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Apex Companies

National environmental consulting and engineering firm

Environmental Scientist Project Manager

Full-Time
$104k - $146k/yr+ Annual Bonus
Expert
Bachelor's, Master's, PhD
Fullerton, CA, USA
In Person
Architecture & Civil EngineeringEnvironmental Engineering

About the job

Requirements
  • A bachelor's degree in Environmental Science, Civil Engineering, Environmental Engineering, or a related field is required.
  • At least 10 years of professional work experience is required.
  • Knowledge of stormwater permitting and planning, water quality monitoring, best management practices, and environmental compliance inspections is required.
  • CPSWQ or CPESC certification is required.
  • QSD or QSP and QISP certifications are required.
  • Ability to read, interpret, and analyze plans, technical manuals, and permits is required.
  • Ability to perform quality assurance and quality control on work products is required.
  • Proficiency in Microsoft Office Suite is required.
  • Ability to kneel, climb, and lift up to 50 pounds is required.
  • A valid California driver's license and insurable driving record are required.
Responsibilities
  • Manage municipal, utility, industrial, and commercial clients' stormwater planning and compliance efforts for Phase I and II Municipal Separate Storm Sewer System permits, the Construction General Permit, and the Industrial General Permit.
  • Interpret complex regulatory permits and formulate compliance strategies; assist clients with regulatory compliance.
  • Prepare comprehensive approaches, work plans, technical reports, and documents, including watershed management plans, stormwater management plans, annual reports, non-stormwater discharge source assessments, adaptive management plans, compliance guidance documents, compliance reports, rain and sampling event summary reports, stormwater pollution prevention plans, and water quality management plans.
  • Execute and manage field investigations, including mobilization and demobilization decisions.
  • Manage the workload of other Environmental Scientist staff.
  • Prepare and monitor project budgets.
  • Meet with clients about work, team performance, and current and future work.
  • Perform construction-site and facility environmental compliance inspections, including QSP, QISP, and FOG inspections.
  • Conduct environmental sampling, testing, and observations, primarily for surface water, stormwater, groundwater, and wastewater, as well as soils and sediments.
  • Make field observations and perform data measurement and collection assignments.
  • Manage and analyze data through compilation, manipulation, and evaluation.
  • Develop and implement monitoring and reporting plans and field studies.
  • Perform regulatory and water quality data analyses.
  • Participate in and lead technical presentations.
Desired Qualifications
  • A master's or PhD in Environmental Science, Civil Engineering, Environmental Engineering, or a related field is preferred.
  • Proficiency with ArcGIS is preferred.
  • OSHA 40-hour HAZWOPER training is preferred.
  • Ability to perform maintenance and calibration of environmental monitoring instruments, meters, probes, and automated sampling equipment 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

6 month growth

22%

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.