Callidus Engineering

What Callidus Engineering does

Callidus Engineering is a privately held professional mechanical and electrical (M&E) engineering consulting firm headquartered in London, Ontario, with regional offices in Kingston (opened 2017) and Kitchener-Waterloo (opened 2022). Founded in 2005 through the merger of J.E.D. Engineering and M.G.G. Engineering, the firm provides consulting design services for the building systems — HVAC, plumbing, power distribution, fire protection, life safety, communications, and specialized systems — that operate behind the scenes in built environments. The firm is owned by eight principals and serves clients across Ontario with project experience spanning all nine Canadian provinces and three territories, including remote northern work in Nunavut.

The firm's service portfolio is organized around six interconnected offerings: Electrical Systems Design, Mechanical Systems Design, Energy Modeling (physics-based simulation supporting SB-10 performance-based compliance and CMHC financing programs), Life Safety Systems, Special Systems (medical gas, kitchen hoods, hazardous gas, northern climate design), and Integrated Systems Testing (ULC S1001 certified). The firm employs approximately 60 staff, including 18 licensed professional engineers with cross-Canada certifications, and supports 8,000+ cumulative projects. Notable specializations include medical imaging suite engineering (demonstrated by work at Toronto General Hospital on Canada's first TRIGOR image-guided operating room), heritage building adaptive reuse (London Roundhouse, Frontenac Club), and ULC S1001 Integrated Systems Testing (100+ projects since 2021).

Revenue is generated through project-based professional engineering consulting fees billed directly to clients including developers, architects, municipalities, healthcare institutions, universities, and industrial operators. The go-to-market model is enterprise field sales led by principals and branch managers (Matthew VanGilst in London, Derek Reid in Kingston, Zam Abdulla in Kitchener-Waterloo), supplemented by referral relationships with architect and developer partners. The firm has no external institutional investors, no public listing, and no disclosed funding rounds; it is funded entirely through operating cash flows and ownership capital. Customer segments span residential, commercial, healthcare, industrial, institutional, municipal, transportation, hospitality, and educational buildings, with municipal projects identified as a primary and strongest segment.

Name

Callidus Engineering

Legal name

Callidus Engineering

Website

https://callidus.ca

Company type

Private

Founded year

2005

Operating status

Operating

Headcount range

11–50 employees

Short description

Callidus Engineering is a privately held mechanical and electrical engineering consulting firm providing building systems design across Ontario, Canada, with approximately 60 staff, 18 licensed engineers, and three offices serving healthcare, municipal, educational, industrial, and commercial clients.

Ownership category

akta.pro rank

Product category

Mechanical and Electrical Engineering Consulting

NAICS

Engineering Services (541330), Engineering Services (54133), Architectural, Engineering, and Related Services (5413)

SIC

Services-Engineering Services (8711), Services-Engineering, Accounting, Research, Management (8700)

akta.pro primary industry

MEP (Mechanical, Electrical & Plumbing) Engineering Consulting (BPAHAIAE)

akta.pro secondary industries

Engineering design services (line design, substation design, civil/structural) (EUADAKAG), Building Management & Facility Control Systems (BMS/BAS, Power Monitoring, EPMS) (EUAEAFAJ)

Keywords

• Mechanical engineering consulting
• Electrical engineering services
• Building systems design
• HVAC engineering design
• Fire protection engineering

Headquarters

HQ city

London

HQ country

Canada

HQ region

North America

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Others

Revenue model

1. Engineering Consulting and Design Services: Professional engineering consulting fees for mechanical and electrical engineering services on building projects. Revenue is project-based, billed as consulting engineering services for new construction, renovations, retrofits, and specialized testing services across residential, commercial, industrial, institutional, municipal, healthcare, and other building sectors.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels6 records

Core offering

Callidus Engineering is a professional mechanical and electrical (MEP) engineering consulting firm that designs the building systems — HVAC, electrical distribution, plumbing, fire protection, life safety, communications, and special systems — behind new construction, renovations, and retrofits. The firm sells its services directly to developers, architects, property managers, municipalities, healthcare institutions, and industrial owners across Ontario, supplemented by energy modeling, ULC S1001 integrated systems testing, and specialized services such as healthcare diagnostic imaging suite engineering and northern-climate (North of 60°) design.

Product overview

Callidus Engineering is a professional mechanical and electrical (M&E) engineering firm providing consulting services across Ontario, Canada. The company operates as a single integrated service offering rather than a modular software platform. Their portfolio consists of six interconnected service areas: Electrical Systems Design (power distribution, fire alarms, emergency power), Mechanical Systems Design (HVAC, plumbing, hydronic systems), Energy Modeling (physics-based simulation for compliance and optimization), Life Safety Systems (fire protection, sprinklers), Special Systems (medical gas, kitchen hoods, northern climate design), and Integrated Systems Testing (ULC-certified testing for building code compliance). Projects span multiple sectors including residential, commercial, healthcare, industrial, institutional, municipal, transportation, hospitality, and educational buildings.

Differentiator

Problem solved

Functional benefit

Quantifiable outcome

• Over 8,000 projects delivered across Canada since 2005
• +3 more outcomes

Named customers15 records

Segments10 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Scale indicators5 records

Recent moves8 records

Expansion highlights5 records

Broad incumbents

• WSP Global: Global engineering professional services firm with substantial Canadian MEP and building services practice. Overlaps with Callidus on the building services/MEP side but operates at vastly larger scale with multi-discipline portfolio.
• Arup: Global engineering consulting firm with a strong building MEP practice in Canada. Comparable in MEP consulting services and project types, though operates at multinational scale with broader sector coverage.
• Stantec: Major Canadian-headquartered global engineering firm with MEP and building engineering practice. Comparable on the building services dimension but operates as a broad incumbent across many disciplines and geographies.
• AtkinsRéalis: Canadian-headquartered global engineering services firm with building MEP and infrastructure capabilities. Comparable to Callidus on engineering consulting scope but at much larger scale and broader portfolio.

Direct peers

• Smith + Andersen: Canadian mechanical and electrical engineering consulting firm with deep Ontario presence across multiple offices. Directly comparable: same MEP consulting focus, similar building-sector project mix, and cross-provincial licensing. Frequently competes for the same healthcare, institutional, and commercial projects as Callidus.
• The HIDI Group: Toronto-based MEP engineering consulting firm serving commercial, institutional, healthcare, and residential clients. Comparable to Callidus in service scope (mechanical, electrical, plumbing, fire protection), target market, and Ontario-centric footprint.
• TMP Consulting Engineers: Ontario-based mechanical and electrical engineering firm with offices across the province. Directly comparable: same MEP consulting model, similar building-sector coverage (residential, commercial, institutional, healthcare), and competing with Callidus for the same public and private sector work.
• Crossey Engineering: Toronto-based MEP engineering consulting firm with a long-standing presence in Ontario. Comparable to Callidus in service lines (mechanical, electrical, fire protection) and target clients (developers, architects, institutional owners) across the same regional market.
• MCW Hemisphere: Canadian mechanical and electrical engineering consulting firm with offices in multiple provinces. Comparable to Callidus in MEP consulting focus, multi-disciplinary engineering, and healthcare/industrial project experience.

Regional players

• R.V. Anderson Associates: Ontario-headquartered engineering firm with strong municipal infrastructure focus. Comparable to Callidus in municipal and institutional client work and Ontario footprint, though heavier on civil/water versus building MEP.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/CallidusEngineeringFirm
• Xx.com/calliduseng
• LinkedInlinkedin.com/company/callidus-engineering

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Callidus Engineering