FreeTender
Accepting bidstenderUnited States

Navy Shore Sustainment Support (N3S) — Modification of Equipment- Communication, Detection, and Coherent Radiation Equipment

Issued by DEPT OF DEFENSE · DEPT OF THE NAVY · SPAWAR · SPAWAR LANT · NIWC ATLANTIC · via SAM.gov — US federal contract opportunities

Verify & apply on the official portal →
Published
9 Nov 2026
Closes
7 Dec 2026, 20:00 UTC
Reference
N6523627R0007
Location
United States
Sector
Construction & Infrastructure

At a glance

DEPT OF DEFENSE · DEPT OF THE NAVY · SPAWAR · SPAWAR LANT · NIWC ATLANTIC in United States has published a tender in construction & infrastructure: “Navy Shore Sustainment Support (N3S) — Modification of Equipment- Communication, Detection, and Coherent Radiation Equipment”. Submissions close on 7 December 2026, 28 days from today. Quote reference N6523627R0007 in any correspondence with the buyer. FreeTender has recorded 5 notices from this buyer since 2026, 1 of them currently open. There are 383 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.

Key requirements

Taken from the notice by FreeTender. The tender document on the official portal is binding — check it, and any corrigendum, before you bid.

To bid on SAM.gov (US federal)

You need an active SAM.gov entity registration with a Unique Entity ID (UEI) to be awarded a federal contract. Check the set-aside and NAICS size standard before you respond.

Details

DEPT OF DEFENSE · DEPT OF THE NAVY · SPAWAR · SPAWAR LANT · NIWC ATLANTIC is soliciting Navy Shore Sustainment Support (N3S) — Modification of Equipment- Communication, Detection, and Coherent Radiation Equipment. Solicitation number N6523627R0007. Classified under NAICS 541330 — Engineering Services. Product/service code K058 — MODIFICATION OF EQUIPMENT- COMMUNICATION, DETECTION, AND COHERENT RADIATION EQUIPMENT. Responses are due by 07 December 2026 20:00 UTC. Posted on SAM.gov, the US federal contract opportunities system; registration is required to bid.

*This RFP was originally drafted with the document identifier of N6523626RE088. Due to system limitations, the document identifier changed to N6523627R0007 to reflect the document s FY27 release. An amendment will be forthcoming to update any reference to the original document identifier.* ** This opportunity is for SeaPort-NxG MAC HOLDERS ONLY.** No other offers will be considered. SeaPort-NxG MAC holders will need to register for PIEE accounts in order to receive solicitations and submit proposals/offers. Naval Information Warfare Center Atlantic (NIWC Atlantic) Charleston, SC requires Navy Shore Sustainment Support (N3S) for the Engineering Services and Cyber Authorization (ESCA) Integrated Product Team (IPT). The contractors will be tasked to accomplish the work as specified in the Performance Work Statement (PWS). The PWS and Contract Data Requirements List (CDRL) include Controlled Unclassified Information (CUI) and will not be made publicly available. In order to obtain access to the PWS and CDRL, the offeror shall download, complete, and submit a Non-Disclosure Agreement (NDA) for each individual requiring access to the non-public documents to jessica.k.glisson.civ@us.navy.mil. Questions are due to jessica.k.glisson.civ@us.navy.mil by 12:00 pm Eastern Standard Time on 20 November 2026.

Context for bidders

We hold 5 notices from DEPT OF DEFENSE · DEPT OF THE NAVY · SPAWAR · SPAWAR LANT · NIWC ATLANTIC, going back to September 2026 — 1 of them still open. They buy mostly in Research, Studies & Evaluation and Construction & Infrastructure. There are 383 open Construction & Infrastructure tenders in United States. This one closes in 28 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

More Construction & Infrastructure tenders

All Construction & Infrastructure tenders →

FreeTender mirrors this notice for reference. Verify the details and bid on the official portal.

Verify & apply on the official portal →