New

Environmental Principal

Apex Companies, LLC

$130,000—$170,000

tuition assistance, 401(k)

United States, California, Signal Hill

1962 Freeman Avenue (Show on map)

Sep 18, 2026

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 a national leader in water resources, environmental services, engineering, health & safety, and ESG consulting. With a strong presence across the United States, we deliver innovative, practical, and sustainable solutions to clients across a diverse range of industries.

We are seeking a dynamic, growth-oriented leader to join our team as an Environmental Principal. This hybrid position may be based in Thousand Oaks, Pleasant Hill, or Signal Hill, California.

The Role

As an Environmental Principal, you will serve as a senior technical advisor and trusted thought leader, helping clients navigate complex environmental challenges and develop strategic, high-value solutions. This role combines deep technical expertise with business leadership and is focused on advancing Apex's environmental practice through technical excellence, client development, and team growth. You will play a key role in mentoring staff, expanding client relationships, and driving the continued success and growth of the environmental services team.
Key Responsibilities:

Maintain and expand long-term client relationships, acting as a trusted advisor.
Provide subject matter expertise (SME), lead QA/QC efforts, and mentor project teams to promote technical excellence and high performance.
Manage project performance with a focus on quality, innovation, and client satisfaction.
Travel to client locations as needed for meetings and project development.

What we are looking for:

10+ years of environmental consulting or industry experience with progressive responsibility and leadership.
BS in Geology or Engineering, Hydrogeology, Environmental Science, or other related field. Master's degree is preferred.
Licensure as Professional Geologist or Engineer.
Established client relationships and an active network within the region or with national clients.
Strong technical background in one or more of the core disciplines: Environmental Compliance, Site Investigation/Remediation, Site Development Permitting, EHS, or Due Diligence.
Exceptional communication, negotiation, and presentation skills for engaging with senior-level clients, regulators, and stakeholders.
Deep understanding of your region's regulatory and business environment.
Ability to mentor and train staff.
Strong technical writing and communication skills.
Strong safety awareness and a good record and understanding of safe work practices.
40-hour HAZWOPER certification.

Why you'll love working for us:

Company-subsidized medical and dental.
Company-paid life, short, and long-term disability.
401k match, tuition assistance, and more.
Cross-training and the ability to work on a variety of projects.
Performance-based bonuses or other incentives.
Working with the best and brightest in the industry.
2,000+ employee national firm with 70+ locations across the US.

Apex Job Title: Scientist 6 - Principal Scientist

Req ID: 12120

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Annual Expected Pay Range

$130,000 — $170,000 USD

We believe in equality for all and celebrate the diversity and differences of our employees, customers, and communities. We do not discriminate based on gender, race or color, ethnicity or national origin, age, disability, religion, sexual orientation, gender identity or expression, veteran status, or any other applicable characteristics protected by law. Apex aims to make apexcos.com accessible to all users. If you have a disability or special need that requires accommodation to navigate our website or complete the application process, please contact Talent@apexcos.com or (301) 417-0200. Likewise, feel free to reach out to us if you would like to view or discuss Apex policy related to equal employment opportunity or have any related concerns. EO/AA/VEV/Disabled Employer

TO ALL RECRUITMENT AGENCIES: Apex Companies does not accept unsolicited agency resumes. Please do not forward resumes for any of our job postings to our career's sites, or to any employees of Apex Companies or affiliates. Apex Companies is not responsible for any fees related to unsolicited resumes.