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Environmental Principal

Job in St. Louis, Saint Louis, St. Louis city, Missouri, 63105, USA
Listing for: ECS Midwest, LLC
Full Time position
Listed on 2026-01-12
Job specializations:
  • Engineering
    Environmental Engineer, Environmental Compliance, Environmental/ Urban Planning, Civil Engineering
Salary/Wage Range or Industry Benchmark: 80000 - 100000 USD Yearly USD 80000.00 100000.00 YEAR
Job Description & How to Apply Below
Location: St. Louis

Responsibilities

Engineering Consulting Services (ECS) is seeking an experienced Environmental Principal to join our team. This role ensures that overall goals related to quality and performance are achieved. Responsibilities for any one particular project are limited. The goal is to delegate to senior staff and step in when and where it is most useful. Principals are the problem solvers and the final reviewer for projects.

The ideal candidate presents a positive customer service attitude and understanding of ECS Core Values.

Key Responsibilities
  • Actively mentor junior staff and support overall development of the team. Provide mentorship to Associate Principals as assigned.
  • Attend project meetings and provide solutions to technical and administrative issues as necessary.
  • Market our services. Maintain and further develop the client database.
  • Oversee project budgets and review change orders and invoices. Assist with collections efforts.
  • Training and oversight of subordinate staff members.
  • Strong ability to prioritize tasks and meet project deadlines.
  • Oversee environmental projects. Assist junior staff with resolution of issues and training of field staff.
  • Oversee the preparation and review of proposals and change orders.
  • Oversee the preparation and review of environmental reports from junior staff.
  • Perform deliverable reviews in accordance with ECS Principal review policy.
  • Host or attend project discussions with clients, follow up on reports to determine if there are questions.
  • Assist senior staff with staffing decisions.
  • Manage asbestos, lead‑based paint, mold and indoor air quality assessments.
  • Supervise subordinate staff regarding work assignments to ensure properly trained and experienced personnel are assigned. Perform Principal oversight and review of projects in accordance with ECS Principal Policy. Ensure that deliverables are completed, and projects are closed out in accordance with ECS QA/QC policies and guidelines. Assist with client interaction/discussion regarding findings and conclusions of reports.
  • Extensive knowledge of federal, state and local environmental regulations and guidelines and their implications on findings and conclusions in studies.
  • Communicate with junior staff to direct field work performed by subcontractors and other ECS technicians and other field staff. Likely will require managing and/or performing multiple projects simultaneously.
  • Other duties as assigned.
Qualifications
  • Bachelor and/or Master of Science in Civil Engineering, Environmental Engineering, or other Engineering degree applicable to Environmental Consulting, Natural or Environmental Science, Geology, or other degree relevant to the practice of Environmental Consulting.
  • Minimum 12 years of related experience
    • 16 or more years of experience can meet education requirements.
  • Licensed as at least one of the following: PE, PG, REM, CIH, CHMM, PWS, CSP, LSS, CIE, REPA, or CEM.
  • Candidates must have achieved previous designation as Principal at ECS or hold similar designation from competitor firm.
Skills and Abilities
  • Extensive knowledge of environmental principles and applications. Excellent Client Manager.
  • Extensive knowledge of permitting processes, environmental regulations, and environmental test methods.
  • Review and provide feedback of field and laboratory testing by others. Perform training and/or corrective action as necessary.
  • Excellent ability to manage and develop new clients.
  • Demonstrate established technical excellence, strong leadership skills, and a dedication to continuous professional development for their benefit and for the advancement of their field.
  • Principals provide leadership both through their example and through mentorship of staff.
About Us

ECS Group of Companies (ECS) was founded in 1988 with the goal to raise the standards of professional engineering consulting. Today, we are a leader in geotechnical, construction materials, environmental and facilities consulting services. We are employee‑owned with more than 3,000 employees in 100+ offices and testing facilities coast to coast. ECS is currently ranked #66 in Engineering News‑Record's Top 500 Design Firms (April 2025), #148 in Engineering News‑Record's Top 200 Environmental Firms (October 2025) and #50 in Zweig Group's Hot Firm List (May 2025).

For additional information about ECS, visit:

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