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Apex Companies

National environmental consulting and engineering firm

Senior Technical Project Manager - Chlorinated Solvent Remediation

Full-Time
$175k - $200k/yr+ Annual bonus
Expert
Bachelor's
Pleasant Hill, CA, USA+2 moreMore locations: Thousand Oaks, CA, USA | Signal Hill, CA, USA
In Person
Architecture & Civil EngineeringEnvironmental Engineering

About the job

Requirements
  • A Bachelor of Science degree in Environmental Engineering, Civil Engineering, Geological Engineering, Hydrogeology, Geology, or a related field.
  • At least 12 years of environmental consulting experience.
  • At least 7 years managing complex remediation projects.
  • Demonstrated success managing projects exceeding $500,000 to $5 million or more annually.
  • Significant experience investigating and remediating chlorinated solvents.
Responsibilities
  • Manage large-scale environmental remediation projects from proposal through closure.
  • Develop project scopes, schedules, budgets, and health and safety plans.
  • Lead multidisciplinary teams of geologists, engineers, hydrogeologists, 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 PCE (tetrachloroethylene), TCE (trichloroethylene), cis-1,2-DCE, vinyl chloride, and other chlorinated volatile organic compounds.
  • Design and oversee site investigations, groundwater characterization, soil vapor intrusion assessments, human health and ecological risk assessments, remedial investigations and feasibility studies (RI/FS), and corrective action programs.
  • Evaluate and implement remediation technologies, including in situ chemical reduction (ISCR), in situ chemical oxidation (ISCO), enhanced reductive dechlorination (ERD), thermal remediation, soil vapor extraction (SVE), dual-phase extraction (DPE), air sparging, and monitored natural attenuation (MNA).
  • Act as the primary client contact for key accounts.
  • Support strategic planning with industrial, aerospace, petroleum, manufacturing, and government clients.
  • Prepare and present technical findings to clients, regulators, and stakeholders.
  • Maintain long-term client relationships while identifying opportunities for additional services.
  • Lead proposal preparation and pricing.
  • Support capture planning and opportunity pursuit.
  • Identify new clients and expand existing accounts.
  • Participate in industry organizations and conferences.
  • Work with EPA CERCLA/Superfund programs, RCRA Corrective Action, state cleanup programs, vapor intrusion guidance, UST and industrial facility closure programs, and California DTSC and Regional Water Board programs.
Desired Qualifications
  • Experience with large industrial, aerospace, manufacturing, military, and brownfield remediation programs is highly desirable.
  • A California PE, PG, CHG, PMP, REM, or CHMM credential is preferred.

About the company

Apex Companies provides environmental consulting and engineering services to public agencies and private clients across all 50 states. Its offerings include water resources management, environmental remediation, health and safety, compliance assurance, ESG advisory, and infrastructure engineering, delivering work from site assessments to managing complex projects. A key differentiator is the breadth of services across environmental, health and safety, and ESG, plus its ARTEMIS data-management platform that organizes environmental information for risk mitigation and lending. The company aims to help clients manage environmental risk, achieve regulatory compliance, and efficiently complete projects while expanding its national footprint.

Company Size

1,001-5,000

Company Stage

N/A

Total Funding

N/A

Headquarters

Rockville, Maryland

Founded

1988

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Simplify's Take

What believers are saying

  • Zweig named Apex a 2026 Hot Firm, ranking it No. 28.
  • March 2026 CWE acquisition expands California engineering reach and cross-sells immediately.
  • February 2026 Tully acquisition strengthens stormwater lifecycle services across Northern California projects.

What critics are saying

  • Rapid roll-up integration can dilute service quality and overload project managers by 2027.
  • The 2024 NRC report flagged a Severity III violation at Apex Companies.
  • PE ownership under Morgan Stanley Capital Partners pressures exits; stalled growth breaks the platform thesis.

What makes Apex Companies unique

  • Apex bundles water, environmental, and infrastructure work through one national platform.
  • ARTEMIS gives clients environmental data management and lending support across project lifecycles.
  • March 2026 CWE and Tully deals deepen California civil, water, and stormwater capabilities.

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Benefits

  • Health Insurance
  • Dental Insurance
  • Vision Insurance
  • Life Insurance
  • Disability Insurance
  • 401(k) Company Match
  • Paid Vacation
  • Paid Sick Leave
  • Relocation Assistance

Growth & Insights and Company News

Headcount

6 month growth

20%

1 year growth

20%

2 year growth

20%
Apex Companies
Mar 18th, 2026
Apex Companies Acquires CWE

Apex Companies announced the acquisition of CWE, an award-winning civil infrastructure, water resources, and environmental engineering services firm with multiple offices in California.

Associated Press
Feb 17th, 2026
Apex Companies Acquires Tully, Inc.

Adds to Core Stormwater Strength and Enhances Ability to Deliver the Full Stormwater Lifecycle in Northern California

EIN News
Jan 5th, 2026
Raincatcher Advises AquaWorks DBO on Its Acquisition by Apex Companies

Raincatcher, a national mergers and acquisitions advisory firm serving small to mid-size businesses, served as the exclusive sell-side advisor to AquaWorks DBO,

EIN News
Nov 3rd, 2025
Apex Companies Acquires Forsgren Associates, Inc.

Bolsters Engineering Depth and Extends Operational Presence in Intermountain West

EIN News
Nov 26th, 2024
Apex Acquires Weiler Engineering in Florida

Apex Companies, LLC has acquired Weiler Engineering Corporation, a Florida-based engineering firm. This acquisition enhances Apex's engineering capabilities and strengthens its presence in Florida. Weiler Engineering, with over 45 professionals, brings expertise in civil, structural, and utilities engineering. This move follows Apex's recent acquisitions of Johnson Engineering and Water Science Associates, further expanding its services in the municipal and private markets.