Senior Technical Project Manager - Remediation

Are you driven to grow, lead, and make a meaningful impact? At Apex, we’re building more than a consulting and engineering firm—we’re creating a place where your career accelerates, your contributions matter, and your potential is fully realized. We believe your growth is our growth, which is why we invest in your development at every stage of your career. Here, you’ll work on projects that shape communities, protect the environment, and create lasting impact, all while being empowered with the autonomy and flexibility to do your best work.

Fueled by high-quality delivery, exceptional client retention, and strategic acquisitions, Apex Companies continues to rank among the fastest-growing firms in the AEC industry, recently recognized by the Zweig Group for our industry-leading growth. Our success is grounded in strong leadership, a collaborative culture, and a shared commitment to delivering exceptional outcomes. As we continue to expand, we're looking for high-performing professionals who are ready to lead, collaborate, innovate, and create impact.

At Apex, you help shape what's next. When we succeed together, we share in that success. All Apex positions are eligible for annual bonus opportunities, reinforcing our commitment to recognizing and rewarding meaningful contributions that drive our collective growth.

Apex Companies is seeking a dynamic and experienced Senior Technical Project Manager (PM) to join our growing team in Pleasant Hill, CA. This key leadership position will drive the successful delivery of complex environmental investigation, remediation, and compliance projects involving soil, groundwater, sediment, soil vapor, surface water, and other environmental media. The role requires strong technical leadership, exceptional client management skills, and a proven ability to mentor staff, manage project execution, and support business growth.

Experience with industrial, manufacturing, petroleum, government, and brownfield remediation programs is highly desirable.

• Manage large-scale environmental investigation, remediation, and compliance projects from proposal through closure.
• Develop project scopes, schedules, budgets, work plans, and health and safety plans.
• Lead multidisciplinary teams of geologists, engineers, hydro geologists, risk assessors, and environmental scientists.
• Monitor project financial performance, including revenue, profitability, utilization, and forecasting.
• Coordinate subcontractors, laboratories, drilling contractors, and remediation vendors.
• Maintain quality assurance and quality control standards.

• Serve as a technical lead for sites impacted by a range of chemical and petroleum-related contaminants in soil, groundwater, sediment, soil vapor, surface water, and other environmental media.
• Design and oversee:
• Site investigations and environmental assessments
• Soil and groundwater characterization
• Soil vapor and vapor intrusion assessments
• Human health and ecological risk assessments
• Remedial investigations/feasibility studies (RI/FS)
• Corrective action and site closure programs
• Evaluate and implement appropriate remediation approaches and technologies based on site conditions, regulatory requirements, and project objectives.
• Interpret environmental data, evaluate remedial alternatives, and develop practical recommendations for investigation, remediation, and long-term site management.

• Act as primary client contact for key accounts.
• Support strategic planning with industrial, manufacturing, petroleum, commercial, and government clients.
• Prepare and present technical findings to clients, regulators, and stakeholders.
• Maintain long-term client…