NAICS 541620 · Professional, Scientific, and Technical Services

Environmental Consulting Services

15,875 contractors list NAICS 541620 (Environmental Consulting Services) in SAM.gov; 9,896 are small under its SBA size standard and 3,395 list it as their primary NAICS.

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Search with filters Small businesses only

Contractors (all registrations): 15,875
Small under 541620SBA size standard for this code: 9,896
Primary NAICSTheir main line of business: 3,395
Related industriesCodes these firms also list: 8

Work this industry

Live RFPs in this NAICS
Open SAM.gov solicitations coded 541620, matched to teaming partners.
Expiring awards
Incumbent contracts in 541620 heading to recompete in the next 18 months.
Small under 541620
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 541620

Claimed profiles come first by membership level, then companies with 541620 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

Including excluded, expired and inactive SAM.gov registrations (flagged in the list). Excluded entities cannot receive federal awards or subcontracts. Hide them

Showing 1–20 of 15,875 contractors

WASHINGTON RIVER PROTECTION SOLUTIONS LLC
UEICQE8EF6LB317CAGE4UWU0
Location: RICHLAND, WA
Primary NAICSNot listed as small under 541620
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: $10.6B ($10,560,504,772)
RESEARCH TRIANGLE INSTITUTE
DBA RTI INTERNATIONAL
UEIJJHCMK4NT5N3CAGE3A730
Location: DURHAM, NC
Primary NAICSNot listed as small under 541620
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: $2.6B ($2,577,609,608)
EASTERN RESEARCH GROUP INC
DBA ERG, INC
UEIDK4TBEJRAR56CAGE00GP8
Location: CONCORD, MASocio-economic status (SAM.gov): SB
Primary NAICSNot listed as small under 541620
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: $616.4M ($616,450,000)
WSP USA INC
UEIC76NUJZDXL75CAGE1U1W9
Location: Ephrata, PA
Primary NAICSNot listed as small under 541620
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: $536.8M ($536,815,400)
TETRA TECH, INC.
DBA TETRA TECH
UEIFL1UPMZCC5S8CAGE6X204
Location: PITTSBURGH, PA
Primary NAICSNot listed as small under 541620
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: $222.5M ($222,527,707)
TETRA TECH INC
DBA TETRA TECH
UEIHVDMNK1MYQN3CAGE4DHV4
Location: VIRGINIA BEACH, VA
Primary NAICSNot listed as small under 541620
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: $202.8M ($202,807,887)
TETRA TECH, INC.
DBA TETRA TECH
UEIE3QKBMJ7H9K7CAGE0YEM5
Location: CHICAGO, IL
Primary NAICSNot listed as small under 541620
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: $182.4M ($182,405,929)
TETRA TECH INC
UEIHW1GWDNW1F21CAGE3CVA2
Location: SAN DIEGO, CA
Primary NAICSNot listed as small under 541620
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: $175.8M ($175,801,827)
S C & A INC
UEIFD83JSMSL9K1CAGE0ZTK2
Location: ARLINGTON, VASocio-economic status (SAM.gov): SB
Primary NAICSSmall under 541620
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: $147.3M ($147,347,608)
NATIONAL RURAL WATER ASSOCIATION
UEIFHNNYNLC22N3CAGE3UUJ5
Location: DUNCAN, OK
Primary NAICSNot listed as small under 541620
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 expiringObligated, 36 mo: $135.8M ($135,796,626)
CDM INTERNATIONAL INC
UEIFYKKBQELE9F5CAGE3EE42
Location: BOSTON, MA
Primary NAICSNot listed as small under 541620
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: $128.2M ($128,160,919)
CHENEGA RELIABLE SERVICES LLC
UEIE6E1RHGUYLL6CAGE807K4
Location: SAN ANTONIO, TXSocio-economic status (SAM.gov): SBSDB8(a)ANC
Primary NAICSNot listed as small under 541620
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: $120.5M ($120,497,754)
GSI NORTH AMERICA INC
UEIEHM2NWLJHSJ7CAGE74P10
Location: FLEMINGTON, NJSocio-economic status (SAM.gov): SBSDB
Primary NAICSNot listed as small under 541620
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: $86.5M ($86,541,450)
TETRA TECH, INC.
DBA TETRA TECH EM INC
UEIJ8CNBANBZ6U8CAGE1HWF1
Location: OAKLAND, CA
Primary NAICSNot listed as small under 541620
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: $83.3M ($83,302,812)
GRYPHON ENVIRONMENTAL, LLC
UEILLZKJ9N8GB18CAGE4LHG7
Location: COLORADO SPRINGS, COSocio-economic status (SAM.gov): SBVOSBSDVOSB
Primary NAICSSmall under 541620
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: $79.4M ($79,411,152)
WESTON - ER FEDERAL SERVICES, LLC
UEIGXFSUP4AZMN4CAGE8BW48
Location: WEST CHESTER, PA
Primary NAICSNot listed as small under 541620
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: $73.8M ($73,849,489)
ONEIDA ENVIRONMENTAL, LLC
UEIFKSYFWA3HXW4CAGE9HCM5
Location: MILWAUKEE, WISocio-economic status (SAM.gov): SBSDB8(a)Tribal
Primary NAICSSmall under 541620
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: $64.1M ($64,083,578)
LEISNOI DIVERSIFIED SERVICES, LLC
UEIG951D1PWEEA5CAGE7S4V8
Location: SAINT IGNATIUS, MTSocio-economic status (SAM.gov): SBSDB8(a)HUBZoneANC
Primary NAICSSmall under 541620
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: $58.4M ($58,413,709)
HGS ENGINEERING INC
UEIKMQMRUAJ6JK9CAGE1HJH9
Location: ANNISTON, ALSocio-economic status (SAM.gov): SBVOSBSDVOSB
Primary NAICSSmall under 541620
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: $57.3M ($57,311,630)
ECO & ASSOCIATES, INC.
UEIM84HCG8KLS98CAGE3YER3
Location: SANTA ANA, CASocio-economic status (SAM.gov): SBWOSB
Primary NAICSSmall under 541620
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: $57.2M ($57,182,140)

Contractors listing NAICS 541620, page 1 of 794
Company	This code	Compliance	SAM.gov	Obligated, 36 mo
WASHINGTON RIVER PROTECTION SOLUTIONS LLC UEICQE8EF6LB317CAGE4UWU0 Location: RICHLAND, WA	Primary NAICSNot listed as small under 541620	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	$10.6B ($10,560,504,772)
RESEARCH TRIANGLE INSTITUTE DBA RTI INTERNATIONAL UEIJJHCMK4NT5N3CAGE3A730 Location: DURHAM, NC	Primary NAICSNot listed as small under 541620	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	$2.6B ($2,577,609,608)
EASTERN RESEARCH GROUP INC DBA ERG, INC UEIDK4TBEJRAR56CAGE00GP8 Location: CONCORD, MASocio-economic status (SAM.gov): SB	Primary NAICSNot listed as small under 541620	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	$616.4M ($616,450,000)
WSP USA INC UEIC76NUJZDXL75CAGE1U1W9 Location: Ephrata, PA	Primary NAICSNot listed as small under 541620	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	$536.8M ($536,815,400)
TETRA TECH, INC. DBA TETRA TECH UEIFL1UPMZCC5S8CAGE6X204 Location: PITTSBURGH, PA	Primary NAICSNot listed as small under 541620	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	$222.5M ($222,527,707)
TETRA TECH INC DBA TETRA TECH UEIHVDMNK1MYQN3CAGE4DHV4 Location: VIRGINIA BEACH, VA	Primary NAICSNot listed as small under 541620	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	$202.8M ($202,807,887)
TETRA TECH, INC. DBA TETRA TECH UEIE3QKBMJ7H9K7CAGE0YEM5 Location: CHICAGO, IL	Primary NAICSNot listed as small under 541620	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	$182.4M ($182,405,929)
TETRA TECH INC UEIHW1GWDNW1F21CAGE3CVA2 Location: SAN DIEGO, CA	Primary NAICSNot listed as small under 541620	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	$175.8M ($175,801,827)
S C & A INC UEIFD83JSMSL9K1CAGE0ZTK2 Location: ARLINGTON, VASocio-economic status (SAM.gov): SB	Primary NAICSSmall under 541620	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	$147.3M ($147,347,608)
NATIONAL RURAL WATER ASSOCIATION UEIFHNNYNLC22N3CAGE3UUJ5 Location: DUNCAN, OK	Primary NAICSNot listed as small under 541620	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 expiring	$135.8M ($135,796,626)
CDM INTERNATIONAL INC UEIFYKKBQELE9F5CAGE3EE42 Location: BOSTON, MA	Primary NAICSNot listed as small under 541620	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	$128.2M ($128,160,919)
CHENEGA RELIABLE SERVICES LLC UEIE6E1RHGUYLL6CAGE807K4 Location: SAN ANTONIO, TXSocio-economic status (SAM.gov): SBSDB8(a)ANC	Primary NAICSNot listed as small under 541620	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	$120.5M ($120,497,754)
GSI NORTH AMERICA INC UEIEHM2NWLJHSJ7CAGE74P10 Location: FLEMINGTON, NJSocio-economic status (SAM.gov): SBSDB	Primary NAICSNot listed as small under 541620	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	$86.5M ($86,541,450)
TETRA TECH, INC. DBA TETRA TECH EM INC UEIJ8CNBANBZ6U8CAGE1HWF1 Location: OAKLAND, CA	Primary NAICSNot listed as small under 541620	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	$83.3M ($83,302,812)
GRYPHON ENVIRONMENTAL, LLC UEILLZKJ9N8GB18CAGE4LHG7 Location: COLORADO SPRINGS, COSocio-economic status (SAM.gov): SBVOSBSDVOSB	Primary NAICSSmall under 541620	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	$79.4M ($79,411,152)
WESTON - ER FEDERAL SERVICES, LLC UEIGXFSUP4AZMN4CAGE8BW48 Location: WEST CHESTER, PA	Primary NAICSNot listed as small under 541620	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	$73.8M ($73,849,489)
ONEIDA ENVIRONMENTAL, LLC UEIFKSYFWA3HXW4CAGE9HCM5 Location: MILWAUKEE, WISocio-economic status (SAM.gov): SBSDB8(a)Tribal	Primary NAICSSmall under 541620	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	$64.1M ($64,083,578)
LEISNOI DIVERSIFIED SERVICES, LLC UEIG951D1PWEEA5CAGE7S4V8 Location: SAINT IGNATIUS, MTSocio-economic status (SAM.gov): SBSDB8(a)HUBZoneANC	Primary NAICSSmall under 541620	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	$58.4M ($58,413,709)
HGS ENGINEERING INC UEIKMQMRUAJ6JK9CAGE1HJH9 Location: ANNISTON, ALSocio-economic status (SAM.gov): SBVOSBSDVOSB	Primary NAICSSmall under 541620	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	$57.3M ($57,311,630)
ECO & ASSOCIATES, INC. UEIM84HCG8KLS98CAGE3YER3 Location: SANTA ANA, CASocio-economic status (SAM.gov): SBWOSB	Primary NAICSSmall under 541620	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	$57.2M ($57,182,140)

Codes these contractors list most often alongside 541620: natural teaming adjacencies.

Environmental Consulting Services

Work this industry

Contractors listing NAICS 541620

Related industries