How to Get on the Navy SeaPort-NxG Contract Vehicle

To get on the Navy SeaPort-NxG contract vehicle, your firm needs an active SAM.gov registration, a Unique Entity Identifier, and a proposal submitted during one of the Navy’s rolling admissions windows, which are announced on SAM.gov with no fixed schedule. The proposal itself is short: a five-page Technical Capability Statement built around one functional area, plus a completed and signed Standard Form 33. Everything is filed electronically through the SeaPort portal, and starting April 1, 2026, through the Procurement Integrated Enterprise Environment (PIEE) instead.

What You Are Applying For

SeaPort-NxG is the Department of the Navy’s centralized buying vehicle for professional support services across engineering and program management. Winning here means winning a master indefinite-delivery/indefinite-quantity contract, which is a license to compete, not a guarantee of work. Every dollar of actual revenue comes from individual task orders posted later by one of roughly 121 ordering offices inside NAVAIR, NAVFAC, NAVSEA, NAVSUP, NAVWAR, ONR, the Military Sealift Command, and the U.S. Marine Corps.{¹}

The current master contract runs a five-year base that began January 2019 plus a five-year option that extends through January 2029. Firms admitted through rolling admissions join for the remainder of that period. As of early 2025, about 2,400 contractors held master contracts, with more than a thousand additional firms coming in through the most recent cycle.

Eligibility Before You Apply

SAM.gov Registration and UEI

Every firm that participates has to keep an active registration in the System for Award Management. SAM issues the Unique Entity Identifier that replaced the legacy DUNS number, and the SeaPort portal pulls company data straight from SAM using your UEI and CAGE Code. If your SAM record is expired or incomplete, the portal registration process will stall.{²}

Small or Large Business Status

SeaPort-NxG uses NAICS code 541330 (Engineering Services) with a $47 million revenue-based small business size standard.{³} You must identify accurately whether you qualify, because your designation determines which pool you compete in. Knowingly misrepresenting small business status to win a federal contract can bring fines up to $500,000, up to 10 years’ imprisonment, debarment from federal contracting, and ineligibility for SBA programs for up to three years.{⁴}

Cybersecurity (CMMC)

The Department of Defense began Phase 1 of the Cybersecurity Maturity Model Certification program in November 2025, running through November 2026, with the focus on Level 1 and Level 2 self-assessments. Contractors handling Federal Contract Information need at least Level 1; those handling Controlled Unclassified Information need Level 2 or higher. The specific level attached to any given task order will be spelled out in that solicitation.{⁵}

Watching for a Rolling Admissions Window

The Navy opens rolling admissions windows periodically rather than on a fixed calendar. Each solicitation is posted on SAM.gov, and monitoring that site is the only reliable way to catch the next one. The most recent window, Rolling Admissions II, was released in April 2024.{¹}

SeaPort-NxG covers professional services only, split between Engineering Support Services and Program Management Support Services, and organized into 23 functional area subcategories. Hardware, commercial product purchases, and work outside those 23 areas cannot be procured through this vehicle.{¹}

The Proposal Package

A rolling admissions proposal has two required pieces.

The Technical Capability Statement is capped at five pages. Inside those five pages you include one to three past performance references describing relevant work no more than 10 years old, focused on a single functional area subcategory. This is not the place to show breadth across all 23 areas. Pick the one where your record is strongest and build the case there.

Standard Form 33 (Solicitation, Offer, and Award) accompanies the technical statement and captures your identifying information, an authorized signature, and agreement to the master contract terms.{⁶} Every block on the form has to be completed accurately, and the named authorized signer has to actually sign and date the offer before you submit.{⁷} Incomplete or incorrectly signed SF 33s routinely get the entire proposal rejected on the spot.

How You Submit

Proposals go in electronically through the SeaPort Vendor Portal today, and through PIEE after April 1, 2026. You log in, upload the Technical Capability Statement and SF 33 in the required format, and apply a final digital signature to lock the submission. The system then sends two confirmation emails when both components have been received. Your registration is not complete until both emails arrive.{²}

The Navy typically evaluates for several months and may come back with clarification requests. Awards are announced by email.

The PIEE Migration Deadline

Anyone chasing or holding a SeaPort-NxG contract needs to move to PIEE before April 1, 2026. After that date, the legacy SeaPort Vendor Portal accepts no new bids, proposals, or help desk tickets. It goes read-only on April 1, 2026, and full decommissioning begins June 30, 2026.{⁸} Before the April deadline, your company needs a PIEE account and an active Proposal Manager role. Miss it and you lose the ability to bid on task orders until the account is stood up on the new platform.

Get Your Accounting System Right Before You Bid

Winning a master contract and being able to perform under it are different problems. Many SeaPort-NxG task orders are cost-type (cost-plus-fixed-fee, for example), which requires an accounting system that meets Defense Contract Audit Agency standards. Unlike some vehicles where system adequacy is reviewed only after selection, SeaPort-NxG may require a compliant system before you can bid on certain task orders at all.

The government’s yardstick is DFARS 252.242-7006, which lists 18 criteria. Among them: segregating direct from indirect costs, tracking costs by individual contract, running a timekeeping system that ties labor to specific projects, excluding unallowable costs from government billings, and being able to calculate indirect rates from the books of account.{⁹} Firms new to cost-type work often underestimate what it takes to stand this up. Do it before you chase task orders, not after.

Obligations Once You Are In

Subcontracting Rules

Large business primes have to subcontract at least 20 percent of obligated dollars to small businesses, measured across the whole contract rather than per task order. Inside that, the Department of Defense sets minimum socioeconomic goals: 5 percent to small disadvantaged businesses, 5 percent to women-owned small businesses, 3 percent to HUBZone firms, and 3 percent to service-disabled veteran-owned small businesses.{¹⁰}

Small business primes face the opposite constraint. Under FAR 52.219-14, a small business cannot pay more than 50 percent of what the government pays it to subcontractors that do not share its small business program status. Work sent to a “similarly situated entity” (a subcontractor with the same small business designation and size eligibility) does not count against the cap.{¹¹} Violating subcontracting limitations carries the same penalties as misrepresenting small business status: fines of at least $500,000 or the excess amount subcontracted, whichever is greater, plus possible imprisonment and debarment.{⁴}

Reporting and Portal Maintenance

All primes, large and small, must report subcontracting data through the SeaPort portal every six months. Large businesses also report through the Electronic Subcontracting Reporting System (ESRS). Small business reports in the portal are used to verify the 50 percent self-performance requirement. Missing these reports can lead to suspended payments or termination for default.

Account holders also have to log in at least once every 30 days. An inactive account stops receiving portal notices, including solicitation releases, award announcements, and modification requests. In a vehicle where every task order is competed and timing is tight, a month of silence means missed opportunities you cannot get back.

1
Naval Sea Systems Command. SeaPort NxG
2
Department of the Navy. SeaPort-NxG Registration Instructions
3
SAM.gov. SeaPort NxG IDIQ MAC Rolling Admissions II
4
Office of the Law Revision Counsel. 15 USC 645 – Penalties and Remedies
5
U.S. Department of Defense CIO. About CMMC
6
General Services Administration. Standard Form 33 – Solicitation, Offer, and Award
7
Office of the Under Secretary of Defense for Acquisition and Sustainment. Instructions for Standard Form 33
8
SeaPort. SeaPort Vendor Portal
9
Acquisition.GOV. DFARS 252.242-7006 Accounting System Administration
10
Navy Gold Coast. SeaPort NxG Brief
11
Acquisition.GOV. FAR 52.219-14 – Limitations on Subcontracting