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.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 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 |
7,561 | |||
| 2 |
Norconsultnorconsult.no
Multidisciplinary consultancy offering engineering, design, planning, and project management services across public and private sectors globally. |
4,574 | |||
| 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 |
3,018 | |||
| 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. |
2,325 | |||
| 5 |
PwC Norwaypwc.no
A leading global professional services firm with deep expertise in auditing, advisory, and legal services, operating in 155 countries worldwide |
1,802 | |||
| 6 | 1,596 | ||||
| 7 | 1,540 | ||||
| 8 |
KPMG Norwaykpmg.com
Providing audit, consulting, legal services with focus on cybersecurity, sustainability, technology, and future-oriented business solutions for clients. |
1,514 | |||
| 9 | 1,471 | ||||
| 10 |
Deloitte Norwaydeloitte.com
Global network offering audit, consulting, financial advisory, risk, and tax services to public and private clients in various industries worldwide |
1,253 | |||
| 11 |
Asplan Viak ASasplanviak.no
Provides multidisciplinary consulting in architecture, engineering, planning, and environmental services focusing on sustainable, functional, and client-oriented project solutions. |
1,211 | |||
| 12 |
Axess Groupaxessgroup.com
Specializing in sustainable solutions for key industries worldwide, we focus on HSEQ to maximize production uptime, safety, and operational efficiency |
1,152 | |||
| 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 |
1,017 | |||
| 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 |
939 | |||
| 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 |
929 | |||
| 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 |
846 | |||
| 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 |
782 | |||
| 18 | 745 | ||||
| 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 |
744 | |||
| 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 |
720 | |||
| 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 |
702 | |||
| 22 | 699 | ||||
| 23 | 655 | ||||
| 24 |
Varejo β¨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 |
643 | |||
| 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 |
638 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 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 |
623 | |||
| 27 | 618 | ||||
| 28 | 612 | ||||
| 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 |
611 | |||
| 30 | 604 | ||||
| 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 |
554 | |||
| 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 |
540 | |||
| 33 | 540 | ||||
| 34 | 533 | ||||
| 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 |
518 | |||
| 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 |
499 | |||
| 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 |
495 | |||
| 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 |
480 | |||
| 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 |
479 | |||
| 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 |
465 | |||
| 41 | 460 | ||||
| 42 |
Webstepwebstep.no
A profitable technology and consulting firm with 400+ IT experts, providing uncomplicated solutions to complex problems for customers across industries |
430 | |||
| 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 |
416 | |||
| 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 |
415 | |||
| 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 |
411 | |||
| 46 |
BAHR β law firmbahr.no
Leading Norwegian law practice with over 160 lawyers providing domestic and international legal services in commercial law, transactions, and dispute resolution |
406 | |||
| 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 |
404 | |||
| 48 | 403 | ||||
| 49 |
Wiersholmwiersholm.no
Leading Norwegian law firm specializing in business law, offering clear and responsible advice to clients committed to societal development and sustainability |
394 | |||
| 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. |
369 | |||
Turn this list into pipeline
Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.
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.
More company lists in Norway
- The largest companies in Norway 2,027
- Multinational companies in Norway 556
- Retail chains in Norway 225
- Critical infrastructure operators in Norway 220
- Software Development companies in Norway 216
- SaaS companies in Norway 201
- Government Administration companies in Norway 169
- Companies with in-house R&D in Norway 162
- Financial services firms in Norway 141
- Public sector organisations in Norway 132
- Manufacturers in Norway 130
- Energy companies in Norway 107
- IT Services and IT Consulting companies in Norway 103
- Hardware manufacturers in Norway 102
- Corporate groups and holding companies in Norway 100
- Publicly traded companies in Norway 99
- Financial Services companies in Norway 95
- Education providers in Norway 94
- Healthcare providers in Norway 94
- Companies with a mobile app in Norway 89
- Subscription businesses in Norway 84
- IT services companies in Norway 78
- Oil and Gas companies in Norway 76
- Hotel and hospitality groups in Norway 75