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Mott MacDonald • Toronto, ON, CA

Principal Tunnel Engineer

Employment type:  Full time
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Job Description

At Mott MacDonald, we trust our brilliant people to do brilliant things in engineering, management, and development services, supporting multisector project work in over 150 countries. As one of the largest employee-owned companies in the world, we pride ourselves on our ability to deliver exceptional outcomes through our network of 20,000+ talented consultants. With sustainability and innovation at the heart of all our sectors in North America, including, Buildings, Energy, Transportation, and Water.

We believe in empowering our people to excel, learn, and grow, offering diverse opportunities to contribute to career-defining work. Join us and be part of a collaborative environment where your ambitions are united with ours, and you can truly shape your story.

We are looking for a talented, motivated, and experienced Principal Tunnel Engineer to support our Toronto tunnels team. In this position you will work alongside our geotechnical and structural engineers on local, national and global projects.


As a Principal Tunnel Engineer, your responsibilities will include:


  • Developing design solutions and associated deliverables by drawing on deep knowledge of a broad range of geotechnical and structural skills, including: tunnel, shaft, support of excavation, and underground structure design;
  • Providing technical guidance and leadership in the development of technical solutions for underground projects, particularly those in the water / wastewater and transit markets;
  • Providing constructability and biddability reviews;
  • Delivery of packages of design work including writing reports and specifications;
  • Providing leadership on matters of underground engineering practice, including codes and standards, calculations, and construction drawings. Establishing processes, procedures and systems to enable the team’s efficient production of consistent and high-quality deliverables;
  • Project Management or design package management including collaboration with external and internal stakeholders, quality control, and management of inputs from other team members;
  • Liaising with the client, attending progress meetings and producing reports on progress;
  • Advancing the team’s capability by advancing technical excellence and digital innovation;
  • Supervising the work of more junior staff and providing technical and professional guidance to aid their development; and
  • Supporting the company in winning future projects through business development efforts and proposal delivery.

The right candidate is a versatile and creative thinker who can lead teams of engineers to provide practical solutions to complex problems.

The candidate must have the following experience:

  • A strong academic background, with a Bachelor’s degree in Civil Engineering, Geotechnical Engineering or Geological Engineering (a Master’s degree would be considered an asset)
  • At least 15 years of relevant project experience in Structural/Geotechnical engineering design & construction for tunnels, shafts and other underground structures (experience with water / wastewater projects in the GTHA and with tunnel design management would be considered an asset)
  • P.Eng. designation in Ontario is required (or is able to obtain it within short period of time)
  • Effective communication, interpersonal, and teamwork skills; able to collaborate effectively with all levels of staff and clients and nurture the development of junior staff
  • Advanced knowledge in developing innovative underground structure solutions using current design standards and guidelines
  • Capability or familiarity with numerical analysis software (geotechnical/structural)
  • Ability and enthusiasm for supervising the work of others, including check and approval of key deliverables

Our teams are comprised of bright and enthusiastic people who wish to make a difference to the world that we live in. If you share that vision and don’t have all the experience outlined in this posting, we still want to hear from you!

Let’s discuss how we can help you take the next step in your career and how you can participate in an exciting new chapter for Mott MacDonald in North America.

We are an equal opportunity employer and are committed to providing employment accommodation in accordance with the Ontario Human Rights Code and the Accessibility for Ontarians with Disabilities Act, 2005 (AODA). Mott MacDonald Canada Limited will provide accommodations to job applicants with disabilities throughout the recruitment process. If you require an accommodation, please notify us and we will work with you to meet your needs.

We seek to promote fair employment procedures and practices to ensure equal opportunities for all. We encourage individual expression in our workplace and are committed to creating an inclusive environment where everyone feels they have the opportunity to contribute.

Hybrid working policy

At Mott MacDonald, we believe it makes business sense for you and your manager to choose how you can work most effectively to meet your client, team, and personal commitments. We offer a hybrid working policy that embraces your well-being, flexibility, and trust.

Company benefits

Open to part-time employees
Open to part time work for some roles
Enhanced maternity leave – 26 weeks full pay
Adoption leave – 26 weeks full pay
Shared parental leave – We match up to 24 weeks full pay
Enhanced paternity leave – 2 weeks
Private GP service – Private Medical care for all UK staff
Life insurance – 4 x salary
Enhanced pension match/contribution – matched up to 7%
Buddy scheme
Enhanced sick pay
Dental coverage
Compassionate leave
Health assessment
Eye Care Support – Eyecare vouchers
Life assurance
Carer’s leave – up to 5 days, two of which are paid
Pregnancy loss leave
Salary sacrifice
Buy or sell annual leave
Accrued annual leave
Religious celebration leave
Tax-free childcare
Theme park discounts
On-site yoga classes
Cycle to work scheme
Faith rooms
Annual pay rises
Annual bonus
Income protection
Employee discounts
Professional subscriptions – We pay for your primary professional annual subscription
Lunch and learns
Employee assistance programme
L&D budget
Teambuilding days
Travel loan
Returnship
Mentoring
In house training
Study support
Learning platform
Further education support

Working at Mott MacDonald

Company employees

18,000 worldwide

Gender diversity (male:female)

65:35

Currently hiring in

Australia

Bulgaria

Canada

Czechia

France

Germany

Hong Kong

India

Ireland

Italy

Japan

Malaysia

Nepal

New Zealand

Qatar

Saudi Arabia

Serbia

Singapore

South Korea

Spain

Taiwan

Thailand

United Arab Emirates

United Kingdom

United States

Office Locations

Awards & Accreditations

2nd – Career Progression

2nd – Career Progression

Flexa awards 2025
3rd – Family Friendly

3rd – Family Friendly

Flexa awards 2025
Work-Life Balance

Work-Life Balance

Flexa awards 2025
Flexible

Flexible

Flexa awards 2025
Culture

Culture

Flexa awards 2025

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