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26 leading professional services firms in New Hampshire

Tamtam tracks 26 professional services firms headquartered in New Hampshire. This list ranks all of them by number of employees on LinkedIn, led by Pace Analytical Services, MAS Medical Staffing and Global Technical Talent, an Inc. 5000 Company. Their median headcount is 264. Half of them were founded in 1996 or later. The most common headquarters are Portsmouth (6) and Manchester (4).

馃嚭馃嚫 New Hampshire26 companiesUpdated Nov 14, 2026

The professional services firms in New Hampshire presented here are mostly mid-sized companies, with headcounts ranging from 119 to over 3,000 employees. The list shows a strong presence of staffing and recruiting agencies, alongside a variety of other service providers. Many of these companies have been established for several decades, indicating a mature business environment.

Key firms include Pace Analytical Services, which offers analytical testing and life sciences services, and MAS Medical Staffing, a staffing agency founded in 2002. Medicus Healthcare Solutions provides staffing solutions for healthcare organizations, while McLane Middleton, founded in 1919, is a legal services firm. PROCON focuses on integrated architecture, engineering, and construction management services, and Synergetics is a global management consulting firm.

#CompanyIndustryHeadquarters EmployeesFounded
1
Pace Analytical Servicespacelabs.com

Provides analytical testing, laboratory data, and life sciences services to help businesses, industries, and governments make critical decisions for a safer, healthier world.

Environmental Services 馃嚭馃嚫 Minneapolis 3,184 n/a
2
MAS Medical Staffingmasmedicalstaffing.com

A staffing agency with 20+ years experience offering per diem, contract, and travel staff through a unique hybrid approach and proprietary technology platform

Staffing and Recruiting 馃嚭馃嚫 Manchester 636 2002
3
Global Technical Talent, an Inc. 5000 Companygttit.com

A subsidiary of Chenega Corporation providing Total Talent Solutions, Global staffing, RPO, and Digital talent services to Fortune 500 clients

Staffing and Recruiting 馃嚭馃嚫 Portsmouth 614 1999
4
Medicus Healthcare Solutionsmedicushcs.com

This company offers exceptional staffing solutions and locum tenens services to healthcare organizations and providers across the United States

Staffing and Recruiting 馃嚭馃嚫 Windham 564 2004
5
CoreMedical Groupcoremedicalgroup.com

A leading national healthcare staffing agency specializing in placing nurses, allied healthcare professionals, physicians, and providing full-time permanent and contract/travel staffing services

Staffing and Recruiting 馃嚭馃嚫 Manchester 553 1989
6
Private Health Managementprivatehealth.com

A team of clinical experts provides unparalleled access to top doctors and treatments, navigating the healthcare system for optimal outcomes

Hospitals and Health Care 馃嚭馃嚫 Portsmouth 484 2007
7
RafterOne | An IPG Companyrafter.one

An expert Salesforce partner specializing in multi-cloud solutions for retail, manufacturing, and technology, offering fast implementation accelerators and digital advisory services

IT Services and IT Consulting 馃嚭馃嚫 Portsmouth 455 n/a
8
Goodwin Recruitinggoodwinrecruiting.com

A full-service recruiting agency focused on personalized services, integrity, diversity, and building strong partnerships with clients and candidates across various industries

Staffing and Recruiting 馃嚭馃嚫 Exeter 433 1999
9
Tax Preparergetyourtaxscore.com

Financial services company specializing in tax preparation, located in Newbury, New Hampshire, providing professional assistance with tax planning and compliance

Financial Services 馃嚭馃嚫 Newbury 391 n/a
10
McLane Middletonmclane.com

A leading law firm founded in New Hampshire in 1919, now the largest in the state, with expertise in various areas of law for clients in New England and beyond

Legal Services 馃嚭馃嚫 Manchester 388 1919
11
PROCONproconinc.com

An award-winning firm offering fully-integrated architecture, engineering, and construction management services with a focus on delivering exceptional projects

Design Services 馃嚭馃嚫 Hooksett 358 1935
12
York IEyork.ie

Advisory and venture capital firm specializing in helping technology companies grow by providing strategic guidance and investing in early-stage B2B SaaS startups

Venture Capital and Private Equity Principals 馃嚭馃嚫 Manchester 290 2019
13
Farm, A Flex Companyfarmpd.com

A healthcare and life science innovation company offering strategic, technological, and product development services to benefit patients and healthcare providers worldwide

Medical Equipment Manufacturing 馃嚭馃嚫 Hollis 264 1971

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14
BA Sciencesbasciences.com

Provider of high-quality analytical testing services to life science companies worldwide, committed to excellence, compliance, and innovation Headquarters in Salem, NH

Pharmaceutical Manufacturing 馃嚭馃嚫 Salem 257 1987
15
Synergetics - A Worldwide Resource For Business Problem Solvingsynergeticsww.com

A respected global management consulting firm partnering with companies to drive growth, enhance performance, and create sustainable improvements in efficiencies and profitability

Business Consulting and Services 馃嚭馃嚫 Portsmouth 119 1975
16
Waldron Engineering & Construction, Inc.waldron.com

A full-service firm specializing in analytics, engineering, and construction management for the energy industry, delivering sustainable and cost-effective energy solutions

Utilities 馃嚭馃嚫 Exeter 58 1992
17
Compass Retirement Consulting Groupcompass-cg.com

A Third Party Administrator offering retirement plan design, actuarial services, fiduciary services, ongoing consulting, and a focus on partnership, transparency, and exceptional service

Financial Services 馃嚭馃嚫 Stratham 42 2006
18
HTM Companieshtm.com

An organization specializing in advising businesses on operating in the modern era through services like vulnerability analysis and emergency management strategy

Security and Investigations 馃嚭馃嚫 Portsmouth 26 1986
19
Siltek Corporationsiltekcorp.com

Global IT consulting firm offering customized solutions for Public and Private sectors, specializing in system integration, software development, and IT implementation with a talented team

IT Services and IT Consulting 馃嚭馃嚫 Londonderry 17 1996
20
Yeoman Technology Group - Swell Mediayeomantechnologies.com

We are experts in optimizing digital strategies for manufacturers, publishers, and educators, focusing on sales, technology impact, and digital product enhancement/creation

Advertising Services 馃嚭馃嚫 Portsmouth 16 2008
21
Cohen & Winterscohenwinters.com

Dedicated New Hampshire law firm providing legal assistance in personal injury, family law, criminal defense, estate planning with experienced attorneys

Law Practice 馃嚭馃嚫 Concord 13 2009
22
ECCoEeccoe.com

A high-tech consulting firm specializing in engineering solutions for defense and commercial sectors, offering expertise from top experts in various fields

Engineering Services 馃嚭馃嚫 Hollis 12 2009
23
Martin, Lord & Osman, P.A.martinlordosman.com

A law practice company located in Laconia, New Hampshire, providing legal services from The Busiel Mill

Law Practice 馃嚭馃嚫 Laconia 12 1901
24
Germaine & Blaszka, P.A., Attorneys at Lawgermainelaw.com

A premier law firm with experienced attorneys dedicated to helping individuals and businesses resolve legal issues promptly and affordably, surpassing client expectations

Law Practice 馃嚭馃嚫 Derry 11 n/a
25
Brantjes Advocatenbrantjesadvocaten.nl

Ambitious and business-oriented law firm specializing in employment, corporate, and sports law, providing high-quality and personalized legal services through experienced lawyers

Law Practice 馃嚭馃嚫 Amsterdam 8 n/a
26
The MEG Companiesthemegcompanies.com

A multifaceted asset management firm specializing in real estate management, commercial brokerage, development administration, and consulting, with a talented team of professionals

Real Estate 馃嚭馃嚫 Londonderry 8 1988

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How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 14, 2026.

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