Senior Water​/Wastewater Engineer - Land Systems

Position:Senior Water/Wastewater Engineer - Land Application Systems

Location: Any ARRO Office, PA

Remote Status: Hybrid

Job :205

# of Openings:3

This position is responsible for leading the planning, design, permitting, and implementation of water and wastewater infrastructure projects. The Senior Water/Wastewater Engineer provides technical leadership, project management, and client service support for municipal, utility, institutional, industrial, and private-sector projects involving water treatment, wastewater treatment, water reuse, land application systems, pumping facilities, storage systems, and related infrastructure.

The Senior Water/Wastewater Engineer serves as a technical resource and project leader, working closely with clients, regulatory agencies, multidisciplinary project teams, and internal staff to deliver high-quality engineering solutions that support sustainable water management and resilient infrastructure. This role offers opportunities to lead complex projects, mentor staff, expand client relationships, and contribute to the continued growth of ARRO’s Water/Wastewater practice.

• Lead planning, design, permitting, and construction-phase services for water and wastewater infrastructure projects.
• Serve as technical lead and/or project manager for land application system projects, including wastewater reuse, spray irrigation, drip irrigation, reclaimed water systems, disposal fields, storage facilities, and pumping systems.
• Prepare engineering reports, basis-of-design documents, permit applications, technical memoranda, plans, specifications, and construction documents.
• Develop and review hydraulic calculations, water balances, nutrient loading analyses, application rate calculations, storage evaluations, soil assessments, and operational plans.
• Coordinate with regulatory agencies regarding permitting requirements for wastewater treatment, reuse, land application, groundwater monitoring, and discharge-related facilities.
• Evaluate treatment processes and effluent quality requirements to support land application, water reuse, and no-discharge systems.
• Lead multidisciplinary coordination efforts with surveyors, environmental scientists, hydro geologists, agronomists, soil scientists, electrical engineers, contractors, and other project stakeholders.
• Provide quality assurance and quality control review of technical work products.
• Mentor and support junior engineering and technical staff.
• Manage project scope, schedule, budget, staffing, and client communications.
• Support business development efforts through proposal preparation, scope development, fee estimates, interviews, and client presentations.
• Develop and maintain strong client relationships with municipalities, utilities, private developers, industrial clients, and regulatory agencies.
• Participate in construction administration activities, including shop drawing review, responses to RFIs, field observations, pay application review, startup assistance, and project closeout support.
• Any other duties, as necessary, to drive the vision, fulfill the mission, and abide by the values of the organization.

• Bachelor’s degree in Civil Engineering, Environmental Engineering, Agricultural Engineering, or related engineering field.
• Licensed Professional Engineer (PE) or ability to obtain Pennsylvania licensure within a defined timeframe.
• Minimum of eight (8) years of progressive experience in water and wastewater engineering.
• Demonstrated experience with the design and permitting of land application systems for treated wastewater, reclaimed water, industrial wastewater, or process wastewater.
• Strong understanding of wastewater treatment processes, water reuse systems, hydraulic design, pumping systems, storage facilities, and site/civil infrastructure.
• Experience preparing regulatory permit applications and coordinating with local, state, and federal regulatory agencies.
• Ability to manage project scope, schedules, budgets, technical quality, and client relationships.
• Knowledge of agronomic loading, nutrient management, crop uptake, soil suitability, hydraulic…