NAICS 541990 · Professional, Scientific, and Technical Services

All Other Professional, Scientific, and Technical Services

39,391 active contractors list NAICS 541990 (All Other Professional, Scientific, and Technical Services) in SAM.gov; 28,009 are small under its SBA size standard and 6,366 list it as their primary NAICS.

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Active contractors: 39,391
Small under 541990SBA size standard for this code: 28,009
Primary NAICSTheir main line of business: 6,366
Hidden registrationsExcluded, expired or inactive: 528

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Live RFPs in this NAICS
Open SAM.gov solicitations coded 541990, matched to teaming partners.
Expiring awards
Incumbent contracts in 541990 heading to recompete in the next 18 months.
Small under 541990
Partners SAM.gov lists as small under this code: the size check a set-aside uses.

Size is NAICS-specific: a firm can be small under one code and other than small under another. Learn more about small business set-asides

Contractors listing NAICS 541990

Claimed profiles come first by membership level, then companies with 541990 as their primary NAICS, then federal obligations over the last 36 months. SPRS shows the highest blind bracket met, never the score. Learn more about blind SPRS brackets

528 registrations hidden because they are excluded, expired or inactive in SAM.gov. Include them

Showing 6,381–6,400 of 39,391 contractors

THE MITRE CORPORATION
DBA MITRE CORP
UEIDMHDNDCPWUD1CAGE7L030
Location: MC LEAN, VA
Secondary NAICSNot listed as small under 541990
CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9).
No compliance data on file
SAM activeObligated, 36 mo: $8B ($8,011,730,674)
QTC MEDICAL SERVICES INC
DBA LEIDOS QTC HEALTH SERVICES
UEIGN8YP96TMPK6CAGE5AR96
Location: SAN ANTONIO, TX
Secondary NAICSNot listed as small under 541990
CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9).
No compliance data on file
SAM activeObligated, 36 mo: $7.8B ($7,791,980,921)
PARSONS GOVERNMENT SERVICES INC.
DBA PARSONS
UEINMBCAG1JBKL7CAGE1BVK6
Location: CENTREVILLE, VA
Secondary NAICSNot listed as small under 541990
CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9).
No compliance data on file
SAM activeObligated, 36 mo: $7.6B ($7,610,138,628)
HII MISSION TECHNOLOGIES CORP
UEIG5H7HWC4L2R5CAGE3BM51
Location: MC LEAN, VA
Secondary NAICSNot listed as small under 541990
CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9).
No compliance data on file
SAM activeObligated, 36 mo: $7.2B ($7,187,515,530)
MANTECH ADVANCED SYSTEMS INTERNATIONAL, INC.
UEIJY2BDT2K58Z6CAGE5N741
Location: HERNDON, VA
Secondary NAICSNot listed as small under 541990
CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9).
No compliance data on file
SAM activeObligated, 36 mo: $6.1B ($6,140,572,180)
OPTUMSERVE HEALTH SERVICES, INC.
UEIG5XXLHZSW8X3CAGE1RTW6
Location: LA CROSSE, WI
Secondary NAICSNot listed as small under 541990
CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9).
No compliance data on file
SAM activeObligated, 36 mo: $6.1B ($6,077,681,716)
GENERAL DYNAMICS INFORMATION TECHNOLOGY, INC.
UEISMNWM6HN79X5CAGE07MU1
Location: FALLS CHURCH, VA
Secondary NAICSNot listed as small under 541990
CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9).
No compliance data on file
SAM activeObligated, 36 mo: $5.8B ($5,839,984,742)
PERATON ENTERPRISE SOLUTIONS LLC
UEIMBSRAWAQ9559CAGE1U305
Location: CHANTILLY, VA
Secondary NAICSNot listed as small under 541990
CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9).
No compliance data on file
SAM activeObligated, 36 mo: $5.8B ($5,824,907,963)
BOOZ ALLEN HAMILTON INC
UEIKHK6E1JW9C15CAGE1D060
Location: TINTON FALLS, NJ
Secondary NAICSNot listed as small under 541990
CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9).
No compliance data on file
SAM activeObligated, 36 mo: $5.5B ($5,473,234,018)
LEIDOS, INC.
UEIMYKLJHTX3MM7CAGE7LQ18
Location: GAITHERSBURG, MD
Secondary NAICSNot listed as small under 541990
CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9).
No compliance data on file
SAM activeObligated, 36 mo: $5.4B ($5,360,209,895)
KBR WYLE SERVICES, LLC
UEIL693MQDFLKD1CAGE9N030
Location: LEXINGTON PARK, MD
Secondary NAICSNot listed as small under 541990
CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9).
No compliance data on file
SAM activeObligated, 36 mo: $5.2B ($5,212,257,495)
LEIDOS, INC.
UEIMDSWM6MB1BH7CAGE52302
Location: RESTON, VA
Secondary NAICSNot listed as small under 541990
CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9).
No compliance data on file
SAM activeObligated, 36 mo: $5.1B ($5,147,813,041)
AMENTUM TECHNOLOGY, INC.
UEIH2RGSKWXKHQ5CAGE07486
Location: TULLAHOMA, TN
Secondary NAICSNot listed as small under 541990
CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9).
No compliance data on file
SAM activeObligated, 36 mo: $5.1B ($5,094,393,868)
LOCKHEED MARTIN CORPORATION
UEINMHFLDYJJ4C5CAGE52088
Location: MANASSAS, VA
Secondary NAICSNot listed as small under 541990
CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9).
No compliance data on file
SAM activeObligated, 36 mo: $5B ($4,976,102,891)
LOCKHEED MARTIN CORPORATION
UEIKDT2YLB34NT6CAGE16331
Location: ORLANDO, FL
Secondary NAICSNot listed as small under 541990
CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9).
No compliance data on file
SAM activeObligated, 36 mo: $4.8B ($4,831,797,838)
PAE GOVERNMENT SERVICES, INC.
UEIJENBF1KKWZ93CAGE00TB2
Location: CHANTILLY, VA
Secondary NAICSNot listed as small under 541990
CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9).
No compliance data on file
SAM activeObligated, 36 mo: $4.6B ($4,614,802,108)
NORTHROP GRUMMAN SYSTEMS CORPORATION
UEIDJUCEANK2KP4CAGE5FVX5
Location: MCLEAN, VA
Secondary NAICSNot listed as small under 541990
CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9).
No compliance data on file
SAM activeObligated, 36 mo: $4.5B ($4,509,963,333)
LEIDOS, INC.
UEIKTMAJCY6JXM3CAGE5UTE0
Location: RESTON, VA
Secondary NAICSNot listed as small under 541990
CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9).
No compliance data on file
SAM activeObligated, 36 mo: $4.5B ($4,501,203,692)
FCN, INC.
UEIJEANDJTZ8HJ3CAGE0WU14
Location: ROCKVILLE, MDSocio-economic status (SAM.gov): SBWOSB
Secondary NAICSNot listed as small under 541990
CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9).
No compliance data on file
SAM activeObligated, 36 mo: $4B ($4,025,903,518)
THE GEO GROUP, INC.
UEIJMLKZZ1NL2Z6CAGE3JMR1
Location: BOCA RATON, FL
Secondary NAICSNot listed as small under 541990
CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9).
No compliance data on file
SAM activeObligated, 36 mo: $3.8B ($3,771,692,532)

Contractors listing NAICS 541990, page 320 of 1970
Company	This code	Compliance	SAM.gov	Obligated, 36 mo
THE MITRE CORPORATION DBA MITRE CORP UEIDMHDNDCPWUD1CAGE7L030 Location: MC LEAN, VA	Secondary NAICSNot listed as small under 541990	CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9). No compliance data on file	SAM active	$8B ($8,011,730,674)
QTC MEDICAL SERVICES INC DBA LEIDOS QTC HEALTH SERVICES UEIGN8YP96TMPK6CAGE5AR96 Location: SAN ANTONIO, TX	Secondary NAICSNot listed as small under 541990	CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9). No compliance data on file	SAM active	$7.8B ($7,791,980,921)
PARSONS GOVERNMENT SERVICES INC. DBA PARSONS UEINMBCAG1JBKL7CAGE1BVK6 Location: CENTREVILLE, VA	Secondary NAICSNot listed as small under 541990	CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9). No compliance data on file	SAM active	$7.6B ($7,610,138,628)
HII MISSION TECHNOLOGIES CORP UEIG5H7HWC4L2R5CAGE3BM51 Location: MC LEAN, VA	Secondary NAICSNot listed as small under 541990	CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9). No compliance data on file	SAM active	$7.2B ($7,187,515,530)
MANTECH ADVANCED SYSTEMS INTERNATIONAL, INC. UEIJY2BDT2K58Z6CAGE5N741 Location: HERNDON, VA	Secondary NAICSNot listed as small under 541990	CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9). No compliance data on file	SAM active	$6.1B ($6,140,572,180)
OPTUMSERVE HEALTH SERVICES, INC. UEIG5XXLHZSW8X3CAGE1RTW6 Location: LA CROSSE, WI	Secondary NAICSNot listed as small under 541990	CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9). No compliance data on file	SAM active	$6.1B ($6,077,681,716)
GENERAL DYNAMICS INFORMATION TECHNOLOGY, INC. UEISMNWM6HN79X5CAGE07MU1 Location: FALLS CHURCH, VA	Secondary NAICSNot listed as small under 541990	CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9). No compliance data on file	SAM active	$5.8B ($5,839,984,742)
PERATON ENTERPRISE SOLUTIONS LLC UEIMBSRAWAQ9559CAGE1U305 Location: CHANTILLY, VA	Secondary NAICSNot listed as small under 541990	CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9). No compliance data on file	SAM active	$5.8B ($5,824,907,963)
BOOZ ALLEN HAMILTON INC UEIKHK6E1JW9C15CAGE1D060 Location: TINTON FALLS, NJ	Secondary NAICSNot listed as small under 541990	CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9). No compliance data on file	SAM active	$5.5B ($5,473,234,018)
LEIDOS, INC. UEIMYKLJHTX3MM7CAGE7LQ18 Location: GAITHERSBURG, MD	Secondary NAICSNot listed as small under 541990	CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9). No compliance data on file	SAM active	$5.4B ($5,360,209,895)
KBR WYLE SERVICES, LLC UEIL693MQDFLKD1CAGE9N030 Location: LEXINGTON PARK, MD	Secondary NAICSNot listed as small under 541990	CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9). No compliance data on file	SAM active	$5.2B ($5,212,257,495)
LEIDOS, INC. UEIMDSWM6MB1BH7CAGE52302 Location: RESTON, VA	Secondary NAICSNot listed as small under 541990	CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9). No compliance data on file	SAM active	$5.1B ($5,147,813,041)
AMENTUM TECHNOLOGY, INC. UEIH2RGSKWXKHQ5CAGE07486 Location: TULLAHOMA, TN	Secondary NAICSNot listed as small under 541990	CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9). No compliance data on file	SAM active	$5.1B ($5,094,393,868)
LOCKHEED MARTIN CORPORATION UEINMHFLDYJJ4C5CAGE52088 Location: MANASSAS, VA	Secondary NAICSNot listed as small under 541990	CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9). No compliance data on file	SAM active	$5B ($4,976,102,891)
LOCKHEED MARTIN CORPORATION UEIKDT2YLB34NT6CAGE16331 Location: ORLANDO, FL	Secondary NAICSNot listed as small under 541990	CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9). No compliance data on file	SAM active	$4.8B ($4,831,797,838)
PAE GOVERNMENT SERVICES, INC. UEIJENBF1KKWZ93CAGE00TB2 Location: CHANTILLY, VA	Secondary NAICSNot listed as small under 541990	CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9). No compliance data on file	SAM active	$4.6B ($4,614,802,108)
NORTHROP GRUMMAN SYSTEMS CORPORATION UEIDJUCEANK2KP4CAGE5FVX5 Location: MCLEAN, VA	Secondary NAICSNot listed as small under 541990	CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9). No compliance data on file	SAM active	$4.5B ($4,509,963,333)
LEIDOS, INC. UEIKTMAJCY6JXM3CAGE5UTE0 Location: RESTON, VA	Secondary NAICSNot listed as small under 541990	CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9). No compliance data on file	SAM active	$4.5B ($4,501,203,692)
FCN, INC. UEIJEANDJTZ8HJ3CAGE0WU14 Location: ROCKVILLE, MDSocio-economic status (SAM.gov): SBWOSB	Secondary NAICSNot listed as small under 541990	CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9). No compliance data on file	SAM active	$4B ($4,025,903,518)
THE GEO GROUP, INC. UEIJMLKZZ1NL2Z6CAGE3JMR1 Location: BOCA RATON, FL	Secondary NAICSNot listed as small under 541990	CMMCNo CMMCSPRSNoneFacility clearance: visible to paid members. Clearance levels are shown only to paying members; TeamingIndex does not advertise clearances (NISPOM 32 CFR 117.9). No compliance data on file	SAM active	$3.8B ($3,771,692,532)

Codes these contractors list most often alongside 541990: natural teaming adjacencies.

All Other Professional, Scientific, and Technical Services

Work this industry

Contractors listing NAICS 541990

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