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GA
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GDI Ainsworth

Building Systems Engineer

Mississauga, ON, Canada

$90,000 to $110,000 CAD / year · Full-time

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Job details

Pay: $90,000 to $110,000 CAD / year
Job type: Full-time
Apply by: Dec 6, 2026
Posting language: English
Posted: Nov 6, 2026

Original job description

If you thrive in a team-oriented workplace that challenges your skills, to drive your career development, embraces diversity and rewards innovation, with competitive pay and great employee programs, join the GDI Ainsworth team today!

Job Summary:

The Building Systems Engineer optimizes HVAC and mechanical building systems through data analytics to improve performance, sustainability, and energy efficiency.

Key Responsibilities:

Provide data-driven analysis, ongoing commissioning, and HVAC system optimization across building portfolios.
Optimize chiller and boiler plant operations through improved control strategies.
Investigate equipment performance issues, identify abnormal usage, and resolve faults and unstable operating conditions.
Clearly communicate technical findings, recommendations, and solutions to clients and internal teams.
Collaborate with BAS technicians and third-party partners to support data-driven maintenance and system improvements.
Provide consulting services and identify business development opportunities within the existing client base.
Perform other duties as assigned.

Qualifications:

Degree in Mechanical Engineering or a related discipline.
Experience in building recommissioning, BAS programming, or energy management.
Strong knowledge of thermodynamics and energy-efficiency principles.
Ability to interpret wiring diagrams and mechanical drawings.
Strong communication, innovation, relationship-building, and interpersonal skills.
Valid driver’s license with a clean driving record and the ability to travel.
Professional Engineer (P.Eng.) designation is considered an asset.

The pay range is $90,000.00 to $110,00.00 per year. Actual salaries will vary based on factors such as education, experience, knowledge, skills, and abilities, as well as alignment with market data. The base salary is just one component of Ainsworth’s total compensation package, which also includes additional rewards and benefits such as short-term incentives and health insurance, among others.

This posting is for an active and current vacancy; interested applicants are encouraged to apply as soon as possible.

Why work at GDI Ainsworth?

GDI Ainsworth is growing at an unprecedented rate and to help attract and retain top talent, we provide benefits on your first day with us. We offer a wide variety of benefits including the following:

Benefits: Comprehensive health, dental and medical benefits, including wellness supports, RSP matching and generous vacation

Rewards: Service milestones and peer recognition plus Employee Discounts and Incentives

Flexibility: Hybrid working models, where applicable

Diversity: An inclusive organization that embraces diversity and belonging; work in a great team atmosphere with future potential for promotion within company

While we appreciate all applications we receive, we advise that only candidates under consideration will be contacted.

GDI Ainsworth is committed to building a diverse and inclusive workplace. Qualified designated group members are encouraged to apply as any reasonable accommodation of qualifications will be considered as per our Accommodation Policy, available upon request.

GDI Ainsworth is an integrated multi-trade company, offering end-to-end services and solutions for all asset maintenance and refurbishment requirements of our customers. We are continually striving to create better and more advanced products as well as provide the highest quality service. We are rapidly growing and need talented professionals to help drive our vision at becoming the best multi-trade company in the country! Join us…. Make a difference.

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More about this job

Responsibilities

Analyze and optimize HVAC and mechanical building systems across building portfolios, including chiller and boiler plants, using data-driven methods to improve performance, sustainability, and energy efficiency. Investigate equipment issues, communicate findings and recommendations, collaborate with BAS technicians and partners, and provide consulting and business development support to clients.

Requirements

A degree in Mechanical Engineering or a related discipline is required, along with experience in building recommissioning, BAS programming, or energy management and strong knowledge of thermodynamics and energy efficiency. Candidates should be able to interpret wiring diagrams and mechanical drawings, communicate and build relationships effectively, hold a valid driver’s license with a clean record, and be able to travel; a P.Eng. designation is an asset.

Skills

HVAC System Optimization
Building Systems Analytics
Ongoing Commissioning
Chiller Plant Operations
Boiler Plant Operations
Control Strategy Optimization
Equipment Performance Troubleshooting
Fault Diagnosis
Energy Management
Building Automation Systems
BAS Programming
Thermodynamics
Energy Efficiency
Wiring Diagram Interpretation
Mechanical Drawing Interpretation
Client Communication

Benefits

Health Insurance
Dental Benefits
Medical Benefits
Wellness Supports
Retirement Savings Plan Matching
Vacation
Short-Term Incentives
Service Milestone Rewards
Peer Recognition
Employee Discounts
Employee Incentives
Hybrid Working Models

Visa sponsorship

Not detected in the job text

Keywords

HVAC
Mechanical Building Systems
Data Analytics
Ongoing Commissioning
Building Recommissioning
Building Automation Systems
BAS Programming
Energy Management
Chiller Plants
Boiler Plants
Control Strategies
Equipment Performance
Fault Diagnosis
Thermodynamics
Energy Efficiency
Sustainability
Wiring Diagrams
Mechanical Drawings
Mechanical Engineering
Professional Engineer (P.Eng.)
Facilities Services
Building Portfolios
Data-Driven Maintenance
Consulting
Business Development

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