| 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
| Jennifer Stone
Office 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.
Louisville, TN
| Elizabeth Porter
Randal Martin
Michael Stomer
Eric Solt
Rob Sanders
VP
VP
VP
Environmental senior project manager
Geomatics group leader
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
|
