{"id":3974242,"url":"https://alion.io/job/tatham-engineering-lead-mechanical-engineer-building-services","title":"Lead Mechanical Engineer - Building Services","company":{"id":4423667,"name":"Tatham Engineering","domain":"tathameng.com","url":"https://alion.io/company/tathameng","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Dayforce","truth_index":{"grade":"C","score":60,"open_postings":12,"ghost_share":0.667,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-11-09T06:03:00Z"}},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":"lead","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Barrie, Canada","Guelph, Canada","Melbourne, Australia"],"countries":["CA","AU"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AutoCAD","optional":false},{"name":"Microsoft Office","optional":false}],"status":"live","first_seen_at":"2026-11-09T05:00:00Z","employer_posted_date":"2026-11-09","last_verified_at":"2026-11-09T17:23:59Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"We are seeking a Lead Mechanical Engineer to lead the design and execution of complex projects across the Commercial, Institutional, Industrial, and Municipal sectors. This role requires technical expertise in HVAC, domestic water, sanitary and storm drainage, building automation, and fire protection systems.\nThe ideal candidate will balance technical design with project management and the mentorship of junior staff. There is significant potential to evolve into a business development-focused role, increasing your client-facing presence and helping shape the firm's growth and partnerships. \nThis position can be based out of our Collingwood, Barrie or Guelph office.\nKey Responsibilities\nPrepare mechanical engineering designs and provide support to technicians and other staff;\nPrepare design calculations in accordance with codes and published standards;\nPrepare and review specifications and construction contract documents;\nUtilize software including AutoCAD or REVIT as a tool to complete design work;\nDelegation of tasks to staff and review of work completed by staff;\nAssist to mentor and develop junior staff\nBuild relationships with existing clients, potential clients, agencies, contractors and suppliers;\nIdentify project opportunities in existing and new project areas\nKey Position Requirements\nP.Eng. in the province of Ontario, registered with PEO\nDegree in Mechanical Engineering or related discipline\nMinimum of 10 years of mechanical engineering experience in the consulting industry\nWorking knowledge of the Ontario Building Code, and associated standards including ASHRAE, CSA and NFPA. \nDetailed engineering experience with mechanical systems including preparation of calculations and reports, equipment selection, and design of HVAC, plumbing, fire protection, and building automation systems.\nExperience preparing specifications for equipment and associated systems\nProficiency in AutoCAD software\nFull knowledge of Microsoft Office Suite\nExperience with REVIT would be an asset\nExperience with decarbonization and energy efficiency retrofits would be an asset\nExperience with business development would be an asset\nStrong communication and interpersonal skills\nExcellent technical and analytical skills\nEnthusiasm to work in a team structure and a willingness to guide, help and collaborate with 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