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Accepting bidstenderUnited States

MIW and SMCM Engineering Support - SEAPORT

Issued by DEPT OF DEFENSE · DEPT OF THE NAVY · NAVSEA · NAVSEA WARFARE CENTER · NAVAL SURFACE WARFARE CENTER · via SAM.gov — US federal contract opportunities

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Published
8 Oct 2026
Closes
10 Nov 2026, 21:00 UTC
Reference
N6133127R0004
Location
United States
Sector
Construction & Infrastructure

At a glance

DEPT OF DEFENSE · DEPT OF THE NAVY · NAVSEA · NAVSEA WARFARE CENTER · NAVAL SURFACE WARFARE CENTER in United States has published a tender in construction & infrastructure: “MIW and SMCM Engineering Support - SEAPORT”. Submissions close on 10 November 2026, 19 days from today. Quote reference N6133127R0004 in any correspondence with the buyer. FreeTender has recorded 35 notices from this buyer since 2026, 3 of them currently open. There are 350 open construction & infrastructure notices in United States on FreeTender. Bids are submitted to the buyer through SAM.gov — US federal contract opportunities, not through FreeTender.

Details

DEPT OF DEFENSE · DEPT OF THE NAVY · NAVSEA · NAVSEA WARFARE CENTER · NAVAL SURFACE WARFARE CENTER is soliciting MIW and SMCM Engineering Support - SEAPORT. Solicitation number N6133127R0004. Classified under NAICS 541330 — Engineering Services. Product/service code R425 — ENGINEERING AND TECHNICAL SERVICES. Responses are due by 10 November 2026 21:00 UTC. Posted on SAM.gov, the US federal contract opportunities system; registration is required to bid.

Solicitation N6133127R0004 for Mine Warfare (MIW) and Surface Mine Countermeasures (SMCM) Design Agent (DA), Technical Direction Agent (TDA), In-Service Engineering Agent (ISEA), and Foreign Military Sales (FMS) Support. THIS IS A SEAPORT SMALL BUSINESS SET ASIDE. THIS SOLICITATION IS ONLY OPEN TO SEAPORT MAC HOLDERS. This solicitation will close at 1500 CST on 10 November 2026. Sources Sought Reference ID: N61331-26-SN-Q28

Context for bidders

We hold 35 notices from DEPT OF DEFENSE · DEPT OF THE NAVY · NAVSEA · NAVSEA WARFARE CENTER · NAVAL SURFACE WARFARE CENTER, going back to August 2026 — 3 of them still open. They buy mostly in Electronics semiconductors, Manufacturing & Supply and IT & Telecom. There are 350 open Construction & Infrastructure tenders in United States. This one closes in 19 days.

Before you bid on this tender

A quick checklist to help you decide whether to bid and prepare a compliant submission for this construction & infrastructure opportunity. Always verify the details on the official source.

  • Confirm the exact closing date and time (and time zone) on the official portal — deadlines are strict and can be revised by a corrigendum.
  • Read the full notice and every attached document, including the scope, specifications and any bill of quantities or terms of reference.
  • Check the eligibility criteria — prior similar experience, annual turnover, certifications and registrations — and make sure you qualify before investing effort.
  • Prepare any earnest-money deposit (EMD) or bid security and the required formats early; missing or wrongly-formatted documents are a common cause of rejection.
  • Note how bids must be submitted (online or physical), in what format, and whether a digital signature or portal registration is required.
  • Watch for corrigenda and clarifications right up to the deadline — requirements and dates can change.
Common bidding mistakes to avoid →Writing a winning proposal

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