Full-Time

Water Treatment Process Engineer

Updated on 8/18/2026

Apex Companies

Apex Companies

1,001-5,000 employees

National environmental consulting and engineering firm

Compensation Overview

$88k - $102k/yr

+ Annual bonus + $10,000 sign-on bonus

Remote in USA

Remote

Remote within the US, with at least monthly travel to offices or client sites in New England.

Bachelor's

Category
Process Engineering
Required Skills
CAD
Microsoft Office
AutoCAD

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Requirements
  • A Bachelor's Degree in Civil or Environmental Engineering or a related engineering discipline.
  • At least 3 years of water treatment design experience.
  • An Engineer-in-Training designation, Professional Engineer license, active pursuit of Professional Engineer registration, or the ability to obtain registration by reciprocity.
  • A valid United States driver's license and clean driving record.
  • Ability to communicate and interact effectively within project teams and with clients.
  • Ability to direct activities of less experienced staff.
  • Strong written and oral communication skills.
  • Proficiency with computer-aided design and experience in technical report writing.
Responsibilities
  • Prepare technical memoranda, reports, calculations, correspondence, designs, drawings, specifications, permit applications, quantity takeoffs, and cost estimates for less complex projects or discrete tasks on more complex projects under senior staff supervision.
  • Assist the Project Manager and senior staff with project schedules and budgets by reporting project progress and identifying additional work outside the contractual scope of work.
  • Work with subconsultants under the direction of the Senior Project Engineer or Project Manager.
  • Serve as Lead Designer on less complex projects or discrete tasks on more complex projects by coordinating with the project team.
  • Review calculations, design assumptions, and discipline concepts for quality control.
  • Provide technical input into proposals by developing scopes of work, budgets, and schedules.
  • Assist with technical presentations and participate in client meetings and technical presentations.
  • Work within established hourly budgets and monitor personal performance.
  • Develop expertise in applicable local, state, and federal regulations.
  • Maintain client relationships on technical issues through regular communication as directed by the Project Manager.
  • Lead fieldwork, including reviewing existing facility conditions, conducting laboratory and sampling work, evaluating existing infrastructure performance, and observing construction and startup activities.
  • Assist with construction administration by tracking and reviewing submittals, preparing meeting agendas and minutes, reviewing and compiling construction reports, and tracking construction schedules.
  • Provide updates to the Senior Project Engineer and/or Project Manager.
  • Maintain positive working relationships with staff and provide on-the-job training and mentoring for entry-level engineers and interns.
  • Develop writing and presentation skills and present data supporting technical decisions and their rationale.
Desired Qualifications
  • Experience with three-dimensional drafting or building information modeling products such as Plant 3D, Revit, or Navisworks.
  • Prior experience working in engineering consulting is strongly preferred.

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 Jobs

Simplify's Take

What believers are saying

  • Apex earned Zweig’s 2026 Hot Firm No. 28 ranking, signaling strong growth momentum.
  • Tully and CWE expanded Apex’s stormwater, civil engineering, and California footprint in 2026.
  • March 2026 and February 2026 acquisitions broadened Apex’s municipal and private-market project pipeline.

What critics are saying

  • Private equity ownership pressures Apex to chase integrations and leverage before 2027.
  • Apex’s acquisition spree risks cultural friction and margin dilution across California, Florida, and Intermountain West.
  • A single failed integration or buyer slowdown could break Apex’s roll-up story and stall growth.

What makes Apex Companies unique

  • Apex combines water, environmental, and infrastructure services under one national platform.
  • Morgan Stanley Capital Partners backs Apex, enabling acquisitions like Tully and CWE in 2026.
  • Apex’s ARTEMIS data tools and stormwater lifecycle expertise deepen client lock-in.

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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

17%

1 year growth

17%

2 year growth

17%
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.