Senior Field Service Technician

About Us At Onterris, we build careers grounded in purpose, responsibility and real-world impact. “For Planet and Progress” is our north star that guides everything we do. We believe environmental responsibility and human progress are interconnected, interwoven and international. Our scientists, engineers, field teams, consultants and professionals collaborate across disciplines and geographies, guiding industries and governments, ensuring that communities and environments thrive. When you join us, you’re not just forging a career, you’re joining a movement. A movement for better thinking, smarter solutions and lasting impact. Together, we will advance our way of life and protect the integrity of our environment every step of the way. As a Senior Field Service Technician, you will be responsible for driving the implementation of our innovative water and vapor treatment technologies in the field along with supporting the operations pilot demonstration units. This position will partner with Project Managers when jobs are awarded to review project scope of work, roles and responsibilities, and project safety. Additionally, this position will apply theory and principles of environmental engineering to modify, test, and operate equipment and devices used in the prevention, control, and remediation of environmental problems, including waste treatment and site remediation, under the direction of engineering staff or scientists. This position may assist in the development of environmental remediation devices. The annual compensation range for this role is $80,000-$90,000 commensurate with experience, skills, and geographic location. This position is based in Portland, ME. A Day in the Life Reporting to the Field Services Project Manager, this role will be responsible for a full range of activities including: Leads and independently performs complex field engineering and technical activities, including equipment inspections, startup and commissioning support, fabrication progress evaluations, vendor and supplier site audits, construction inspections, field verification measurements, site assessments, troubleshooting, and comprehensive data collection efforts. Serves as a technical lead in the field by coordinating with clients, contractors, vendors, and project teams to ensure compliance with project specifications, quality standards, safety requirements, and operational objectives. Performs operations and maintenance (O&M) of various types of environmental treatment equipment including pumps, filters, tanks, pressure vessels, and other types of process unit operations. Poses a general understanding of system hydraulics, mechanical operation/functionality and instrumentation/electrical control schemes. Support fabrication activities, as well as hands‑on set‑up of bench and pilot testing equipment. Executes piping/skid fabrication in the shop and field, troubleshoots and repairs mechanical and electrical system issues or failures. Collects samples using a variety of sampling methods and operates field monitoring equipment including but not limited to: PID/FID, pH, EC, DO, GEM, turbidity, water level, and LEL meters. Measures and records treatment operational data by carefully documenting monitoring and testing results on field forms and prepares field daily reports and data sheets. Conducts field monitoring, sampling, testing and basic evaluations; maintains chain‑of‑custody documentation and regulatory sample handling protocols; and records inspection data in electronic spreadsheets and reports. Ensures proper labeling and handling of hazardous material and waste. Exercises safe work practices by following all Company safety rules and OSHA regulations, including attendance at all required safety training programs. Communicates promptly with Project Managers and various stakeholders to inform of site conditions and activities. Interacts with clients acting as a front‑line representative of the company, presents a professional appearance, and wears appropriate PPE on job sites. Participates in the company’s continuous improvement programs and provides support to team efforts. Keeps up‑to‑date and current on industry trends by completing formal training. Performs other duties as assigned. Your Expertise and Skills To perform this job successfully, individuals must be able to perform each duty and responsibility satisfactorily. The requirements listed below are representative of the knowledge, skill, and/or ability required. High School Diploma or equivalent 5+ years of experience performing mechanical/electrical troubleshooting, environmental collection, monitoring, sampling, testing and basic evaluation Must possess a valid Class C driver’s license with a clean driving record and have reliable transportation for travel to project and job sites. NFPA70E Training or the willingness to complete. Ability/willingness to travel up to 75% Ability to complete and maintain HAZWOPER certification with the 40 hour HAZWOPER environmental health and safety class, and annual 8-hour refresher classes Must have the ability to lift 50 pounds such as monitoring equipment and tools, with or without assistance Proficient with Microsoft Office software Be able to deliver and receive electronic documents Ability to interface with cross‑functional teams and all levels of personnel/management Strong problem solving and analytical skills Solid organization and time/project management skills Effective verbal and written communication skills, must have legible handwriting Able to work independently and manage multiple responsibilities (i.e. self‑starter, self‑motivated) Preferred Qualifications Familiarity with supervision of construction projects Background in electrical, plumbing or other mechanical trades. Electrical background preferred. Competence in HVAC, mechanical and electrical. Ability to operate systems via PLC SCADA. Associate’s Degree in Environmental Studies from an accredited university or a technical certification Working Conditions Physical Demands While performing the in‑office responsibilities of the job, the employee may be required to spend long hours sitting and using office equipment and computers, and is regularly required to sit, talk, and hear. The employee frequently is required to use hands and fingers to handle or feel. While performing the out of office field responsibilities for the job, the employee will be required to travel up to 75% of the time. Typically out of state, Monday to Friday travel. There may be occasional multiple week operations stints which will be compensated with flexible off time during home periods. There may be occasional lifting (overhead, waist level) from floor of supplies and materials weighing no more than 50 pounds. The work may involve some bending, standing or walking. Work Environment Moderate exposure to environmental conditions that impact physical comfort such as temperature extremes while performing field work is possible. Onterris is a leading global environmental solutions company partnering with organizations to solve complex challenges where environmental pressures, regulatory expectations and operational risks intersect. Guided by our mission to advance the way of life without compromising the integrity of our environment, we believe environmental responsibility and human progress are fundamentally connected. Our scientists, engineers, field teams and consultants apply systems thinking that unites science, data and practical expertise to deliver solutions that strengthen our clients’ resilience, mitigate risk and protect the air, water and soil that sustain communities, while uncovering responsible paths forward for planet and progress. For more information, visit We are an equal opportunity employer and encourage applications from people of all backgrounds. We acknowledge that these experiences and perspectives help to enrich our teams and contribute to our ongoing success. We are committed to providing access and reasonable accommodation in our employment for all applicants. For US residents, click here to learn more. At Onterris, we take on complex challenges with purpose and momentum, alongside teams that lead with integrity, deliver together, and invest in your growth.

• Working with inspiring coworkers and clients across the globe over the past five years has been incredibly rewarding. Their passion motivates me to improve our client experience and work that I deliver.” - Erin Peck, Emissions Services
• There are not many places where a toxicologist can be boots‑on‑the‑ground at an environmental emergency one day and deep in a human health risk assessment or litigation the next, but this company is one of them, and honestly, that breadth is what makes me love the work. We are a team of scientists with a broad range of talents and experiences who genuinely take the mission to heart, because protecting people and communities from chemical hazards is not abstract here; it is exactly why we show up every day. The culture reflects that shared commitment in the best way: collaborative, rigorous, and truly motivated by the impact we make together.” - Andre Richardson, Consulting
• I knew my position here would be more than just a job. Every day is a new, exciting challenge to solve, and I get to go home knowing that the work I am doing is having a positive impact on the world.” - J Esteves, R&D