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 Connect with one of NH’s largest engineering firms, as featured in NH Business Review’s 2025 Book of ListsBEING A PAID SUBSCRIBER HAS ITS PERKS. Visit nhbr.com/ranked-lists to download the electronic version of this list and all data from the Book of Lists.
| Column 1 | Firm
Location(s) | NH Executive(s)
WebsitePhone | No. NH
Engineers
No. NH
Employees | Specialties | | 1 | Hoyle, Tanner & Associates, Inc.
150 Dow St., Manchester, NH 03101
Also: Portsmouth (603-431-2520) | Christopher R. Mulleavey, P.E., CEO/pres.
hoyletanner.com; 603-669-5555 | 47
131 | Water Resources, Structural, Airport, Transportation and Civil Planning, Design, and Construction
Engineering and Inspection Services | | 2 | Wright-Pierce
230 Commerce Way, Suite 302, Portsmouth , NH 03801 | Paul Birkel, pres./ceo
wright-pierce.com; 888-621-8156
| 41
62 | Architectural, Civil, Construction Mgmt., Design-Build, Electrical, Environmental, Mechanical,
Structural, Transportation, Drinking Water, Wastewater, Water Resources, Civil Engineering &
Community Development | | 3 | Greenman-Pedersen Inc.
116 South River Road, Building B, Suite 1, Bedford, NH 03110
Also: Bedford and Salem | Timothy Letton, EVP, New England branch mgr.
gpinet.com; 603-766-8259 | 37
84 | Civil engineering, surveying, structural engineering, planning, transportation, construction
management, construction inspection | | 4 | VHB
2 Bedford Farms Drive, Suite 200, Bedford, NH 03110 | Mike Carragher, CEO/pres.
Dave Fenstermacher, NH mng. dir.
vhb.com; 603-391-3900 | 35
100 | Transportation engineering, land development, environmental, planning and design, energy services | | 5 | GZA GeoEnvironmental Inc.
5 Commerce Park North, Suite 201, Bedford, NH 03110
Also: Keene (603-283-0300); Meredith (603-279-4425) | Ronald A. Breton, PE, sr. princ.
gza.com; 603-623-3600 | 35
73 | Environmental/Geotechnical Engineering, Regulatory Compliance, Construction Management,
Remediation, Water Resources/Permitting, Natural Resources | | 6 | CDM Smith
670 No. Commercial St., Suite 208, Manchester, NH 03101 | David G. Polcari, PE, SVP
cdmsmith.com; 603-222-8300 | 34
46 | Transportation, Civil, Construction Management, Design-Build, Planning, Environmental,
Architectural, Mechanical, Structural, Transportation, Geographical Information Systems, ArcGIS,
Asset Management | | 7 | TFMoran, Inc.
48 Constitution Drive, Bedford, NH 03110
Also: 170 Commerce Way, Suite 102, Portsmouth, NH 03801, 603-431-2222 | Robert Duval, PE, LEED AP, pres./chief engineer
tfmoran.com; 603-472-4488 | 31
68 | Civil, Traffic, Transportation, Structural, Land Surveying, Landscape Architecture, Environmental
Permitting, Design-Build, Stormwater Monitoring, Construction Support, 3D Rendering Services | | 8 | Jacobs Engineering Group Inc.
Two Executive Park Drive, Bedford, NH 03110
Also: 5 Wentworth Drive, Suite 3, Hudson, NH 03051 | John Giudici, reg. office mngr.
jacobs.com; 603-666-7181 | 28
38 | Architecture/Engineering, Construction & Field, Environmental Health & Safety, Planning,
Management, Modular Fabrication & Technology Services | | 9 | Sanborn, Head & Associates, Inc.
6 Bedford Farms Drive, Suite 201, Bedford, NH 03110 | Matthew Poirier, EVP/COO
Barret S. Cole, PG, pres./CEO
sanbornhead.com; 603-229-1900 | 27
111 | Hydrogeologic and Environmental Investigations, Geotechnical and Solid Waste Engineering,
Natural Gas Infrastructure Engineering | | 10 | Stantec Consulting Services Inc.
5 Dartmouth Drive, Suite 200, Auburn, NH 03032 | Gerard Fortin, princ.
stantec.com; 603-669-8672 | 27
66 | Civil/structural engineering, environmental consulting, architecture, interior design, landscape
architecture, geotechnical engineering, project management | | 11 | Barry-Wehmiller Design Group
5 Chenell Drive, Suite 3, Concord, NH 03301 | Mike Kolakowski, mng. partner, Northeast region
bwdesigngroup.com; 603-225-0010 | 24
77 | Architecture, Civil, Construction Management, Design-Build, Electrical, Interior Design, Mechanical,
Planning, Structural | | 12 | Weston & Sampson Engineers Inc.
100 International Drive, Suite 152, Portsmouth, NH 03801
Also: 150 Dow St., Tower 4, Suite 350, Manchester, NH 03101, 603-263-9296 | Chris Perkins, P.E., regional mgr. NH & ME
westonandsampson.com; 603-431-3937 | 24
65 | Drinking Water & Wastewater, Environmental, Civil, Stormwater, Geotechnical, Architectural,
Renewable Energy, Design/Build Construction, Solid Waste | | 13 | RFS Engineering
71 Water St., Laconia, NH 03246 | Chris Shumway, PE, LEED AP, pres.
rfsengineering.com; 603-524-4647 | 22
102 | MEP/FP, Telecommunications, Structural, Civil, Commissioning |
Source: NH Business Review survey and research CLICK TO CONTINUE
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