Callidus Engineering

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Callidus Engineering Experienced Engineers | Making Buildings Work Callidus Engineering is a professional engineering firm with offices located in London and Kingston, ON.

We provide mechanical and electrical engineering services to an ever expanding group of clients in Canada. Our mission is to provide an excellent engineering product coupled with exceptional customer service. The company goal is to develop and maintain a strong profile in the mechanical and electrical consulting engineering field. To this end, we are committed to the growth and development of our client base and to the personal growth and development of our staff. Drawing from experience working on a variety of project types and sizes, Callidus Engineering endeavours to provide each one of our clients with thorough investigation and thoughtful analysis of the existing conditions. Armed with this information and the valued input of the stake holders and facility personnel, building condition assessments are prepared and refined. Our services are characterized by a "Hands on" approach where the site investigator is also the report developer and cost estimator. The result is a technically superior analysis and an accurate opinion of costs. Callidus Engineering has a staff of over 30 full time employees, including administration. Callidus has 13 licensed engineers, with over 200 years of combined experience, and three additional designers working towards their engineering licences. Callidus Engineering is licensed to provide engineering services in: Manitoba, Alberta, British Columbia, Northwest Territories & Nunavut, Ontario, Newfoundland & Labrador and Saskatchewan.

There's a lot to celebrate when an existing building finds a new purpose, especially when that purpose makes a meaningfu...
10/20/2026

There's a lot to celebrate when an existing building finds a new purpose, especially when that purpose makes a meaningful difference in people's lives!

Last month, Kingston's 315 Queen Mary Road celebrated its grand opening, marking the transformation of a former long-term care home into a shared-care facility bringing transitional housing, health care and community support together under one roof.

The facility includes 33 transitional housing units operated by Home Base Housing, offering older adults who have experienced homelessness a place to find stability and support while working towards permanent housing. It's also home to the Midtown Kingston Health Home, operated by Kingston Community Health Centres, providing access to primary care for residents and the wider community.

Our team provided mechanical and electrical engineering for the renovation, tackling the challenges of adapting an aging building to meet the different operational needs and safety requirements of residential and clinical spaces.

Our own Derek Reid joined the grand opening celebrations alongside the City of Kingston, project partners and local service providers. By the time of the celebration, the transitional housing program had already welcomed 26 people, a wonderful reminder of the real impact behind the work.

It's rewarding to see an existing building begin such an important new chapter, and we're grateful to have played a part in bringing these much-needed services to our Kingston community!

Last week, our teams from London, Kitchener-Waterloo, and Kingston traded their usual routines for a full day together i...
10/01/2026

Last week, our teams from London, Kitchener-Waterloo, and Kingston traded their usual routines for a full day together in downtown Toronto.

We kicked things off with a Conundrum Outdoor Adventure that sent teams across the city to tackle a series of challenges, with new tasks appearing throughout the afternoon. It was a great excuse to mix up the usual groups, work with people we may not see every day, and have some fun along the way.

After all that time outside the team moved over to Toronto's BATL Grounds with axe throwing, archery, good food, and plenty more time to catch up. Later, we had an all hands presentation centred on one of our core values, We Pursue Better. Canadian Olympian and 11-time national boxing champion Mandy Bujold joined us as our guest speaker, sharing her perspective on perseverance, growth, and continuing to push for better.

With our team spread across three offices, getting this many people together in one place does not happen often. That made the day feel especially worthwhile, and gave everyone a chance to reconnect outside the usual calls, deadlines, and project work.

A new incoming water main, heavy-duty trench drainage, a new addressable fire alarm system and expanded emergency power ...
09/17/2026

A new incoming water main, heavy-duty trench drainage, a new addressable fire alarm system and expanded emergency power are all taking shape at Hayter’s Farm in Dashwood. Earlier this month, our team was back on site as Phase 2 of construction continued.

Our work also includes the building-side engineering that supports process systems, coordinating water, power, gas and other MEP requirements alongside plumbing, HVAC, fire protection and electrical design.

For more than 75 years, Hayter’s Farm has been part of the Dashwood community, today employing more than 150 people and supporting local health care, youth organizations and food banks. We’re proud to help create the infrastructure for their continued growth right here in Southwestern Ontario.

With the amount of school-related work we get to be part of, back-to-school season feels like a year-round event around ...
09/09/2026

With the amount of school-related work we get to be part of, back-to-school season feels like a year-round event around here. Our latest visit to St. Peter Catholic Elementary School in Tecumseh was a good reminder of why we enjoy this kind of work.

The school’s mechanical renewal is now visibly taking shape, with new boilers operational and major rooftop and domestic hot water equipment in place. Behind that progress is the less-visible challenge of fitting new systems into an existing building, working around the infrastructure already there and making sure the new mechanical equipment has the electrical support it needs.

We do a lot of this kind of work for school boards across Ontario, and that experience adds up. Every building comes with its own quirks, constraints and history, which is exactly what makes renewal work interesting. It is always satisfying to see a design move off the page and start becoming part of the school itself.

Construction is advancing on the Health Sciences Centre Nuclear Medicine CT Renewal in Winnipeg, where Callidus Engineer...
09/03/2026

Construction is advancing on the Health Sciences Centre Nuclear Medicine CT Renewal in Winnipeg, where Callidus Engineering Mechanical EIT Luke Reist recently visited the site to review progress.

The multi-phase renovation is supporting new SPECT and SPECT-CT imaging equipment while keeping nuclear medicine services operational throughout construction. Our mechanical and electrical design has been carefully sequenced so one scanning room can remain in service while another is renewed, with infection-control requirements, shutdown planning and connections to existing hospital systems all shaping the work.

Luke’s site review provided an opportunity to see how the design was taking shape within the constraints of the existing facility. Above the ceilings, ductwork, sprinkler piping, conduit and junction boxes compete for limited space, making coordination, equipment access and future serviceability important considerations as construction progresses.

It is detailed work in a demanding healthcare environment, and each completed phase brings HSC closer to renewed nuclear medicine spaces designed to support continued diagnostic imaging in Winnipeg.

Heat pumps are installed throughout one tower, the central hydronic system is circulating, and the make-up air unit and ...
08/18/2026

Heat pumps are installed throughout one tower, the central hydronic system is circulating, and the make-up air unit and fluid cooler have completed start-up. The emergency generator has also been load tested, with integrated systems testing completed in June.

These milestones were captured during our latest field review of this two-building, 322-unit residential development in London. Our mechanical and electrical scope includes HVAC, plumbing, fire protection, power distribution, emergency power, lighting, fire alarm, communications and access control.

With one tower nearing completion and work advancing through the second, the project is showing the level of coordination required to bring complex building systems from design through construction and into operation.

With eighth-floor precast set to begin, the building systems below are already moving quickly to keep pace. Sanitary and...
08/11/2026

With eighth-floor precast set to begin, the building systems below are already moving quickly to keep pace. Sanitary and storm risers are advancing upward, domestic water and hydronic piping are progressing through the building, and underground ductwork and make-up air risers are taking shape alongside the structure.

Our team was recently back on site at Tricar’s new 18-storey apartment development in London, where the mechanical and electrical systems we designed are moving deeper into construction. The development includes 145 residential suites and four levels of parking, supported by a central boiler and chiller plant, suite fan coil systems, fire protection and standpipe systems, emergency power, fire alarm, lighting, power distribution and communications infrastructure.

Our latest visit offered a good look at that coordination becoming physical. The chiller is now on site, standpipe risers have reached the upper levels, and electrical, lighting and fire alarm rough-ins are continuing through the parking levels, corridors and suites.

There is still plenty of construction ahead, but seeing a project of this scale rise floor by floor is a strong reminder of how much engineering has to come together for important projects like this to succeed.

The truth was out there, and last month our Kingston team went looking for it through Improbable Escapes’ Kingston Consp...
07/30/2026

The truth was out there, and last month our Kingston team went looking for it through Improbable Escapes’ Kingston Conspiracy.

Downtown Kingston became the setting for an extraterrestrial mystery as some of our Kingston team moved from landmark to landmark, decoding clues, comparing theories and putting their collective problem-solving skills to work. Every stage demanded close observation, clear communication and a little creative thinking.

The team cracked every riddle before time ran out and escaped with the truth intact. This outing brought everyone together outside the office for an afternoon of teamwork, friendly pressure and a very unconventional tour of Kingston’s beautiful downtown and waterfront.

No, Callidus Engineering has not rebranded. Our graphic designer is simply on vacation, and the rest of us were left uns...
07/23/2026

No, Callidus Engineering has not rebranded. Our graphic designer is simply on vacation, and the rest of us were left unsupervised.

Questionable graphic design choices aside, our mechanical and electrical engineering work continues as usual. Proper branding returns next week. Buildings still need to work in the meantime.

Our team was on site last month checking on the three 1,000 MBH boilers, two new domestic hot water storage tanks and a ...
07/21/2026

Our team was on site last month checking on the three 1,000 MBH boilers, two new domestic hot water storage tanks and a lead/lag control sequence are coming together inside Western University’s Bayfield Hall Residence. Our team designed the upgraded plant with dedicated circulation pumps, a digital thermostatic mixing valve and new powered venting, creating a coordinated system built around reliable domestic hot water delivery.

The real design challenge was keeping that hot water available while the old system made way for the new one. Construction was phased around an existing boiler providing temporary service as demolition, piping, venting, controls and electrical connections progressed around it.

Address

1385 North Routledge Park Unit 9
London, ON
N6H5N5

Opening Hours

Monday 8:30am - 5pm
Tuesday 8:30am - 5pm
Wednesday 8:30am - 5pm
Thursday 8:30am - 5pm
Friday 8:30am - 5pm

Telephone

+15194727640

Website

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