| 1 | 1 | UCOR, an Amentum-led partnership with Jacobs
701 Scarboro Road
Oak Ridge, TN 37830
| 865-576-8321
ucor.com
1,842 / NA
| Y
| Y
| Y
| Y
| Y
| Environmental cleanup; radioactive waste management, environmental monitoring and restoration, asset management
| Amentum
Jacobs
Germantown, MD
Dallas, TX
| Ken Rueter
President, CEO
2011
|
| 2 | 5 | GEM Technologies
2033 Castaic Lane
Knoxville, TN 37932
| 865-560-9434
gemtechnologiesinc.com
245 / NA
| | Y
| | | | Services for environmental restoration, decontamination and demolition, waste management
| NA
NA
| Michael Evans
President, CEO
1994
|
| 3 | 3 | Strata-G, LLC
2027 Castaic Lane
Knoxville, TN 37932
| 865-934-3400
stratag.org
240 / 240
| Y
| Y
| Y
| Y
| Y
| ES&H, infrastructure, utilities, nuclear operations, waste management, project management
| NA
NA
| Elliott Barnett
John Patterson
CEO
President
2002
|
| 4 | 4 | Atkins Nuclear Secured
545 Oak Ridge Turnpike
Oak Ridge, TN 37830-7187
| 865-483-8247
atkinsglobal.com/nuclear
234 / 547
| | Y
| Y
| Y
| Y
| Radioactive waste management, nuclear safety, nuclear quality assurance, project management, staff augmentation support services
| SNC-Lavalin
Montreal, QC Canada
| Tom Jouvanis
President
2001
|
| 5 | 2 | North Wind Group
2800 Solway Road
Knoxville, TN 37931
| 865-556-8014
northwindgrp.com
165 / 1,185
| Y
| Y
| Y
| Y
| Y
| NA
| Cook Inlet Region Inc.
Anchorage, AK
| Chris Leichtweis
CEO, president
1997
|
| 6 | 6 | Spectra Tech, Inc.
132 Jefferson Court
Oak Ridge, TN 37830
| 865-483-7210
spectratechinc.com
128 / 185
| Y
| Y
| Y
| Y
| Y
| NA
| NA
NA
| Dr. Loong Yong
President
1995
|
| 7 | 10 | Perma-Fix Environmental Services
1093 Commerce Park Drive, Ste. 300
Oak Ridge, TN 37830
| 865-690-0501
perma-fix.com
111 / 374
| | Y
| Y
| | Y
| Nuclear/radioactive waste management
| Perma-Fix Environmental Services
Atlanta, GA
| Mark Duff
President, CEO
1990
|
| 8 | 7 | SES Group of Companies
1006 Floyd Culler Court
Oak Ridge, TN 37830
| 865-481-7837
specproenv.com
100 / 375
| | | Y
| Y
| Y
| Design-build construction; a broad range of environmental services; DoD fuel systems construction, maintenance, repair
| Bristol Bay Native Corp.
Anchorage, AK
| Basil Skelton
President, CEO
1992
|
| 9 | 8 | Wood Environment & Infrastructure Solutions, Inc.
2030 Falling Waters Road, Ste. 300
Knoxville, TN 37922
| 865-671-6774
woodplc.com
92 / NA
| Y
| Y
| Y
| Y
| Y
| Environmental investigation, remedial design and implementation, water, permitting, mitigation
| Wood PLC
Aberdeen Scotland
| Edwin Watkins
Operations manager
1972
|
| 10 | 11 | S&ME Inc.
1413 Topside Road
Louisville, TN 37777
| 865-970-0003
smeinc.com
91 / 1,100
| | | Y
| Y
| Y
| NA
| S&ME Inc.
Raleigh, NC
| Elizabeth Porter
Michael Stomer
Eric Solt
Rob Sanders
Leira Douthat
Ken Barry
Brad Salsbury
Randal Martin
VP
VP
Environmental Senior Project Manager
Geomatics Group Leader
VP
VP
Senior Project Manager
VP
1988
|
| 11 | 12 | Boston Government Services (BGS)
105 Mitchell Road, Ste. 101
Oak Ridge, TN 37830
| 866-730-7353
bgs-llc.com
81 / 203
| | Y
| Y
| | | Engineering, technology, security firm providing expert solutions for energy/environmental projects; nuclear safety, specialized design engineering, safeguards/security, information/program management, operations support
| NA
NA
| Harry Boston
President
2007
|
| 12 | 9 | Navarro Research and Engineering Inc.
1020 Commerce Park Drive
Oak Ridge, TN 37830
| 865-220-9650
navarro-inc.com
60 / 698
| Y
| Y
| Y
| Y
| Y
| NA
| NA
TN
| Susana Navarro-Valenti
President
1993
|
| 13 | 13 | GEOServices
2561 Willow Point Way
Knoxville, TN 37931
| 865-539-8242
geoservicesllc.com
58 / 136
| Y
| Y
| Y
| Y
| Y
| Construction services, laboratory services
| GEOServices
Knoxville, TN
| Dennis Huckaba
Professional engineer, president
2006
|
| 14 | NR | Barge Design Solutions, Inc.
520 W. Summit Hill Drive, Ste. 1202
Knoxville, TN 37902
| 865-637-2810
bargedesign.com
55 / 449
| | | Y
| Y
| Y
| Barge provides multidisciplinary engineering (civil, transportation, mechanical, electrical, structural, hydrologic/hydraulic, and environmental) and architectural services from pre-concept to completion for a wide variety of public and private projects.
| Barge Design Solutions, Inc.
Nashville, TN
| Casey Tyree
VP, director of projects, site solutions
1972
|
| 15 | 14 | Civil & Environmental Consultants Inc.
2704 Cherokee Farm Way, Ste. 101
Knoxville, TN 37920
| 865-977-9997
cecinc.com
45 / 1,150
| | | Y
| Y
| Y
| Phase I/due diligence; site investigation & remediation; hydrogeology & groundwater modeling; permitting & compliance
| Civil & Environmental Consultants Inc.
Pittsburgh, PA
| James Tomiczek, P.E.
VP, office lead
2014
|
| 16 | 15 | Alliant Corporation
320 N. Cedar Bluff Road, Ste. 200
Knoxville, TN 37923
| 865-934-2222
alliantcorp.com
44 / 53
| | | Y
| Y
| Y
| Energy management, program development and management, geo-environmental, field operations support, waste management
| NA
NA
| Terence Douglas
Greg Galaher
President
Executive VP
2000
|
| 17 | NR | XCEL Engineering Inc.
1066 Commerce Park Drive
Oak Ridge, TN 37830
| 865-481-3200
xceleng.com
40 / 45
| | | Y
| Y
| Y
| NA
| NA
NA
| Joe Zimmerman
Dr. Iqbal Ahmed
President
VP
2003
|
| 18 | 16 | Strata Environmental Services
110 Perimeter Park Road, Ste. E
Knoxville, TN 37922
| 865-539-2077
strataenv.com
30 / 30
| Y
| | Y
| Y
| Y
| Environmental due diligence; environmental outsourcing (air, water, waste, fueling); and environmental management software
| NA
NA
| Charles Ferst
CEO
1992
|
| 19 | 17 | Process Engineering Associates
700 S. Illinois Ave., Ste. A202
Oak Ridge, TN 37830
| 865-220-8722
processengr.com
28 / 55
| | | | | | Chemical process engineering design and process safety services
| NA
NA
| L.H. Boyd Jr.
Managing partner
1996
|
