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Top 50 professional services firms in Norway

Tamtam tracks 116 professional services firms headquartered in Norway. This list ranks the 50 largest by number of employees on LinkedIn, led by OSM Thome, Norconsult and Multiconsult. Their median headcount is 638. Half of them were founded in 1987 or later. The most common headquarters are Oslo (28), Stavanger (4) and Bergen (2).

πŸ‡³πŸ‡΄ Norway50 companiesUpdated Nov 11, 2026

This selection of Norwegian professional services firms includes large, established companies as well as some younger ones. They span various sectors from maritime services and civil engineering to IT consulting and financial advisory. Notable firms include OSM Thome, a provider of technical and digital asset management for the offshore and maritime industry, and Norconsult, a multidisciplinary consultancy in engineering, design, and project management.

Other significant companies are Multiconsult, offering diverse consulting and engineering services, and Bouvet ASA, which specializes in technology, communication, and management. A clear pattern is the concentration of headquarters in Oslo, indicating the capital's role as a central hub for professional services in Norway.

#CompanyIndustryHeadquarters EmployeesFounded
1
OSM Thomeosmthome.com

A leading provider of technical and digital asset management services to the offshore and maritime industry, ensuring customer success around the clock

Maritime πŸ‡³πŸ‡΄ Arendal 7,561 1963
2
Norconsultnorconsult.no

Multidisciplinary consultancy offering engineering, design, planning, and project management services across public and private sectors globally.

Civil Engineering πŸ‡³πŸ‡΄ Sandvika 4,574 1929
3
Multiconsultmulticonsult.no

Multiconsult offers a wide range of consulting, engineering, and design services in various sectors, with a focus on meeting customer expectations and achieving satisfaction

Construction πŸ‡³πŸ‡΄ Oslo 3,018 1908
4
Bouvet ASAbouvet.no

Leading Scandinavian consulting company providing technology, communication, and management services. Offers development and advisory services to public and private sector clients.

IT Services and IT Consulting πŸ‡³πŸ‡΄ Oslo 2,325 2002
5
PwC Norwaypwc.no

A leading global professional services firm with deep expertise in auditing, advisory, and legal services, operating in 155 countries worldwide

Business Consulting and Services πŸ‡³πŸ‡΄ Oslo 1,802 n/a
6
AGRagr.com

A multi-disciplinary engineering consultancy and software provider specializing in energy solutions, including well management, CCUS, hydrogen, geothermal, and seabed minerals

Oil and Gas πŸ‡³πŸ‡΄ Oslo 1,596 1987
7
AIDERaider.no

A leading competence house redefining the accounting industry with a focus on technology and skilled professionals to help leaders succeed

Accounting πŸ‡³πŸ‡΄ Oslo 1,540 2019
8
KPMG Norwaykpmg.com

Providing audit, consulting, legal services with focus on cybersecurity, sustainability, technology, and future-oriented business solutions for clients.

Business Consulting and Services πŸ‡³πŸ‡΄ Oslo 1,514 n/a
9
BDO Norgebdo.no

This company offers client-focused services with local expertise, delivering professional solutions and creating unique experiences, serving global to small enterprises

Business Consulting and Services πŸ‡³πŸ‡΄ Oslo 1,471 1913
10
Deloitte Norwaydeloitte.com

Global network offering audit, consulting, financial advisory, risk, and tax services to public and private clients in various industries worldwide

Management Consulting πŸ‡³πŸ‡΄ Oslo 1,253 1916
11
Asplan Viak ASasplanviak.no

Provides multidisciplinary consulting in architecture, engineering, planning, and environmental services focusing on sustainable, functional, and client-oriented project solutions.

Civil Engineering πŸ‡³πŸ‡΄ Sandvika 1,211 1958
12
Axess Groupaxessgroup.com

Specializing in sustainable solutions for key industries worldwide, we focus on HSEQ to maximize production uptime, safety, and operational efficiency

Oil and Gas πŸ‡³πŸ‡΄ Molde 1,152 n/a
13
Forsvarets forskningsinstitutt - FFIffi.no

Leading technology competence center under the Ministry of Defence with over 800 employees, specializing in research and development in various fields to enhance Norway's defense capabilities

Research Services πŸ‡³πŸ‡΄ Kjeller 1,017 1946
14
Rystad Energyrystadenergy.com

An independent advisory and research firm providing data and insights for decision-making in global energy markets, spanning oil, gas, renewables, and more

Information Services πŸ‡³πŸ‡΄ Oslo 939 2004
15
Rosenberg Worleyworley.com

A fully-integrated engineering, fabrication, and construction company based in Norway, offering expertise in the energy transition with a genuine approach

Oil and Gas πŸ‡³πŸ‡΄ HundvΓ₯g 929 1896
16
Global Maritimeglobalmaritime.com

Global Maritime provides comprehensive offshore project lifecycle services, specializing in engineering, design, marine warranty surveying, risk management, and decommissioning with innovative solutions

Engineering Services πŸ‡³πŸ‡΄ Stavanger 846 1979
17
Moreld Applyapply.no

A leading engineering company specializing in projects from concept to completion, offering services in maintenance, modifications, system integration, and operations support

Oil and Gas πŸ‡³πŸ‡΄ Stavanger 782 1979
18
99x99x.io

A technology company based in Norway, specializing in co-creating innovative digital products for the Scandinavian market and recognized as a top workplace in Asia and Sri Lanka

IT Services and IT Consulting πŸ‡³πŸ‡΄ Oslo 745 n/a
19
Γ…F Norgeafconsult.com

An international engineering and design firm focusing on energy, industry, and infrastructure, creating sustainable solutions with skilled employees and technology worldwide

Construction πŸ‡³πŸ‡΄ Oslo 744 n/a
20
Oceaneering Asset Integrityoceaneering.com

A global provider of Integrity and Inspection Services for various industries including oil & gas, nuclear power, construction, offering a range of specialized solutions

Oil and Gas πŸ‡³πŸ‡΄ Bergen 720 n/a
21
Pedagogisk VikarSentral ASpvs.no

A user-friendly substitute service for all areas of education and childcare, prioritizing quality, continuity, engagement, and availability to support both clients and substitutes

Staffing and Recruiting πŸ‡³πŸ‡΄ Bergen 702 2004
22
APPLYapply.no

A leading multi-discipline engineering company specializing in oil and gas projects on the Norwegian Continental Shelf, focusing on operations, maintenance, and modifications for improved asset value and performance

Oil and Gas πŸ‡³πŸ‡΄ Stavanger 699 n/a
23
Nemkonemko.com

The company ensures compliance with global requirements through pre-compliance, international approval, product testing, and certifications, helping to create a safer world

International Trade and Development πŸ‡³πŸ‡΄ Lysaker 655 1933
24
Varejo ✨bloomoslo.no

Retail House Varejo specializes in helping brands and chains connect with customers at the point of purchase through various marketing activities in Nordic countries

Marketing Services πŸ‡³πŸ‡΄ Oslo 643 2013
25
Rosenberg WorleyParsonsworleyparsons.com

The company operates in engineering, fabrication, and construction for offshore oil and gas projects, specializing in front end engineering, maintenance, and subsea services

Oil and Gas πŸ‡³πŸ‡΄ 638 n/a

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26
NoA - The North Alliancethenorthalliance.com

A Nordic-based creative and tech group with over 1200 experts focused on driving customer-driven growth in Sweden, Norway, Denmark, Finland, and Poland

IT Services and IT Consulting πŸ‡³πŸ‡΄ Oslo 623 2014
27
Iteraitera.com

A leading international company specializing in technology and digital communication services, enabling customers to accelerate sustainable digital transformation and capture new business opportunities globally

IT Services and IT Consulting πŸ‡³πŸ‡΄ Oslo 618 1999
28
321321.no

A consultancy firm focused on digitalization and efficiency, offering development of digital solutions and resource leasing in programming, project management, and advisory services

Software Development πŸ‡³πŸ‡΄ Hamar 612 2019
29
Personalhuset Norwaypersonalhuset.no

A leading Nordic recruitment and staffing company offering industry-specific services in recruitment, staffing, restructuring, and consulting with a focus on innovation and employee commitment

Staffing and Recruiting πŸ‡³πŸ‡΄ Oslo 611 2001
30
Bekkbekk.no

A Norwegian company with over 500 specialists in strategy, design, and technology, creating innovative solutions for businesses with ambitious goals

IT Services and IT Consulting πŸ‡³πŸ‡΄ Oslo 604 2000
31
LINK Arkitekturlinkarkitektur.com

Architect office in Scandinavia with 500 employees across Denmark, Norway, and Sweden Specializing in sustainable social architecture to improve quality of life

Architecture and Planning πŸ‡³πŸ‡΄ Oslo 554 2000
32
SchjΓΈdtschjodt.com

Internationally recognized law firm in Scandinavia, specializing in M&A transactions and litigation, known for legal excellence, innovative solutions, and exceptional client service

Law Practice πŸ‡³πŸ‡΄ Sentrum 540 1936
33
TRY Apttry.no

Innovative interactive experience provider bridging online and traditional advertising, delivering creative solutions using technology, experience and strategic knowledge

Advertising Services πŸ‡³πŸ‡΄ Oslo 540 1999
34
HRPhrpas.no

Specializing in project management for construction and infrastructure projects, we aim to be a leading contributor to Norwegian society's development and success

Construction πŸ‡³πŸ‡΄ Oslo 533 2005
35
TolkeNett AStolkenett.no

With 15 years of experience, we offer high-quality interpreting and translation services 24/7 From language editing to writing, we cover all language needs

Translation and Localization πŸ‡³πŸ‡΄ Oslo 518 2003
36
ECIT Norgeecit.com

A well-established Nordic group offering business optimization solutions with 2,500 employees across multiple countries in the Nordics and Europe

Outsourcing and Offshoring Consulting πŸ‡³πŸ‡΄ Fornebu 499 n/a
37
Jobzone Norge ASjobzone.no

Jobzone is a Norwegian-owned staffing company with a focus on being the most attractive option for job seekers and clients They offer personalized service and prioritize employee well-being

Staffing and Recruiting πŸ‡³πŸ‡΄ Oslo 495 2002
38
NGI - Norwegian Geotechnical Institutengi.no

NGI is an international center for research and consultancy in engineering-related geosciences, specializing in finding sustainable solutions for infrastructure and environmental challenges worldwide

Research Services πŸ‡³πŸ‡΄ Oslo 480 1953
39
Thommessenthommessen.no

A leading Norwegian business law firm with offices in Oslo, Bergen, Stavanger, and London, providing comprehensive legal services for Norwegian businesses for 165 years

Law Practice πŸ‡³πŸ‡΄ Oslo 479 1856
40
Wikborg Reinwr.no

An international law firm based in Oslo, with offices in Bergen, London, Singapore, and Shanghai, offering expert legal assistance across various industries

Law Practice πŸ‡³πŸ‡΄ Oslo 465 1923
41
AFFaff.no

A leading leadership and organizational development consultancy in Norway, offering top-rated programs in partnership with NHH - Norwegian School of Economics

Business Consulting and Services πŸ‡³πŸ‡΄ Bergen 460 1952
42
Webstepwebstep.no

A profitable technology and consulting firm with 400+ IT experts, providing uncomplicated solutions to complex problems for customers across industries

IT Services and IT Consulting πŸ‡³πŸ‡΄ Oslo 430 2000
43
WSP i Norgewsp.com

A leading company in project management, providing services to public and private sectors in industries such as construction, transportation, energy, and industrial sectors

Professional Services πŸ‡³πŸ‡΄ Oslo 416 1997
44
Firesafefiresafe.no

FireSafe is a total supplier for fire protection services, including consultancy, execution, control, training, and product development for various types of buildings and structures

Fire Protection πŸ‡³πŸ‡΄ LΓΈrenskog 415 1981
45
MDE Groupmde-group.com

Experts in global recruitment, relocation and project support Providing skilled personnel and industry-leading staffing solutions worldwide, ensuring compliance and perfect matches

Staffing and Recruiting πŸ‡³πŸ‡΄ Stavanger 411 2007
46
BAHR – law firmbahr.no

Leading Norwegian law practice with over 160 lawyers providing domestic and international legal services in commercial law, transactions, and dispute resolution

Law Practice πŸ‡³πŸ‡΄ Oslo 406 1966
47
SpareBank 1 Regnskapshuset SMN ASsparebank1.no

Provider of financial services, business and agriculture accounting, property management, and ERP solutions Emphasis on local presence with over 40 office locations Part of SpareBank 1 group

Accounting πŸ‡³πŸ‡΄ Trondheim 404 1985
48
Amestoamesto.no

A family-owned business specializing in business solutions, artificial intelligence, IT services, accounting, HR, and staffing, promoting a culture of inquiry and sustainability

IT Services and IT Consulting πŸ‡³πŸ‡΄ Oslo 403 2002
49
Wiersholmwiersholm.no

Leading Norwegian law firm specializing in business law, offering clear and responsible advice to clients committed to societal development and sustainability

Law Practice πŸ‡³πŸ‡΄ Oslo 394 1875
50
Fieldfieldgeo.com

This company captures, processes, and delivers accurate geospatial information, helping organizations make better decisions for planning, building, and managing environments across the Nordics.

Surveying and Mapping Services πŸ‡³πŸ‡΄ Oslo 369 2004

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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 11, 2026.

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