| 1 | 1 | UCOR, an Amentum-led partnership with Jacobs
701 Scarboro Road
Oak Ridge, TN 37830
| 865-576-8321
ucor.com
1,949 / 1,949
| 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 | 4 | Atkins Nuclear Secured
545 Oak Ridge Turnpike
Oak Ridge, TN 37830-7187
| 865-483-8247
atkinsglobal.com/nuclear
248 / 534
| | Y
| Y
| Y
| Y
| Nuclear Safety, Project Management, Business Support Services, Quality Assurance, Staff Augmentation, Radioactive Waste Management, Decontamination and Decommissioning Services, Training, Engineering Services (Design/Build)
| SNC-Lavalin
Montreal, QC Canada
| Tom Jouvanis
President
2001
|
| 3 | 3 | Strata-G, LLC
2027 Castaic Lane
Knoxville, TN 37932
| 865-934-3400
stratag.org
237 / 255
| Y
| Y
| Y
| Y
| Y
| Utilities, infrastructure, ES&H, nuclear operations, waste management.
| NA
NA
| Elliott Barnett
John Patterson
CEO
President
2002
|
| 4 | 2 | GEM Technologies
2033 Castaic Lane
Knoxville, TN 37932
| 865-560-9434
gemtechnologiesinc.com
236 / NA
| | Y
| Y
| Y
| | Radiological and hazardous decontamination and demolition, waste management, infrastructure support, construction, and professional & technical services,
| NA
NA
| Michael Evans
President, CEO
1994
|
| 5 | 5 | North Wind Group
2800 Solway Road
Knoxville, TN 37931
| 865-556-8014
northwindgrp.com
178 / NA
| 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
125 / 200
| Y
| Y
| Y
| Y
| Y
| NA
| NA
NA
| Dr. Loong Yong
President
1995
|
| 7 | 7 | 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 | 8 | SES Group of Companies
1006 Floyd Culler Court
Oak Ridge, TN 37830
| 865-481-7837
specproenv.com
100 / 535
| | | Y
| Y
| Y
| Design-build and design-bid-build construction; heavy and civil construction; DoD fuel systems construction, maintenance, and repair; and turnkey design-build electrical services within the renewable, industrial, and commercial markets
| Bristol Bay Native Corp.
Anchorage, AK
| Basil Skelton
President, CEO
1992
|
| 9 | 11 | Boston Government Services (BGS)
105 Mitchell Road, Ste. 101
Oak Ridge, TN 37830
| 866-730-7353
bgs-llc.com
89 / 220
| | Y
| Y
| | Y
| Civil Engineering, Atmospheric Dispersion Modelling, Capital Project Management Support, Industrial Safety/Hygiene, Radiation Protection
| NA
NA
| Harry Boston
President
2007
|
| 10 | 10 | S&ME Inc.
1413 Topside Road
Louisville, TN 37777
| 865-970-0003
smeinc.com
76 / 1,128
| Y
| | Y
| Y
| Y
| Geotechnical and Civil Engineering
Environmental
Construction Services
Land Development
Planning
Geomatics
| S&ME Inc.
Raleigh, NC
| Elizabeth Porter
Randal Martin
Leira Douthat
Ken Barry
Michael Stomer
Eric Solt
Rob Sanders
Brad Salsbury
VP
VP
VP
VP
VP
Environmental senior project manager
Geomatics group leader
Senior project manager
1988
|
| 11 | 9 | Wood Environment & Infrastructure Solutions, Inc.
2030 Falling Waters Road, Ste. 300
Knoxville, TN 37922
| 865-671-6774
woodplc.com
58 / 40,000
| Y
| Y
| Y
| Y
| Y
| Environmental investigation, remedial design and implementation, water, permitting, mitigation
| Wood PLC
Aberdeen Scotland
| Edwin Watkins
Operations manager
1972
|
| 11 | 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
|
| 13 | 14 | Barge Design Solutions, Inc.
520 W. Summit Hill Drive, Ste. 1202
Knoxville, TN 37902
| 865-637-2810
bargedesign.com
55 / 397
| | | Y
| Y
| Y
| Multidisciplinary engineering (civil, transportation, mechanical, electrical, structural, hydrologic/hydraulic, and environmental), architectural services, land surveying and geomatics, interior design
| Barge Design Solutions, Inc.
Nashville, TN
| Casey Tyree
VP, director of projects, site solutions
1972
|
| 14 | 16 | Alliant Corporation
320 N. Cedar Bluff Road, Ste. 200
Knoxville, TN 37923
| 865-934-2222
alliantcorp.com
54 / 63
| | | Y
| Y
| Y
| Energy management, engineering, project control and management, estimating,geo-environmental, field operations support, waste management, and information management
| NA
NA
| Terence Douglas
Greg Galaher
President
Executive VP
2000
|
| 15 | 12 | Navarro Research and Engineering Inc.
1020 Commerce Park Drive
Oak Ridge, TN 37830
| 865-220-9650
navarro-inc.com
50 / 500
| Y
| Y
| Y
| Y
| Y
| NA
| NA
TN
| Susana Navarro-Valenti
President
1993
|
| 16 | 15 | Civil & Environmental Consultants Inc.
2704 Cherokee Farm Way, Ste. 101
Knoxville, TN 37920
| 865-977-9997
cecinc.com
48 / 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
|
| 17 | NR | Amentum
105 Mitchell Road, Ste. 200
Oak Ridge, TN 37830
| 865-425-7000
amentum.com
44 / 34,000
| | Y
| Y
| Y
| Y
| NA
| Amentum
Germantown, MD
| Cheryl Cabbil
Robert Sledzik
Richard Giannelli
Paul Gubanc
VP
VP
PE, senior project manager, office manager
PE chief nuclear safety officer
1999
|
| 18 | 17 | XCEL Engineering Inc.
1066 Commerce Park Drive
Oak Ridge, TN 37830
| 865-481-3200
xceleng.com
40 / NA
| | | Y
| Y
| Y
| NA
| NA
NA
| Joe Zimmerman
Dr. Iqbal Ahmed
President
VP
2003
|
| 19 | 18 | 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); management software
| NA
NA
| Charles Ferst
CEO
1992
|
