This selection of professional services firms in Calgary represents a mix of established companies and those founded more recently. Many of these firms, such as Precision Drilling and Equinox Engineering, operate in the oil and gas sector, while others like Critical Mass (digital agency) and S.i. Systems (IT staffing) focus on technology and digital solutions. The presence of companies like MNP (accounting) and Bennett Jones (law) highlights the city's strong professional services foundation.
The data shows a notable concentration of engineering services, with firms like DIALOG, Bantrel Co., and Vista Projects providing specialized expertise in areas ranging from urban planning to industrial engineering. This suggests a robust demand for technical and design solutions within the region, extending to environmental and infrastructure projects.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 | 9,798 | ||||
| 2 |
Precision Drillingprecisiondrilling.com
A leading provider of safe and high-performance services to the oil and gas industry, offering drilling rigs, technology solutions, environmental stewardship, and support services |
2,802 | |||
| 3 |
Critical Masscriticalmass.com
Designing brand experiences, full-service digital agency, global presence, working with top brands, data-driven approach, focus on customer experience and innovative technologies |
1,810 | |||
| 4 |
DIALOGdialogdesign.ca
Architects, urban planners, engineers, and landscape architects collaboratively improve communities and the environment through design and multidisciplinary solutions for urban vibrancy, health, and transportation. |
1,224 | |||
| 5 |
Bennett Jonesbennettjones.com
An internationally recognized Canadian law firm with over 500 lawyers, specializing in various sectors such as mergers and acquisitions, energy, finance, litigation, and public policy |
1,184 | |||
| 6 |
AGAT Laboratoriesagatlabs.com
Specialized Canadian provider of analytical solutions globally, offering accurate and timely services in various industries including environmental, mining, petroleum, and food testing |
1,034 | |||
| 7 |
Bantrel Co.bantrel.com
Established in 1983, the company specializes in EPC/CM services for energy, mining & infrastructure projects, focusing on safety, quality, & efficiency Headquarters in Calgary, with operations across Canada and globally |
1,029 | |||
| 8 |
S.i. Systemssisystems.com
Canada's largest IT staffing agency connecting professionals with opportunities, helping individuals and businesses prosper through a 300,000-strong member network |
525 | |||
| 9 |
MNC (Martin Newby Consulting Ltd.)mncl.ca
A geomatics engineering firm specializing in cadastral and parcel mapping, offering innovative data collection and geomatics solutions to clients worldwide |
476 | |||
| 10 |
Equinox Engineering Ltd.equinox-eng.com
A global leader in EPCM services, specializing in gas processing, oil production, and sustainable energy solutions with a focus on quality and sustainability |
447 | |||
| 11 |
Alinea Internationalalineainternational.com
Providing technical and management expertise to governments, investors, companies, and communities for sustainable development and lasting positive change worldwide. |
389 | |||
| 12 |
Vista Projectsvistaprojects.com
Integrated industrial engineering firm specializing in digital transformation of projects and operations, with a focus on efficient designs and project execution |
385 | |||
| 13 |
Primary Engineering and Constructionprimaryeng.com
An engineering and construction leader specializing in electrical distribution, transmission, substation, and telecommunications services, with a focus on customer satisfaction and project management |
371 | |||
| 14 |
Entuitiveentuitive.com
This company specializes in structural engineering, building envelope, restoration, and special projects consulting across various sectors, utilizing advanced technology for efficient design solutions globally |
366 | |||
| 15 |
Micro Engineering Tech Incmicroengineering.ca
A leading Geomatics and Engineering company offering consulting and product services for Oil & Gas, Construction, and digital infrastructure sectors |
346 | |||
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. | |||||
| 16 |
Obsidian Engineeringobsidianeng.ca
A full-service EPCM with a small, experienced team providing efficient and cost-effective solutions for small to medium projects in the oil and gas industry |
313 | |||
| 17 |
Phasor Engineering Incphasorengineering.ca
A technological leader in high voltage substation engineering, offering full-service engineering, commissioning, and panel fabrication services with single-source responsibility |
272 | |||
| 18 |
Burnet, Duckworth & Palmer LLPbdplaw.com
A boutique law firm in Calgary with innovative legal minds, specializing in corporate and litigation matters for clients in various sectors |
267 | |||
| 19 |
FBC Farm and Small Business Tax Consultantsfbc.ca
Specializing in farm and small business taxes, we offer year-round tax planning, on-site preparation, consultation, and audit protection services |
258 | |||
| 20 |
Sproulesproule.com
Global energy consulting firm providing trusted and independent analysis, optimizing operational performance, and advising on M&A transactions and energy markets Headquarters in Calgary |
257 | |||
| 21 | 245 | ||||
| 22 |
Matrix Solutions Inc.onterris.com
A leading provider of environmental consulting and engineering services, delivering innovative solutions for infrastructure, energy, oil & gas, and mining sectors globally |
221 | |||
| 23 |
Tetranex Solutions Inc.tetranex.com
A multi-discipline engineering specializing in industrial automation, electrical systems, process engineering, and instrumentation solutions for various industries with extensive project implementation experience |
197 | |||
| 24 | 191 | ||||
| 25 |
primeHR Inc.primehr.ca
Specialized compensation administration and outsourcing consulting for small to mid-sized companies in Alberta, Canada, focusing on employee compensation plans and program management |
182 | |||
| 26 |
Irwin's Safety and Industrial Labour Services Ltdirwinsafety.com
Industrial workforce and safety training provider for the oil and gas industry, specializing in plant turnarounds, technical services, safety consulting, and safety training |
175 | |||
| 27 |
ASCENTascnltd.com
A Canadian company providing engineering services for the oil and gas industry, specializing in facility planning, design, construction, and operational support |
53 | |||
| 28 |
Journey Engineering Corporationjourneyengineering.com
A progressive consulting firm specializing in civil, process, mechanical, and electrical engineering services for the energy industry Building successful assets collaboratively |
52 | |||
| 29 | 51 | ||||
| 30 |
Integrated Geomaticsintegratedgeomatics.com
Offers comprehensive Geomatics and Environmental solutions, integrating assessments, regulatory strategy, design, surveying, remote sensing, and GIS mapping for client projects from feasibility to construction. |
45 | |||
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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.
More company lists in Calgary
- The largest companies in Calgary 745
- Oil and Gas companies in Calgary 248
- Energy companies in Calgary 204
- Multinational companies in Calgary 130
- Critical infrastructure operators in Calgary 83
- Publicly traded companies in Calgary 53
- Retail chains in Calgary 52
- Manufacturers in Calgary 50
- Companies with in-house R&D in Calgary 39
- SaaS companies in Calgary 39
- Hardware manufacturers in Calgary 37
- Consulting firms in Calgary 36
- Distributors and wholesalers in Calgary 32
- Logistics companies in Calgary 32
- Financial services firms in Calgary 31
- Construction companies in Calgary 30
- Software Development companies in Calgary 30
The same list elsewhere in Canada
- Professional services firms in Canada 481
- Professional services firms in Ontario 211
- Professional services firms in the province of Quebec 103
- Professional services firms in Alberta 81
- Professional services firms in British Columbia 59
- Professional services firms in Toronto 117
- Professional services firms in Montreal 65
- Professional services firms in Vancouver 34