Senior Water/Wastewater Project Engineer

Sigma Earth; United States; On-site; USD 140,000 - 210,000; Full time

Benefits offered by this job

Flexible Schedule

Competitive Pay

Medical Vision Dental HSAs

Generous PTO

401K with employer contribution

Job summary

Apex Companies is seeking a Senior Water/Wastewater Project Engineer to shape water infrastructure projects across regions. You will design advanced treatment systems, write and review plans and master reports, and guide project teams to meet the highest standards of quality and safety.

Join a team that values flexibility, competitive pay, and strong growth. You’ll work on impactful projects with regulatory partners and clients, supported by a culture of excellence and professional development.

Qualifications

• Professional Engineer (PE) registration or ability to obtain in 6 months.
• 10+ years of hands-on experience in water and wastewater treatment projects.
• B.S. in Civil Engineering (or related field).

Responsibilities

• Design and evaluate advanced water and wastewater treatment systems.
• Lead in creating and reviewing construction plans and master reports.
• Provide expert technical guidance to ensure high quality standards.
• Manage resources to deliver projects on time and to spec across regions.
• Collaborate with clients and regulatory agencies on permits and compliance.
• Oversee construction observation and project fulfillment from concept to completion.

Skills

PE eligibility within 6 months

10+ years water/wastewater experience

Education

B.S. in Civil Engineering

Job description

Your Responsibilities as a Senior Water/Wastewater Project Engineer:

As our Senior Water/Wastewater Project Engineer, your role will be pivotal in shaping the future of water infrastructure. You will:

• Design and evaluate advanced water and wastewater treatment systems, setting new standards for efficiency and sustainability.
• Lead in the creation and review of critical documents, from construction plans to comprehensive master reports.
• Offer expert technical guidance, ensuring our projects and teams adhere to the highest quality standards.
• Manage resources skillfully, ensuring projects across regions are delivered on time and to specification.
• Collaborate with clients and regulatory agencies, navigating the complexities of permits and compliance with ease.
• Take charge of construction observation and management, ensuring projects unfold smoothly from concept to completion.

What we’re looking for:

• Professional Engineer (PE) registration or ability to obtain in 6 months
• 10+ years of hands‑on experience in water and wastewater treatment projects, with a deep understanding of the technical and regulatory landscapes
• B.S. in Civil Engineering (or related field)

Why you’ll love working for us:

• Flexible Schedule
• Competitive Pay
• Medical, Vision, Dental, and HSA
• Generous PTO
• 401K Plan including employer contribution

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 [e-mail] or [phone]. 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

Apex Job Title: Engineer 4

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.

This role is eligible for a $10,000 sign‑on bonus, subject to the terms and conditions of the Company’s sign‑on bonus program.

When you join Forsgren Associates, a newly acquired Apex Company, you won’t just be ‘going to work’. You’ll be helping grow a longstanding business while receiving the recognition and support your commitment to professional growth deserves.