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Apex Companies

National environmental consulting and engineering firm

Principal Wastewater

Full-Time
$180k - $220k/yr+ Annual bonus opportunities + Minimum $20,000 sign-on bonus
Expert
Bachelor's, Master's
Providence, RI, USA+3 moreMore locations: Woburn, MA, USA | Glastonbury, CT, USA | Quincy, MA, USA
HybridHybrid work; candidates willing to relocate to Massachusetts, Connecticut, or Rhode Island will be considered.
Architecture & Civil EngineeringWater Resources Engineering

About the job

Requirements
  • A BS or MS degree in Civil Engineering, Environmental Engineering, or another relevant discipline is required.
  • At least 15 years of relevant wastewater industry experience is required.
  • A registered Professional Engineer license or other professional certifications or registrations appropriate to the primary field of expertise in states where the company or individual works is preferred; obtaining the credential by reciprocity is acceptable.
Responsibilities
  • Demonstrate and practice the company’s core values.
  • Foster a culture of growth, innovation, collaboration, and continuous learning within the company.
  • Lead and inspire teams of engineers, scientists, project managers, and support staff to deliver high-quality project results.
  • Recruit, mentor, and develop junior and mid-level staff, supporting their growth and career advancement.
  • Cultivate, engage, and maintain strong relationships with new and existing clients and partners.
  • Understand the business and support implementation of business practices and processes.
  • Lead projects from development through completion by identifying schedules, scopes, budget estimates, and implementation plans, including quality assurance/quality control and risk management; champion QA/QC procedures and policies.
  • Understand contract risks, terms and conditions, and professional liability matters, and mitigate risks in consultation with senior management or divisional leadership as needed.
  • Address and resolve complex situations related to project execution, client demands, fiscal management, growth initiatives, business development, staffing, and administration.
  • Prepare project proposals and scopes of work, review and approve budgets prepared by project managers, and complete initiation documents with scope, budget, and schedule for assigned projects.
  • Manage project implementation with the assigned team, ensuring company procedures are followed and work is completed as planned and scheduled; keep clients informed and provide management, advice, and support to project-team members.
  • Delegate tasks to project managers and other staff with appropriate levels of support.
  • Coordinate with peers and subconsultants, working with project managers to anticipate and address schedule and staffing conflicts.
  • Supervise interdisciplinary teams, coordinating project managers, subcontractors, subconsultants, and staff on project execution and scheduling.
  • Provide technical advice and contribute to recommendations for assigned projects and others as needed.
  • Produce high-quality technical memoranda and reports; ensure quality review guidelines are followed and final reports and presentations meet company standards and formats.
  • Meet regularly with clients to discuss projects, company performance, and client satisfaction, and identify business or cross-selling opportunities with clients or through referrals; engage additional staff for cross-selling and up-selling as needed.
  • Work with project managers to track project costs against budgets and ensure timely client invoicing in accordance with company policy.
  • Negotiate amendments and change orders, consulting senior management or divisional leadership in advance on sensitive items.
  • Present potential new business, cross-selling opportunities, competitive bids, and new technology or regulatory factors to the company.
  • Solicit new clients and projects by identifying opportunities with current and prospective clients; arrange meetings with appropriate technical staff and participate in requested proposal development.
  • Seek cross-selling opportunities beyond the role’s area of expertise and work with other Principals and Project Managers to support client growth.
  • Manage and lead the sales process for existing clients, including relationships with large, complex, or multi-project clients.
  • Prepare proposals, lead proposal teams, participate in project interviews, negotiate fees, prepare contracts, and present information to prospective clients.
  • Recognize strengths and development needs of assigned project staff; support and evaluate direct reports, and conduct or participate in annual staff reviews as appropriate.
  • Mentor and coach staff at all experience levels and develop professional staff, especially project managers.
  • Manage direct reports, including onboarding and offboarding, workload management, time and expense approval, career-path development, and performance management.
  • Assist with recruiting, interviewing, and onboarding staff, and act as a hiring manager or assimilation partner for new hires.
  • Identify strategic hires and target key staff for recruitment to support the company’s financial and strategic goals and value creation.
Desired Qualifications
  • Professional Engineer registration or other professional certifications or registrations appropriate to the primary field of expertise in the states where the company or individual works; ability to obtain the same through reciprocity is acceptable.

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.