NAICS 541990 and PSC R425 contractors

All Other Professional, Scientific, and Technical Services. SUPPORT- PROFESSIONAL: ENGINEERING/TECHNICAL. Cross-code contractor overlap.

NAICS 541990 + PSC R425

Last updated: April 19, 2026

Visible recipients

Mapped obligations

$43,137,723,310

State overlap

Top recipients

Visible recipients in the NAICS 541990 and PSC R425 overlap

Linquest Corporation

Herndon, VA

Herndon, VA | 249 awards | Top agency Department of Defense | NAICS 541715

$1,736,179,612

Systems Planning And Analysis, Inc.

Alexandria, VA

Alexandria, VA | 238 awards | Top agency Department of Defense | NAICS 541330

$1,177,852,158

Noblis, Inc.

Reston, VA

Reston, VA | 372 awards | Top agency Department of Transportation | NAICS 541330

$1,201,445,576

Credence Management Solutions Limited Liability Company

Mclean, VA

Mclean, VA | 222 awards | Top agency Department of Defense | NAICS 541330

$1,032,035,540

Siemens Government Technologies INC

Arlington, VA

Arlington, VA | 227 awards | Top agency Department of Defense | NAICS 541512

$828,871,946

Axient LLC

Arlington, VA

Arlington, VA | 83 awards | Top agency Department of Defense | NAICS 541330

$1,293,253,336

Macaulay-brown, Inc.

Dayton, OH

Dayton, OH | 5 awards | Top agency General Services Administration | NAICS 541511

$3,926,425

Janus Research Group, LLC

Evans, GA

Evans, GA | 103 awards | Top agency General Services Administration | NAICS 611430

$403,749,573

Akima Systems Engineering LLC

Herndon, VA

Herndon, VA | 233 awards | Top agency Department of Defense | NAICS 541512

$106,536,292

Mantech Srs Technologies, Inc.

Herndon, VA

Herndon, VA | 76 awards | Top agency Department of Defense | NAICS 541330

$655,600,634

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