The work they do may vary, but without the professional services firms on the 2017 PROFIT 500 ranking of Canada’s Fastest-Growing Companies, many of the country’s businesses wouldn’t function.

The 25 professional services firms on this year’s ranking grew their revenues an average of 260% between 2011 and 2016. Collectively they employed 4,068 full time-equivalent employees in 2016.

Here is the complete list of Canada’s fastest-growing professional services companies for 2017.

1. The Burnie Group
PROFIT 500: No. 87
Growth (2011–2016): 831%
Revenue (2016): $5–10 million
Headquarters: Toronto, Ont.
What it does: Offers management consulting services with a focus on operations

2. Brevitas Consulting
PROFIT 500: No. 93
Growth (2011–2016): 796%
Revenue (2016): $5–10 million
Headquarters: Richmond Hill, Ont.
What it does: Provides advisory services related to quality, compliance and regulatory affairs

3. Atypic
PROFIT 500: No. 127
Growth (2011–2016): 571%
Revenue (2016): $2–5 million
Headquarters: Montreal, Que.
What it does: Offers consulting services for charities and non-profits

4. Trindent Management Consulting
PROFIT 500: No. 134
Growth (2011–2016): 528%
Revenue (2016): $10–20 million
Headquarters: Toronto, Ont.
What it does: Provides management consulting to clients in energy, finance and health care.

5. Exia Group
PROFIT 500: No. 150
Growth (2011–2016): 468%
Revenue (2016): $2–5 million
Headquarters: Montreal, Que.
What it does: Offers business intelligence consulting and data analytics

6. Optimus SBR
PROFIT 500: No. 180
Growth (2011–2016): 364%
Revenue (2016): $20–50 million
Headquarters: Toronto, Ont.
What it does: Delivers management-consulting services to private and public companies

7. Bennett Design
PROFIT 500: No. 205
Growth (2011–2016): 315%
Revenue (2016): $5–10 million
Headquarters: Uxbridge, Ont.
What it does: Offers interior design services and workplace strategy consulting for businesses

8. Isaac Operations
PROFIT 500: No. 244
Growth (2011–2016): 249%
Revenue (2016): $2–5 million
Headquarters: Toronto, Ont.
What it does: Consults companies on improving operations and financial processes

9. Pacific Quorum Properties
PROFIT 500: No. 278
Growth (2011–2016): 216%
Revenue (2016): $5–10 million
Headquarters: Vancouver, B.C.
What it does: Manages residential, commercial and investment properties in B.C.

10. CarData Consultants
PROFIT 500: No. 284
Growth (2011–2016): 208%
Revenue (2016): $2–5 million
Headquarters: Oakville, Ont.
What it does: Provides employee vehicle reimbursement services across North America

11. Wish Group
PROFIT 500: No. 286
Growth (2011–2016): 207%
Revenue (2016): $50–100 million
Headquarters: Toronto, Ont.
What it does: Offers telecommunications, media and HR services

12. Scribendi.com
PROFIT 500: No. 302
Growth (2011–2016): 196%
Revenue (2016): $5–10 million
Headquarters: Chatham, Ont.
What it does: Delivers online proofreading and editing services

13. ICC Property Management
PROFIT 500: No. 321
Growth (2011–2016): 177%
Revenue (2016): $5–10 million
Headquarters: Markham, Ont.
What it does: Offers management services for condo boards and developers

14. AET Group
PROFIT 500: No. 344
Growth (2011–2016): 162%
Revenue (2016): $2–5 million
Headquarters: Kitchener, Ont.
What it does: Provides environmental consulting, auditing and scientific services

15. Kids & Company
PROFIT 500: No. 349
Growth (2011–2016): 157%
Revenue (2016): $50–100 million
Headquarters: Richmond Hill, Ont.
What it does: Runs corporate child-care centres and provides other dependent-care services

16. RWDI (Rowan Williams Davies & Irwin)
PROFIT 500: No. 352
Growth (2011–2016): 156%
Revenue (2016): $50–100 million
Headquarters: Guelph, Ont.
What it does: Consults on specialty engineering services for developers of buildings and structures

17. Safety First Consulting
PROFIT 500: No. 358
Growth (2011–2016): 150%
Revenue (2016): $2–5 million
Headquarters: Vaughan, Ont.
What it does: Provides injury management and health and safety services for employers

18. Wellpoint Health Services
PROFIT 500: No. 373
Growth (2011–2016): 138%
Revenue (2016): $10–20 million
Headquarters: Toronto, Ont.
What it does: Provides occupational health and safety materials and training

19. Delegatus Legal Services
PROFIT 500: No. 401
Growth (2011–2016): 118%
Revenue (2016): $5–10 million
Headquarters: Montreal, Que.
What it does: Provides legal services and advice for businesses

20. Loopstra Nixon LLP
PROFIT 500: No. 436
Growth (2011–2016): 102%
Revenue (2016): $10–20 million
Headquarters: Toronto, Ont.
What it does: Offers corporate and municipal legal services

21. Dorward & Company LLP
PROFIT 500: No. 470
Growth (2011–2016): 85%
Revenue (2016): $2–5 million
Headquarters: Edmonton, Alta.
What it does: Offers chartered accountant services to business owners

22. Iron Horse Security & Investigations
PROFIT 500: No. 489
Growth (2011–2016): 81%
Revenue (2016): $5–10 million
Headquarters: Ottawa, Ont.
What it does: Provides security guards for public and private organizations

23. STGM Architectes
PROFIT 500: No. 492
Growth (2011–2016): 78%
Revenue (2016): $5–10 million
Headquarters: Quebec, Que.
What it does: Offers architectural services for institutional, residential and industrial projects

24. Arrow Engineering
PROFIT 500: No. 496
Growth (2011–2016): 77%
Revenue (2016): $10–20 million
Headquarters: Edmonton, Alta.
What it does: Provides mechanical, electrical, structural and civil engineering consulting services to clients in the building industry

25. BTB Real Estate Investment Trust
PROFIT 500: No. 498
Growth (2011–2016): 77%
Revenue (2016): $50–100 million
Headquarters: Montreal, Que.
What it does: Owns and manages non-residential properties