Parsons Brinckerhoff Inc.
Founded in 1885. Major practice areas in energy, environmental and facilities engineering. Over 200 offices worldwide.
http://www.pbworld.com/

Black & Veatch
An engineering construction company using trenchless technology.
http://www.bv.com/

CH2M Hill
Offering a diverse range of environmental and engineering consulting services in the U.S. and internationally.
http://www.ch2m.com/

KJM & Associates, LTD.
National project and construction management consulting firm. Provides information management solutions that include on-line web-based project management and services. Headquarters in Bellevue, Washington, United States.
http://kjmassoc.com/

Boyle Engineering Corporation
Providing a civil, electrical, mechanical, structural, environmental, instrumentation, transportation, surveying and water resources engineering services to public and private clients throughout the world.
http://www.boyleengineering.com/

Bryant Associates, Inc.
A minority-owned consulting engineering and surveying firm founded in 1976 and located in the northeast USA.
http://www.bryant-engrs.com/

Dayton & Knight Ltd.
A multi-disciplinary Canadian consulting firm based in British Columbia providing engineering and environmental consulting services to both private and public clients.
http://www.dayton-knight.com/

C&S Companies
Providing solutions to planning, design, construction, maintenance, and operations challenges.
http://www.cscos.com/

Gannett Fleming
Offers planning, engineering design, and construction management services by implementing practical solutions for environmental, transportation, water resources, industrial, and commercial projects.
http://www.gannettfleming.com/

GEI Consultants, Inc.
Offers multi-disciplined engineers and scientists to deliver integrated geotechnical, environmental, and water-related planning, design, and construction solutions.
http://www.geiconsultants.com/

Wade & Associates
Specializing in the investigation of the sewer system infrastructure and the development of rehabilitation programs to reduce infiltration and inflow.
http://www.wadeinc.com/

GRW
Full service engineering, architectural, planning and digital mapping firm.
http://www.grwinc.com/

Montgomery Watson
Engineering firm offering more than 3,600 specialists located in more than 30 countries.
http://www.mw.com/

Harris & Associates
The program managers, civil engineers, and construction managers of the company serve the specialized needs of public agencies in the West.
http://www.harris-assoc.com/

Hayward Baker
Ground Improvement solutions. Only Hayward Baker, North America's leading specialty contractor, has the diversity of Ground Modification techniques to offer the optimum solution to your soils problems.
http://www.haywardbaker.com/

Stantec Inc.
Provides engineering, consulting, and design services to both public and private clients in the areas of land development, building, water resources, transportation, and parks and recreation.
http://www.stantec.com/

Jacobs Associates
A San Francisco-based consulting engineering firm providing engineering design, claims, and construction management services for contractors, public agencies, and private owners, attorneys, and surety and insurance companies.
http://www.jacobssf.com/

MGD Technologies Inc.
Sewer, stormwater and water system field inspection and testing services. Flow monitoring equipment and services. Water use surveys. Engineering studies.
http://www.mgdinc.com/

Michael Latas & Associates, Inc.
We are a full-service executive search and professional recruiting firm serving the construction industry exclusively.
http://www.latas.com/

Mueser Rutledge Consulting Engineers
Specialized foundation engineering services since 1910.
http://www.mrce.com/

O'Brien & Gere
Provides start-to-finish project services with engineering design, construction, contract operations, laboratory analysis, and manufacturing, internationally.
http://www.obg.com/

Kennedy/Jenks Consultants
A full-service engineering and environmental sciences consulting firm, serving clients throughout the Western United States and in Washington D.C.
http://www.kennedyjenks.com/

Parsons Corporation
One of the world's largest engineering and construction organizations specializing in infrastructure, transportation, planning, environmental, industrial manufacturing, and energy and chemicals for private industries and government agencies.
http://www.parsons.com/

Patterson/Bach Communications
Marketing firm serving the engineering and construction industries.
http://www.pat-bach.com/

Proto-Power Corporation [PPC]
Dower industry engineering, design and project management.
http://www.protopower.com/

Weston & Sampson Engineers, Inc.
A full service environmental and infrastructure engineering consulting firm.
http://www.westonandsampson.com/

Jason Consultants International, Inc.
Consultants in all aspects of underground utility and structure construction and rehabilitation. Commercial, technical and market studies consultants to the underground industry.
http://www.jasonconsult.com/

WRc
A knowledge-based company with a strong research and development foundation and a range of scientific and engineering skills in the environmental field.
http://www.wrcplc.co.uk/

Norwegian Geotechnical Institute [NGI]
Geotechnical research, development, and advisory services in such fields as microtunnelling, auger and guided boring, and directional drilling.
http://www.ngi.no/

CDM
Provides consulting, engineering, construction, and operations services for both private and public clients.
http://www.cdm.com/

Division of Geotechnical Engineering IGT at ETH-Zurich
Research and scientific services. Stability analysis of tunnels, finite elements, slope and dam stability. Development of instruments for measuring deformations and (indirectly) pressures.
http://www.igt.ethz.ch/

Oboni Associates
Specialists in planning, design of geo-environmental systems, management of risks, hazards - crisis for transportation, natural resources, chemical, petrochemical, construction - energy industries. Services include trenchless tunnel design.
http://www.oboni.com/

S E A Consultants Inc.
Technical capabilities include water supply/wastewater, civil, geotechnical, structural and environmental engineering, as well as architectural and building services. SEA has in-house trenchless technology expertise.
http://www.seacon.com/

R&R Visual, Inc.
Pipeline inspection services including sonar profiling, televising via robotics, and geophysical surveys.
http://www.rapidview.com

Trenchless Technology Consultants Company, Inc.
TTCCI lets you keep your business operational above ground while rehabilitating your pipelines below. We specialize in trenchless pipe repair and rehabilitation and can safely and effectively identify pipeline problems in a variety of settings.
http://www.trenchlesstech.com

Naylor Engineering Associates Ltd.
Naylor Engineering Associates Ltd. is a Kitchener, Ontario based consulting engineering firm founded in 1983. Our staff comprises over 35 experienced engineers, hydrogeologists, technologists, drilling personnel, and support staff. Specialty services in geotchnical and environmental engineering, Drilling services, Earthworks supervision and inspections, Laboratory testing of soils, concrete and asphalt.
http://www.nayloreng.com/

Blackhawk
Provides geophysical services for UXO, oil and gas, infrastructure, geotechnical, groundwater and mining applications.
http://www.blackhawkgeo.com/

Geotechnical Consulting Group
Co-ordinated group of highly qualified engineers, who pool their expertise to provide a specialist consulting service in geotechnics.
http://www.gcg.co.uk/

Professional Engineering Consultants, (PEC)
Provides engineering services across the full range of engineering disciplines for clients locally, regionally, and nationwide. Civil engineering projects have included trenchless pipe rehabilitation.
http://www.pec1.com/index.html

Horizontal Well & Environmental Consultants, LLC
Providing consulting services for engineering construction firms, chemical manufacturers, drill rig manufacturers, well material suppliers, and government agencies.
http://www.horizontalwell.com/

M G Bennett & Associates Web Site
We carry out bespoke mechanical and structural design engineering across virtually all engineering disciplines for clients throughout the world. Bennett has tunneling experience.
http://www.bennettmg.co.uk/

Green & Associates
Bob Green came out of the communications utility marketplace, and uses his sales and promotional talents to help people develop their internet marketing.
http://www.bobgreen.com/

J. D. Hair & Associates, Inc.
Specializes in projects involving the installation of buried utilities by trenchless construction methods. Based in Tulsa, Oklahoma.
http://www.jdhair.com/

Stanley Yim and Associates, Inc. (SYA)
Hawaiian based consulting firm with trenchless technology experience.
http://www.sya.com/

Landau Associates, Inc.
A full service geotechnical contracting company which provides environmental assessment services. Landau has trenchless new construction experience.
http://www.landauinc.com/

Water Support Services
Provide a range of innovative solutions and services to the problems of conserving water and preventing wastage.
http://www.water-support.co.uk/

The Thurber Group
The Thurber Group has offices in Victoria, Vancouver, Calgary, Edmonton, Fort McMurray, and Toronto. Professional services include tunneling and trenchless technology.
http://www.thurbergroup.com/

R.F. Binnie & Associates Ltd.
A Canadian municipal engineering and surveying company, located in British Columbia, Canada. Offices in Surrey, Burnaby, and Squamish. Services include trenchless technology.
http://www.binnie.com/

Brierley Associates, LLC.
Specializes in providing management consulting services for major underground construction projects. Includes a list of services, projects, and clients.
http://www.brierleyassociates.com/

Olsson Associates
Olsson Associates offers consulting engineering services in the fields of civil, structural, water resources, environmental sciences, transportation, land planning, electrical/mechanical engineering as well as surveying, and construction phase services. Services include trenchless technology.
http://www.oaconsulting.com/

Compton Engineering
Providing expertise for clients in the areas of both civil and environmental engineering. Experience includes directional boring.
http://www.comptonengineering.com/

Hager GeoScience, Inc.
Provides geological and geophysical consulting services for underground construction including tunnel mapping and all forms of vibration monitoring.
http://www.hagergeoscience.com/

Applied Professional Services, Inc.: Issaquah WA
Subsurface utility engineering, right of way, geophysical exploration, serving a wide range of industries and government agencies nationwide.
http://www.apslocates.com

Utility Locating Contractors
Provides underground utility locating services. A subsidiary of Dycom Industries, Inc., is a service organization for the major utility companies in the United States. From underground utility locations, to engineering and other services.
http://www.sts-locates.com

GeoConSol, Inc.
Consultants in geotechnical and underground construction, microtunneling, machine selection, pre-bid estimates, problem solving, and differing site conditions.
http://www.geoconsol.com

Downhole Surveys Pty Ltd,
Offers borehole surveying, geophysical logging and interpretation to the mining, mineral exploration and civil engineering industries in Australia, New Zealand and South East Asia.
http://www.downhole.com.au/

Utility Testing & Services, Ltd.
Offers a range of pipe inspection and testing services. Services include video inspection, pressure and smoke tests, and laser profiling.
http://www.uts-llc.com/

Lawler, Matusky & Skelly Engineers LLP
Offers a full range of consulting services in environmental science and engineering. Based in Pearl River, New York.
http://www.lmseng.com/

SubTerra Inc.
SubTerra, Inc. is an engineering company specializing in mining, geotechnical and environmental engineering. Our experienced engineers, geologists and team of specialist associates allow us to offer a broad range of engineering services for each stage in the investigation, design and construction phases of mine and civil projects.
http://www.subterra.us