We are the Callidus Engineering team. We make buildings work!
You’ve built your career solving complex mechanical challenges, delivering high-quality designs, and ensuring projects meet the highest standards in the communities where people live and work. You deserve a role where your expertise is respected, your input makes a difference, and your projects support environments that truly matter.
At Callidus Engineering, you’ll work on a wide range of multi-unit residential developments—from new mid-rise and high-rise buildings to major system upgrades in existing condominiums and co-ops—designing systems that keep residents safe, comfortable, and energy efficient.
If you have 10+ years of experience in Building Services, particularly in the multi-unit residential sector, this is your opportunity to take the next step in your career. This position is based in our London, Kignston, or Kitchener office.
At Callidus Engineering, your contributions matter. Your insight shapes both our designs and the lives of the people who live in them. You’ll be part of a team that values community, ambition, and integrity, where professional growth is supported, and technical excellence is the standard.

What You Can Expect

• Competitive wages that recognize your expertise
• A strong benefits package to support you and your family
• Incentive compensation tied to company performance

Learn more about what it’s like to work with us: https://callidus.ca/work-at-callidus/

Your Role Includes

• Reviewing and stamping mechanical projects of all complexities and sizes
• Directing design strategies and concepts on complex projects
• Providing technical expertise within the mechanical team
• Leading audits, feasibility assessments, and investigations, and writing corresponding reports
• Mentoring intermediate and junior-level engineers and designers
• Troubleshooting construction issues and collaborating on solutions
• Communicating with clients, contractors, and sales reps, preparing project documentation, and coordinating with other engineering disciplines
• Conducting site visits, reviews, and construction phase services

What You Bring to the Team

• Design experience with central plant systems, including hot water, steam, and chilled water systems
• Significant exposure to DDC control systems, including writing sequences of operations, specifications, and troubleshooting on-site control issues
• Extensive knowledge of codes and standards, including OBC, ASHRAE, CSA, and ASPE standards
• Design experience across multiple industries, including commercial, industrial, educational, multi-unit residential, healthcare, and government
• Excellent communication skills and a proactive approach to problem-solving
• The ability to organize, multitask, and work well under deadlines
• A collaborative mindset and a willingness to share ideas
• A track record of sound judgment and decision-making

Your Background & Qualifications

• Professional engineering license in Ontario with 10+ years of design experience in the building construction industry and at least 5 years in Canada
• Extensive design experience in multi-unit residential projects
• An effective communicator who thrives in a team setting
• Strong technical skills with a focus on delivering high-quality work
• A desire to contribute to a collaborative and professional environment

• Reviewing and stamping mechanical projects of all complexities and sizes
• Directing design strategies and concepts on complex projects
• Providing technical expertise within the mechanical team
• Leading audits, feasibility assessments, and investigations, and writing corresponding reports
• Mentoring intermediate and junior-level engineers and designers
• Troubleshooting construction issues and collaborating on solutions
• Communicating with clients, contractors, and sales reps, preparing project documentation, and coordinating with other engineering disciplines
• Conducting site visits, reviews, and construction phase service