Wastewater Internship Jobs (NOW HIRING)

The Senior Water/Wastewater Engineer is a senior-level professional responsible for leading the planning, design, permitting, and execution of complex water and wastewater infrastructure projects. This role provides technical leadership, project management, and client relationship management while delivering innovative engineering solutions that improve essential public infrastructure and support the communities we serve.

The Senior Water/Wastewater Engineer works closely with clients, project managers, multidisciplinary teams, contractors, and regulatory agencies to ensure projects are delivered on schedule, within budget, and in accordance with applicable standards and ARRO's quality expectations. This role also plays a key part in mentoring engineering staff, supporting business development, and driving the continued growth of our Water Services practice.

• Lead the planning, design, permitting, and execution of complex water and wastewater infrastructure projects from concept through construction and project closeout.
• Prepare and oversee engineering calculations, reports, specifications, construction plans, and technical documentation.
• Lead the design and evaluation of water distribution systems, wastewater collection systems, treatment facilities, pumping stations, storage facilities, and related municipal infrastructure.
• Perform engineering analyses, hydraulic modeling, feasibility studies, and technical evaluations to support project development.
• Develop project scopes, budgets, schedules, staffing plans, cost estimates, and supporting project documentation.
• Coordinate permitting activities and obtain approvals from local, state, and federal regulatory agencies.
• Serve as the primary point of contact for clients while coordinating with project managers, contractors, regulatory agencies, consultants, and multidisciplinary teams.
• Monitor project schedules, budgets, profitability, and overall project performance while identifying and mitigating project risks.
• Conduct field investigations, site visits, construction observations, and provide construction administration services, including responding to Requests for Information (RFIs), reviewing shop drawings, and evaluating change orders.
• Review project documents for technical accuracy, completeness, quality, and compliance with applicable standards and regulations.
• Support business development through proposal preparation, client presentations, scope development, and identifying opportunities for additional services.
• Mentor and provide technical leadership to engineers, designers, interns, and other technical staff while fostering collaboration and professional development.
• Promote continuous improvement, engineering excellence, safe work practices, and compliance with ARRO's quality management standards.
• Any other duties, as necessary, to drive the vision, fulfill the mission, and uphold the values of the organization.

• Bachelor's degree in Civil Engineering, Environmental Engineering, or a related engineering field.
• Professional Engineer (PE) license required.
• Minimum of 10 years of relevant experience in water and wastewater engineering.
• Demonstrated experience managing municipal water and wastewater infrastructure projects.
• Strong knowledge of water and wastewater treatment, collection, distribution, and related municipal infrastructure systems.
• Advanced understanding of engineering design principles, permitting requirements, and applicable federal, state, and local regulations.
• Experience preparing engineering reports, calculations, specifications, construction documents, and cost estimates.
• Proven project management experience managing multiple concurrent projects, budgets, schedules, and multidisciplinary teams.
• Proficiency in Microsoft Office Suite and engineering software such as AutoCAD Civil 3D, GIS, and hydraulic modeling software.
• Excellent organizational, communication, leadership, analytical, presentation, and problem-solving skills.
• Ability to build strong client relationships, mentor engineering staff, and support business development initiatives.

• Ability to sit for prolonged periods while working at a computer workstation.
• Frequent use of hands and fingers for typing, data entry, and reviewing engineering documents.
• Ability to occasionally travel to project sites, client meetings, regulatory meetings, and field locations.
• Ability to lift and carry light materials or equipment (typically up to 20–25 pounds).
• Required to have close visual acuity to perform activities such as reviewing technical documents, engineering calculations, drawings, and construction plans.
• Work environment consists of a combination of office, client-site, remote, and field-based work.
• Field work may involve exposure to varying weather conditions, uneven terrain, construction activities, and operational facilities.
• Noise level in the work environment is typically moderate.
• May require occasional extended hours to meet project deadlines, client needs, or construction schedules.

ARRO offers a comprehensive and competitive benefits package, including medical, dental, and vision insurance, 401(k) with company match, paid time off, paid holidays, tuition reimbursement, and professional development support. We are committed to supporting both the personal well-being and career growth of our employees.

The employee will be expected to report to an ARRO office on a regular basis in accordance with the established schedule. This position primarily involves office-based work with opportunities for field visits, client meetings, and hybrid work available upon meeting performance expectations and demonstrating an understanding of ARRO's processes, as approved by the supervisor.