Search every US federal contract opportunity on SAM.gov, and draft winning RFP responses with AI.

Explore the demo

Solutions

Contract search AI proposal writing Bid / no-bid scoring Buyer & market intelligence Forecast & recompetes Awards & competitors Teaming & partner network State & local contracts Pipeline & CRM

Find Contracts

All contracts Closing soon Recently posted Highest value Buyer Intelligence What’s coming up Who’s winning (awards)8(a) set-asides WOSB set-asides SDVOSB set-asides HUBZone set-asides

Agency opportunities

DoD contracts VA contracts HHS contracts DHS contracts DOE contracts GSA contracts DOT contracts NASA contracts

Tools & Pricing

AI Opportunity Scan Contract Pricing Benchmark Competitor & Incumbent Lookup Company Award Profile GovCon Market Explorer Supplier & Teaming Finder AI Pursuit Analyzer NAICS Code Lookup Set-Aside Eligibility Small Business Size Standard Acquisition Threshold Guide Bid / No-Bid Scorecard Bid ROI Calculator CMMC 2.0 / SPRS Estimator HUBZone Eligibility Checker Plans & pricing

Learn

Market Reports Blog Answers (Q&A)Resources Glossary A–Z Guides Compare tools 2026 data report

Company

About Contact sales Security & trust Careers WinAContract UK BidWriter UK GovCon — AI proposals eSourcing Data Privacy Terms Refunds

Services & network

Bid & capture consulting Registration & certifications GovCon training Supplier network Teaming & partnering Data & API Reports store

WinAContract is built for US government contractors and hosted in the United States. Operated by eSourcing Data Ltd, registered in England and Wales.

© 2026 eSourcing Data Ltd · info@winacontract.com

DoD · NAICS 541990

DoD All Other Professional, Scientific, and Technical Services contracts

14 open Department of Defense opportunities classified under NAICS 541990, live from SAM.gov.

What next? Found opportunities you can win? Start free to bid with AI.

Get email alerts for this search

New contracts matching these filters, straight to your inbox. No account needed.

We’ll only email you about matching contracts. Want instant alerts, saved searches and AI proposals? Start free →

Browse wider: all DoD contracts · all NAICS 541990 contracts · how to win NAICS 541990 contracts

14 opportunities open now

Professional ServicesCombined Synopsis/SolicitationSDVOSB

Vandenberg SFB Tank Inspection

Dept of DefenseAll Other Professional, Scientifi…

Oct 30, 2026

Response deadline

View details Write proposal

Professional ServicesCombined Synopsis/Solicitation8(a)

711th HPW Mission Support Services MAC IDIQ

Dept of Defense Wright Patterson Afb, OhioAll Other Professional, Scientifi…

Oct 22, 2026

Response deadline

View details Write proposal

Professional ServicesCombined Synopsis/SolicitationSmall Business

Combined Synopsis/Solicitation for Commercial Items Agile Professional Services ("APS”) Department of the Army

Dept of Defense Orlando, FloridaAll Other Professional, Scientifi…

Oct 26, 2026

Response deadline

View details Write proposal

Professional ServicesCombined Synopsis/Solicitation8(a) 6 days left

711th HPW Mission Support Services MAC IDIQ

Dept of Defense Wright Patterson Afb, OhioAll Other Professional, Scientifi…

Oct 15, 2026

Response deadline

View details Write proposal

Professional ServicesSources Sought 7 days left

US Army High Altitude Intelligence, Surveillance, and Reconnaissance (HA-ISR) Support

Dept of DefenseAll Other Professional, Scientifi…

Oct 16, 2026

Response deadline

View details Write proposal

Professional ServicesPresolicitationSBP

MARINE RESOURCE TECHNICAL SERVICES THROUGHOUT THE NAVAL FACILITIES ENGINEERING SYSTEMS COMMAND (NAVFAC) PACIFIC AREA OF RESPONSIBILITY

Dept of Defense Jbphh, HawaiiAll Other Professional, Scientifi…

Dec 08, 2026

Response deadline

View details Write proposal

Professional ServicesCombined Synopsis/Solicitation8(a) 6 days left

711th HPW Mission Support Services MAC IDIQ

Dept of Defense Wright Patterson Afb, OhioAll Other Professional, Scientifi…

Oct 15, 2026

Response deadline

View details Write proposal

Professional ServicesCombined Synopsis/SolicitationSDVOSB

Vandenberg SFB Tank Inspection

Dept of DefenseAll Other Professional, Scientifi…

Oct 30, 2026

Response deadline

View details Write proposal

Professional ServicesCombined Synopsis/Solicitation8(a) 6 days left

711th HPW Mission Support Services MAC IDIQ

Dept of Defense Wright Patterson Afb, OhioAll Other Professional, Scientifi…

Oct 15, 2026

Response deadline

View details Write proposal

Professional ServicesSources Sought 4 days left

USACE Enterprise-Wide Trident Services

Dept of Defense Wilmington, North CarolinaAll Other Professional, Scientifi…

Oct 13, 2026

Response deadline

View details Write proposal

Professional ServicesSpecial Notice

ACC-APG Industry Update November 2026: Registration and request for topics

Dept of DefenseAll Other Professional, Scientifi…

Dec 16, 2026

Response deadline

View details Write proposal

Professional ServicesCombined Synopsis/SolicitationSmall Business 5 days left

Combined Synopsis/Solicitation for Commercial Items Agile Professional Services ("APS”) Department of the Army

Dept of Defense Orlando, FloridaAll Other Professional, Scientifi…

Oct 14, 2026

Response deadline

View details Write proposal

Professional ServicesSolicitationNONE

Golden Dome for America Commercial Solutions Opening

Dept of DefenseAll Other Professional, Scientifi…

Apr 02, 2031

Response deadline

View details Write proposal

Professional ServicesSolicitationSmall Business

Evaluate Fire Suppression Bldg. 126 at the Watervliet Arsenal, Watervliet , NY

Dept of Defense Watervliet, New YorkAll Other Professional, Scientifi…

Dec 23, 2026

Response deadline

View details Write proposal