Senior​/Principal GeoEnvironmental Engineer

Overview

Do you want to build an impactful career to change the world for the better?

Geosyntec has an exciting opportunity for a Senior/Principal Geo Environmental Engineer to join and help grow our solid waste engineering practice in Southern California
, with flexibility to sit in San Diego, Los Angeles, Long Beach, Costa Mesa, Arcadia, or Santa Barbara. This position is well suited for a highly experienced engineer and consultant who will apply their expertise to projects involving landfills, landfill expansions, closures and post‑closure monitoring, transfer stations, surface impoundments, geologic and hydrogeologic investigations, solid waste planning, litigation support, and other solid waste management systems.

We are looking for someone with proven business development and client engagement abilities, paired with strong technical expertise to further build our practice. The position involves leading and delivering technically challenging projects, supporting client development and proposal efforts, and collaborating with multidisciplinary teams through planning, design, permitting, construction, and ongoing performance evaluation. This role offers the opportunity to help expand a high‑impact practice while working alongside recognized leaders in the industry.

Geosyntec is an innovative, international engineering and consulting firm serving private and public‑sector clients to address new ventures and complex problems involving our environment, natural resources, and civil infrastructure. Our engineers, scientists, technical and project employees serve our clients from offices across the world. Ranked by ENR as one of the top environmental engineering design firms, Geosyntec is internationally known for its technical leadership, broad experience, and exceptional client service.

We invest in our people. Each employee is unique, and your career at Geosyntec will be too. We offer competitive pay and benefits, and well‑being programs to support you and your family.

This position is a senior‑level role involving technical leadership, project delivery, client service, and practice growth responsibilities across solid waste engineering and consulting assignments, including:

• Lead and manage complex solid waste engineering and consulting projects involving landfills, expansions, closures, post‑closure care and monitoring, transfer stations, surface impoundments, and related solid waste management systems.
• Serve as a trusted advisor to clients by providing strategic technical guidance, responsive consulting support, and practical solutions to challenging solid waste engineering, operational, permitting, and compliance issues.
• Support practice growth through business development, client relationship management, networking, marketing activities, and preparation of technical and commercial proposals for new and existing solid waste clients.
• Oversee project execution from investigation and planning through permitting, design, construction, operations support, closure, and post‑closure monitoring, including scope development, budgeting, scheduling, risk management, and coordination of subcontractors and multidisciplinary teams.
• Provide senior technical input and quality review for engineering evaluations, design documents, calculations, reports, permit applications, specifications, construction documents, and compliance‑related submittals associated with solid waste facilities.
• Lead or support geologic and hydrogeologic investigations, site evaluations, monitoring programs, and interpretation of subsurface and environmental data to inform design, permitting, and operational decision‑making.
• Support solid waste planning efforts, regulatory strategy, due diligence, and litigation support assignments by preparing or reviewing technical analyses, expert materials, and defensible engineering documentation.
• Mentor and support staff in technical problem‑solving, project execution, client interaction, and professional development within the solid waste engineering practice.
• Travel to client, project, and office locations as needed to support field investigations, design reviews,…