AECOM is actively seeking a Principal Engineer- Tunnel Practice for immediate employment in Markham, Ontario or Mississauga, Ontario, Canada. The responsibilities of this position include, but are not limited to: • This role will function as a Deputy Design Manager, supporting the Design Manager in the planning, coordination, and delivery of multidisciplinary design packages for a deep sanitary sewer tunnel system within a dense urban corridor. • The position is suited to a technically strong engineer with proven experience in design delivery, coordination, and risk management for major municipal infrastructure programs. • Familiarity with water and wastewater design standards in the Region of Peel, City of Toronto, York Region, and Halton Region is considered an asset. • Coordinate multidisciplinary design inputs, including tunnelling, geotechnical, hydrogeological, structural, civil, utilities, hydraulic, traffic, environmental, procurement, cost, and schedule disciplines. • Lead and independently organize work plans, design tasks, and deliverables for medium- to high-complexity tunneling and underground projects. • Provide expert guidance in soil mechanics, rock mechanics, and ground-structure interaction to multidisciplinary project teams. • Contribute geotechnical and structural expertise for underground components on major water conveyance projects, including long microtunnels drives and deep shafts. • Provide technical input for tunnel and shafts design methodologies, means and methods, and proposal development. • Design tunnels using MTBM and SEM/NATM. • Design SOE systems for deep shafts, pump stations, portals, cut-and-cover structures, and deep excavations. • Participate in constructability reviews, value engineering workshops, and risk management activities. • Prepare contract documents, design reports, technical specifications, and drawing packages. • Review and supervise the work of intermediate engineers and mentor interns, especially on numerical modelling tasks. • Collaborate closely with internal disciplines, external partners, and clients to support successful project delivery. • Contribute to the development and continuous improvement of AECOM's tunneling standards, tools, and best practices. Qualifications Minimum Requirements • BA/BS + 6 years or more of relevant experience or demonstrated equivalency of experience and/or education. • Hold a P.Eng. in ON or have the ability to obtain it within one year from starting of employment. Preferred Qualifications • 6+ years of experience in tunnels and microtunnels design, deep shafts, underground structures, and geotechnical/structural analysis for major infrastructure programs (highly preferred). • 6 years of experience with design management of water conveyance tunneling projects. • Strong technical capabilities in underground design and numerical analysis. • Master's Degree in Geotechnical or Structural Engineering. • Experience with design management of water conveyance projects. • Experience with both large-diameter (5m+) tunneling and trenchless technologies. • Technical expertise in TBM tunneling, SEM/NATM, shaft design, ground improvement, and deep excavation support systems. • Strong knowledge of geology, hydrogeology, rock mechanics, and ground behavior. • Proficiency in analytical and numerical methods for underground works, including 2D/3D modelling. • Ability to work independently and make informed technical decisions with minimal supervision. • Excellent written and verbal communication skills, including the ability to present technical concepts clearly. • Strong teamwork, coordination, and client-facing skills. Additional Information AECOM is proud to offer comprehensive benefits to meet the diverse needs of our employees. Depending on your employment status, AECOM benefits may include medical, dental, vision, life, AD&D, disability benefits, paid time off, leaves of absences, voluntary benefits, perks, flexible work options, well-being resources, employee assistance program, business travel insurance, service recognition awards, retirement savings plan, and employee stock purchase plan.