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 a Full-Time Laboratory Assistant based in our Orange, CA Laboratory, you’ll step into the lab where every detail matters. You'll play a key role in prepping and handling samples, keeping records accurate, and maintaining a clean laboratory to support on-time results everyday. You’ll collaborate with a strong team of committed professionals, contribute to meaningful scientific work, and grow your expertise in a dynamic, quality-driven environment. The compensation range for this role is $20.00 - $22.00, commensurate with experience, skills, and geographic location. Department: Semi-Volatiles (SVOA) Schedule: Tuesday through Saturday, 2nd Shift (2:00 pm - 10:30 pm) To thrive in this role, you’ll be comfortable taking ownership of the following responsibilities: Perform dishwashing and cleaning, change gas cylinders and perform housekeeping tasks that can include routine repetitive motions such as scrubbing, rinsing, drying, and stacking glassware Sample retrieval, storage and archiving, and responsible for proper sample disposal. Prepare samples and/or reagents according to SOPs and perform support tasks as needed Conduct lab analyses as required and adhere to accurate data/record keeping practices; stay current with all SOP readings and any training as assigned Perform calibration verification of small laboratory equipment such as thermometers and balances Maintain a safe, organized work area and ensure accurate logbook records and accurate data entry into LIMS Conduct inventory of laboratory supplies and chemicals and restock laboratory cabinets and storage areas with as needed Comply with Quality Assurance Program and other policies Comply with company's Health and Safety Plan Other duties as assigned by the Group Leader or Lab Director Your Expertise and Skills These requirements reflect the knowledge, skills and abilities that help you do your best work here. High School Diploma Basic laboratory techniques (knowledge of PPE, use of balance, pipetting, glassware handling, etc) Basic Excel skills required Must be comfortable working with strong acids and solvents Excellent communication skills required Detail oriented Preferred Skills Prior Laboratory experience preferred bot not required Knowledge of analytical method, analytical instruments, general lab practices and lab safety Ability to work independently and in a team Good organizational skills and strong communication skills 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 to qualified individuals with disabilities, consistent with applicable law, to support performance of the essential functions. Sitting, standing, and walking Must be able to work in a stationary position for entire shift duration Lifting and moving up to 25 lbs independently and 50 lbs using assisted lifting equipment Works in an office and/or laboratory environment #LI-SG1 #INDONT 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

Laboratory Assistant - SVOA (2nd Shift).

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