN-Q38, dated 7/11/2025 and the follow-up Advance Planning Notice/Pre-Solicitation Notice dated 11/7/2025. Previous references this potential solicitation as number N6133126R3006. *** RESPONSES MUST BE SUBMITTED VIA THE PIEE SOLICITATION MODULE.*** PLEASE UTILIZE THE DOCUMENTS FOUND WITHIN THE SEAPORT NxG ANNOUCEMENT, Opportunity - Modeling, Simulation, Engineering, Analysis, and Tactics (MSEAT) RFP N6133126R3105. Opportunity Type: Other. *** Please refer to the Amendment Log found within the Seaport announcement for updates to the RFP.
Update #2 ·
***ONLY SEAPORT MAC HOLDERS are eligible for award under this solicitation.*** Request for Proposal (RFP) under the Seaport NxG Multiple Award Contract (MAC), number N6133126R3105 for Modeling, Simulation, Engineering, Analysis, and Tactics (MSEAT). This RFP will also be posted within the Seaport NxG Opportunities Page. This effort has been previously been posted within the Seaport NxG portal under the Opportunities page as the following: Source Sought Notice N61331-25-SN-Q38, dated 7/11/2025 and the follow-up Advance Planning Notice/Pre-Solicitation Notice dated 11/7/2025. Previous references this potential solicitation as number N6133126R3006. *** RESPONSES MUST BE SUBMITTED VIA THE PIEE SOLICITATION MODULE.*** PLEASE UTILIZE THE DOCUMENTS FOUND WITHIN THE SEAPORT NxG ANNOUCEMENT, Opportunity - Modeling, Simulation, Engineering, Analysis, and Tactics (MSEAT) RFP N6133126R3105. Opportunity Type: Other. *** PLEASE REFER TO THE AMENDMENT LOG FOUND WITHIN THE SEAPORT ANNOUNCEMENT FOR UPDATES TO THE RFP.****
* Amendment 0001 - 1/9/2026
The purpose of this amendment is to:
1. Incorporate omitted attachments J.11 Labor Rate Workbook and J.12 GFP List to the solicitation in the PIEE Solicitation Module.
2. Amend Section L, paragraph 3.2, to change the past performance evaluation period from three years to five years preceding the release of the solicitation to ensure consistency with the criteria outlined in Section M, Factor 2.
3. Replace Section J Attachment J.4 Cost Summary Format with Attachment J.4 Cost Proposal Spreadsheet.
4. Update verbiage in clauses L-215-H006 Submission of Questions by Offerors--Basic (NAVSEA) (APR2022) and L-216-H0001 Task Order General Information (NAVSEA) (JUL 2023) to support proposal submission in the PIEE Solicitation Module.
5. Update verbiage in Section L, 1.0 Instructions of Offers and Section L, Volume III, 3.3.1 - 3.3.3 to support proposal submission in the PIEE Solicitation Module. 6. Insert Volume IV, 3.4.2 Solicitation Fill-ins to provide additional instructions to offerors.
* Amendment 0002 - 1/21/2026
The purpose of this amendment is to remove obsolete "BLK 4" verbiage from the remarks section of CDRL A010 on Exhibit A - Contract Data Requirements List (CDRL). This language was inadvertently retained from a superseded contract procedure and is no longer required.
Update #1 ·
***ONLY SEAPORT MAC HOLDERS are eligible for award under this solicitation.*** Request for Proposal (RFP) under the Seaport NxG Multiple Award Contract (MAC), number N6133126R3105 for Modeling, Simulation, Engineering, Analysis, and Tactics (MSEAT). This RFP will also be posted within the Seaport NxG Opportunities Page. This effort has been previously been posted within the Seaport NxG portal under the Opportunities page as the following: Source Sought Notice N61331-25-SN-Q38, dated 7/11/2025 and the follow-up Advance Planning Notice/Pre-Solicitation Notice dated 11/7/2025. Previous references this potential solicitation as number N6133126R3006. *** RESPONSES MUST BE SUBMITTED VIA THE PIEE SOLICITATION MODULE.*** PLEASE UTILIZE THE DOCUMENTS FOUND WITHIN THE SEAPORT NxG ANNOUCEMENT, Opportunity - Modeling, Simulation, Engineering, Analysis, and Tactics (MSEAT) RFP N6133126R3105. Opportunity Type: Other. ***
Notice history
| Notice | Type | Posted |
|---|---|---|
| Request for Proposals for Modeling, Simulation, Engineering, Analysis, and Tactics (MSEAT) | Award Notice | |
| This notice | Solicitation |
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