Building Science Engineer Jobs in Ontario (NOW HIRING)

Mechanical Engineer, Building Science - Richmond Hill

• Building Science- Existing buildings Retrofit & Capital Projects
• P.Eng. designation in Ontario, or actively working toward it
• Richmond Hill (relocating to Markham) | GTA-based projects
• Salary Range: $100,000 - $125,000, depending on experience
• Performance bonus - Benefits package

If you’re a Mechanical Engineer working in consulting and you’re ready to step into a role where you’re trusted to lead projects, work directly with clients, and grow into a leadership position, this opportunity is for you.

This is an opportunity to take on true project ownership; working directly with clients, leading building system upgrades, and playing a visible role in delivering high-impact retrofit and capital projects.

You’ll be involved from assessment and planning through to execution, with a clear path toward senior leadership as the team continues to grow.

Why Apply?

• Help build the mechanical practice.

• Work directly with a senior consultant during transition.

• Become the future mechanical lead.

• Opportunity to grow a department.

Brown & Beattie Ltd. is looking for a Mechanical Engineer with 7-10 years of experience in building systems who is ready to take on a high responsibility ownership, client-facing role focused on existing buildings, retrofits, and capital planning projects. If you do not currently hold a P.Eng. designation in Ontario, or are not located within commuting distance of the GTA, this role will not be the right fit.

What You’ll Be Doing

As a Mechanical Engineer, you will be responsible for assessment of existing building mechanical systems as well as design of replacement systems such as boilers, chillers, cooling towers, make-up air units and others. A working knowledge of building electrical systems as they pertain to mechanical systems and building mechanical equipment upgrades is a must.

Duties will include drafting specifications, construction review, progress reports, and client liaison. In this role you’ll manage a portfolio of projects with strong support and clear ownership. You will also be working directly with clients, contractors, and internal team members, so strong communication and organization skills are important. There will be opportunities to support and mentor junior staff as the team grows.

What Sets This Role Apart

This role offers a strong level of independence and ownership. You will be trusted to manage your own projects while working within a supportive and experienced team. There is a clear path to increased responsibility over time, including the opportunity to take on a leadership role within the mechanical discipline. The work is varied and practical, with a mix of office-based tasks, site visits, and client interaction.

Who This Role Is For

This role is best suited for a Mechanical Engineer with experience in building systems, particularly in retrofit, restoration, or consulting environments. You may currently be working at a consulting firm and looking for a role that offers more ownership, more direct client interaction, and long-term growth. You are comfortable working independently, managing multiple priorities, and taking accountability for your work.

Qualifications and Experience

• P.Eng. designation in Ontario, or actively working towards
• Bachelor’s Degree in Mechanical Engineering
• Approximately 6+ years of relevant experience
• Strong knowledge of building mechanical systems including HVAC, boilers, chillers, and ventilation
• Experience with residential high-rise or similar building types is preferred
• Working knowledge of electrical systems as they relate to mechanical upgrades is an asset
• Familiarity with Ontario Building Code and ASHRAE standards
• Experience with AutoCAD and/or Revit
• Background in building science, including BSS credential, is an asset but not required

Work Environment and Requirements

• Based in Richmond Hill, with a planned move to Markham later this year
• Projects located primarily throughout the GTA and Golden Horseshoe, with occasional travel across Ontario
• This role requires regular physical presence in the office and at project sites across the GTA and Ontario
• Must live within a reasonable commuting distance (approximately one hour)
• Valid G driver’s license and access to a reliable vehicle required
• Must be legally permitted to work in Ontario / Canada and able to provide proof if required
• Training and onboarding will be provided to support a successful transition into the role

About Brown & Beattie Ltd.

Brown & Beattie Ltd. is a building science engineering firm that works with building owners and managers on the evaluation, restoration, and long-term planning of building systems. The firm is known for its collaborative environment, technical expertise, and long-standing client relationships.