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. A Day in the Life As an Environmental Project Manager, you will primarily support our client, a large oil/gas company, with environmental compliance and risk reduction, and work to convert liabilities into assets. This position will be based out of our Loveland, CO office with limited hybrid work optional, and can involve client site visits. This work consists of managing a large portfolio of projects, and a technical team. It is fast-paced, technical in nature, and involves regulatory understanding and compliance. The compensation range for this role is $120,000 to $150,000 commensurate with experience, skills, and geographic location To thrive in this role, you'll be comfortable taking ownership of the following responsibilities: Manage a portfolio of oil & gas remediation projects through full compliance lifecycle, ensuring regulatory compliance and accelerated closure across multiple phases. Lead, train, mentor, and develop project teams; coordinate field activities including sampling, monitoring well installation, and remedial oversight. Deliver high‑quality, on‑time work products for internal and external clients. Advance site readiness and compliance documentation, meeting or exceeding regulatory deadlines (including ECMC Form 19 and Form 27). Own project budgets, schedules, profitability, and cost control; prepare scopes, work plans, estimates, and proposals. Oversee field operations, invoicing, labor approvals, procurement, equipment planning, and vendor management. Serve as client contact, managing expectations and communication. Prepare and review technical reports, permits, and senior‑level document reviews. Maintain project data collection and database management. Identify and pursue new business opportunities. Stay current on industry regulations and best practices; participate in training and continuous improvement. Adhere to and champion company safety standards and OSHA requirements. Travel to offices, project sites, and meetings as needed, including occasional overnight travel. Perform other duties as assigned. Your Expertise and Skills These requirements reflect the knowledge, skills and abilities that help you do your best work here. Bachelor's degree in Geology, Engineering, or related science field. 7+ years of environmental experience with progressive project management responsibility; 3+ years of team management. Proven experience in site investigation, soil and groundwater remediation design, and remediation system operations. Strong knowledge of Colorado Oil & Gas regulations, including

ECMC 900

Series Rules. Hands-on experience with Colorado ECMC, CDPHE, and U.S. EPA, including spill response, Form 19 and Form 27 processes. Proficient in Microsoft Office and electronic data collection tools. Ability to work independently, manage multiple priorities, and collaborate across teams and clients. Valid driver's license; ability to pass background, MVR, and drug screening. Frequent travel within Northeast Colorado; ability to lift up to 50 lbs. Strong commitment to workplace safety and hazard mitigation. Preferred Qualifications 40‑hour

HAZWOPER

certification. AutoCAD or similar design software experience #INDMEG #LI-LK1 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 www.onterris.com. 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