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 Our HSE Manager position is based out of our Loveland, Colorado office and supports oil & gas and broader environmental services across the region. This position involves a combination of field and office work. For that reason, we are only considering candidates who are local to the area (or willing to relocate — relocation costs negotiable), and agreeable to this work arrangement. Reporting to the Corporate Safety Director, the HSE Manager will directly supervise 1-2 HSE staff, mentor field personnel on HSE requirements, and lead day-to-day HSE performance for the region. This work supports a large portfolio of projects, is fast paced, technical in nature, and involves positive interaction with staff, clients, other businesses, and regulators. The compensation range for this role is $ 120,000 to $ 140,000 USD commensurate with experience, skills, and geographic location. To thrive in this role, you'll be comfortable taking ownership of the following responsibilities: Lead the training, development, and mentoring of field personnel on HSE requirements, ensuring they have the tools, training, and knowledge necessary to perform their day-to-day job functions safely, and building competency, accountability, and leadership capacity within the team. Serve as a visible and respected leader and advocate for the organization's safety culture, setting expectations through example and proactive engagement. Build working relationships with the Corporate Safety Director, Operations Management, People Managers, Project Managers and staff to drive safety performance across the organization and ensure that safety is actively considered in planning and executing work. Advise and coach operational and HSE leadership on the development and implementation of HSE strategies and tactics. Direct daily field operations with a strong focus on safety performance, operational efficiency, and adherence to site-specific program requirements. Provide HSE support to client locations including oil & gas, petrochemical, utility, federal, and other project sites. Work with the Corporate Safety Director and Divisional Management to ensure compliance with governmental regulations and company/client-specific HSE programs. Inspect workplace environments, activities, and conditions to verify that field work consistently meets local, state, and OSHA requirements and project-specific technical standards. Enforce health and safety policies through regular field safety briefings, hazard assessments, and proactive risk mitigation measures. Serve as the primary technical signatory of Health & Safety Plans (HASPs), risk assessments, standard operating procedures (SOPs), and site assessments/audits. Partner with project management and safety professionals to develop, implement, and continuously improve site-specific processes and systems that comply with OSHA regulations and company standards. Assess and audit project safety and health compliance, communicate areas of improvement to the project team, and document audits and corrective actions in our EHS software. Support HAZWOPER and medical surveillance program training and compliance. Manage select HSE processes/programs (e.g., audit program, emergency response, HSE information management systems). Lead incident investigations to identify root causes and appropriate corrective actions to prevent recurrence of similar incidents. Measure and report on KPIs, leverage HSE systems, and drive standardization of HSE practices across teams to achieve continuous improvement in HSE performance. Support the development of and effectively deliver HSE presentations, training, operating procedures, and periodic written communications that reinforce relevant HSE topics company-wide . Support the design and implementation of technology and innovative solutions to support effective HSE risk management. Identify trends and issues for HSE operations and engage leaders to proactively develop solutions. Contribute to client relationship building, and marketplace reputation that helps develop business. Support preparation of proposals, project reports, and other clear and compelling content. 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 . Bachelor's degree in Safety , Environmental Science, or a related field from an accredited four-year college or university (required) — or an equivalent combination of experience and education. 8+ years of relevant HSE work experience, including field experience (required). 4+ years of experience leading, managing, or mentoring HSE staff or programs (preferred). Certified Safety Professional (CSP) or ability to obtain (required). General knowledge of Federal and State OSHA requirements (required). Familiarity with Colorado state and local safety and environmental regulations, including Colorado Energy & Carbon Management Commission (ECMC) requirements, is a plus. Familiarity with IOGP (International Association of Oil & Gas Producers) standards and guidelines is a plus. Experience in the oil & gas or oilfield services sector and environmental consulting (preferred). Experience with

HAZWOPER

projects and a current 40-Hour

HAZWOPER

certification (preferred). Prior health or industrial hygiene experience and health and safety auditing experience (preferred). Proficiency in Microsoft Office Suite and other related business applications/software (required). Ability to translate HSE principles and strategy into practical applications and action plans that affect team behavior and achieve safety performance metrics. Strong problem-solving, analytical, organizational, and time/project management skills. Effective verbal and written communication skills, including strong technical writing skills. Proven ability to build collaborative partnerships and effective working relationships with all levels of employees, clients, and regulators. Able to work independently and manage multiple competing responsibilities (i.e., self-starter, self-motivated) — and to work effectively in a team environment. Requires a valid driver's license and clean driving record, and successful clearance of a criminal background check, motor vehicle records check, and drug test. Physical ability to perform outdoor field work, navigate remote and rugged project locations, and lift/carry up to 50 lbs. Ability and willingness to travel locally, with occasional overnight travel. Ability to work at a desk and/or computer, or driving to field operations sites, for extended hours. Work Environment and Physical Requirements The physical and environmental requirements below reflect what's typically needed to perform the essential functions of this role safely and effectively. We may provide reasonable accommodations for qualified individuals with disabilities, consistent with applicable law, to support performance of the essential functions. Sitting, standing, and walking Lifting 50 pounds several times a day Overhead lifting of over 20 pounds #INDONT #LI-MG1 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.