Shaping a safe, sustainable,
and equitable future.

Award-Winning Engineering and Environmental Solutions

The Latest at Apex Companies

Rockville, MD—Apex Companies, LLC (Apex) today announced the acquisition of Storm Water Inspection & Maintenance...

What We Do

National Presence. Local Expertise.

Apex provides a broad range of consulting, engineering, and compliance services across water, environment, ESG and resiliency, health and safety, compliance and assurance, and infrastructure. Known for our technical excellence, commitment to quality, and reliable and agile operations, we consistently deliver high-impact results for our clients, and as a firm remain committed to the shaping of a safe, sustainable, and equitable future.


Years in Business


Locations Nationwide




Professionals Nationwide

Who We Are

We care. We collaborate. We deliver. We're inspiring others, making a difference, and building a better tomorrow. We are Apex.

Our Projects

Award-Winning Engineering and Environmental Consulting Services

Serving both public agencies and private sector clients, Apex provides turnkey environmental and engineering services. We apply the newest, most effective technologies; work to improve quality and reduce costs through innovative processes and management; and recommend clear, practical strategies to help you meet your business objectives.

Sectors We Serve

What Our Clients are Saying

“Apex’s stormwater expertise is top‑notch. Plus, they’re all the cliché things you want in your consultant—responsive, detail‑oriented, who provide great communication and think outside the box. One of Apex’s strong suits is stormwater. They manage our stormwater programs including our manuals, management plan, permitting, and corrective action. They really excel at it.”

Senior HSE Representative, Oil & Gas Client

“I’ve worked with global firms and they have all the problems—they’re cumbersome, hard to work with, and don’t always know us. Apex understands what we need and gives us a solution-oriented service. They get our end game and are very good at being a part of the team that helps us get there.”

Director of Environmental, Real Estate Firm

“Apex has done an outstanding job for us. In addition to their expertise in GHG inventory verification, they quickly understand the technical issues associated with our most complex energy uses. Everyone at our facilities enjoys working with them and we learn a tremendous amount.”

Global Aerospace Company

“No one else could meet all our company data needs and Apex has worked with us to customize ARTEMIS® as a great tool to use across our business units.”

Major Retail Company

“Apex completes the Phase I and Phase II assessments for us whenever we open a new location.”

Bank & Insurance Firm

“One of Apex’s strong suits is stormwater. They manage our stormwater programs, including our manuals, management plan, permitting, and corrective action. We will definitely see increased stormwater activity in the future and Apex will likely get that business.”

Environmental Coordinator, Oil & Gas

“Apex has been our outside auditors for our Environmental Compliance Audit program since 2016. They have been very professional and thorough. Apex has been very generous with their consulting support, and very flexible and very helpful with the initiation of virtual auditing.”

EHS Corporate Program Manager, Automotive Manufacturing Company

“Apex Companies has been providing stormwater management (SWM) facility inspection, maintenance and repair services to well over 600 SWM facilities. Apex has proven to be reliable, flexible, and knowledgeable regarding inspection, installation and repair of stormwater management facility infrastructure, stabilization of eroding embankments, forebay construction, pest control, removal of sediment/debris and undesirable plant species, and revegetation measures.”

Data Collection Manager, Department of Transportation

How Can We Help You Succeed?

Get in Touch With Us!


Apex Companies, LLC
2101 Gaither Rd, Suite 500
Rockville, MD 20850


Toll Free: (800) 733-2739
Tel: (301) 417-0200

Grow With Us

Exciting challenges and growth opportunities lie ahead.
Apply now and come grow with us!

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