Senior Geotechnical Engineer

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.

If you share that vision, even if you don’t meet every requirement listed, we’d still love to hear from you. We value potential and diverse perspectives as much as experience. Let’s explore how we can support your growth and help you take the next step in your career, while contributing to an exciting new chapter for Mott MacDonald in North America.

We are looking to appoint a Senior Geotechnical Engineer to strengthen our geotechnical capability across major infrastructure programs in the Pacific Northwest. This role sits within our Ground Engineering team, supporting both design delivery and owner’s advisory work on complex, large-scale transportation and civil infrastructure projects.

Based in Seattle (hybrid), this is a senior, client-facing position suited to someone with strong technical depth and established experience delivering across Washington and/or Oregon. The role also includes line management and mentorship responsibilities, with a clear pathway toward progression to Principal level.

You will play a central role in delivering major underground and surface infrastructure, spanning both technical design and advisory scopes. This includes working alongside owner organizations as an embedded advisor, supporting the delivery of complex programs involving tunnels, underground stations, elevated structures, and at-grade assets in challenging ground conditions.

Alongside advisory responsibilities, you will contribute to a broader portfolio of geotechnical design work, collaborating across multidisciplinary teams to develop practical, high-quality engineering solutions. The role offers exposure to long-term regional programs and complex, multi-package delivery environments, combining hands-on technical input with strategic project support.

Candidate Profile

Benefits & Reward

At Mott MacDonald, our employees have a stake and a voice in our business, providing them with a direct connection to our success through our personal and group performance bonuses. We provide a comprehensive benefit package that includes 401k, medical, dental and vision insurance, short-term/long-term disability, paid holidays, PTO, parental leave, and company paid life insurance.

Individual pay is determined based on several factors such as work location, education, experience, and unique skills.

The expected salary for this position is $148,000 - $181,000

Collaboration at Our Core At Mott MacDonald, we believe great ideas happen when we’re together. Our hybrid approach centers on an in-office culture, with most of your time spent collaborating face-to-face and a minimum of three days per week in the office. We balance flexibility with connection, so you and your manager can choose how to meet client, team, and personal commitments.

Equal opportunity is the law.

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.

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, age, protected veteran status, creed, marital status, sexual orientation, gender identity, citizenship status or disability status.