All Other Professional, Scientific, and Technical Services — NAICS 541990
Browse federal contract opportunities classified under NAICS code 541990 (All Other Professional, Scientific, and Technical Services). Find active solicitations on SAM.gov, understand size standards, and discover set-aside opportunities for your business.
About NAICS 541990
All Other Professional, Scientific, and Technical Services. This industry falls under the Professional, Scientific, and Technical Services sector (NAICS codes beginning with 54).
Federal agencies use NAICS code 541990 when posting contract opportunities on SAM.gov to classify the type of work being solicited. Businesses that operate in the all other professional, scientific, and technical services space should include this code in their SAM.gov registration and capability statements to ensure they appear in relevant searches.
How to Use NAICS 541990 in Federal Contracting
To compete for federal contracts under NAICS 541990, your business should be registered in SAM.gov with this NAICS code listed in your entity profile. When agencies post solicitations for all other professional, scientific, and technical services work, they reference this code to determine the applicable small business size standard and any set-aside eligibility.
If you hold certifications such as 8(a), HUBZone, SDVOSB, or WOSB, you may be eligible for set-aside contracts under this NAICS code. These set-asides limit competition to certified small businesses, giving you a significant advantage in winning federal work.
FedOverwatch monitors SAM.gov daily and can automatically match you with new opportunities under NAICS 541990. Set up your profile with your NAICS codes and certifications to receive personalized contract alerts.
NAICS 541990 Market Intelligence
Based on 3 years of federal award data from USAspending.gov, the all other professional, scientific, and technical services market has seen 29,494 contract awards totaling $39.0B in value. The median contract size is $142K, with approximately 819 new awards per month.
Total Awards (3yr)
29,494
Total Value
$39.0B
Median Contract
$142K
Competitors
4,345
Contract value distribution
15,041 small business awards ($7.4B total value,$109K median)
4,345 companies compete for NAICS 541990 contracts
See who's winning, their award values, and where you fit in the market
Explore CompetitorsSize Standards
The SBA establishes size standards for each NAICS code to define what qualifies as a "small business" for federal contracting purposes. For NAICS 541990 (All Other Professional, Scientific, and Technical Services), the size standard is based on either average annual receipts or number of employees, depending on the specific industry. Meeting the size standard for your primary NAICS code is required to qualify for small business set-aside contracts.
Visit the SBA Size Standards Table to find the current threshold for NAICS 541990.
Recent NAICS 541990 Opportunities
View all →The Department of Defense is procuring innovative commercial solutions and technologies through the SAF/CDM Commercial Solutions Opening (CSO) for Defense-Related Activities. This initiative allows for the competitive selection of solutions that address mission requirements and capability gaps, with an open period for white paper submissions until September 1, 2026.
The Federal Communications Commission (FCC) is procuring Enterprise Cybersecurity and Monitoring Services for the Universal Service Administrative Company (USAC). Proposals are due by June 10, 2026, and the RFP provides detailed instructions for submission.
The Department of Defense is procuring the EMS Decision Aid Product Tool IV (EDAPT-IV), which is a software as a service solution for professional, scientific, and technical services. The tool will be utilized at Patrick Space Force Base in Florida.
The procurement is for professional support services in the Atlantic Area of Responsibility. The services are intended for federal agencies operating in this region, focusing on enhancing operational capabilities and support.
The General Services Administration is contracting for integrated services through the OASIS+ program, specifically targeting HUBZone small businesses. This continuously open solicitation aims to provide a flexible and efficient procurement solution for a variety of services, with an emphasis on supporting historically underutilized business zones.
The General Services Administration is procuring services under a Multiple Award Schedule program. This program allows for the acquisition of a variety of commercial products and services to meet federal agency needs efficiently and effectively.
The Department of Defense is procuring commercial and economic research and innovation services. The key requirements include the ability to conduct comprehensive research and provide innovative solutions to enhance economic performance and competitiveness.
The General Services Administration is contracting for integrated services through the One Acquisition Solution for Integrated Services Plus (OASIS+) SDVOSB Set-Aside Continuously Open Solicitation. The key requirements include being a Service-Disabled Veteran-Owned Small Business.
The Department of Defense is procuring evaluation services for the fire suppression system at Building 126 located at the Watervliet Arsenal in Watervliet, NY. The key requirements include assessing the current fire suppression capabilities and providing recommendations for improvements.
The Department of Defense is procuring technology development, deployment, and program support through the Golden Dome for America Commercial Solutions Opening (CSO). This initiative aims to protect Americans and critical infrastructure from advanced weapons threats by leveraging commercial innovation and allowing for flexible contracting. Vendors will be selected based on the merit of their solutions to enhance military effectiveness.
Frequently Asked Questions
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