Project Civil / Environmental Engineer

The Opportunity

Tetra Tech is seeking a highly motivated Project Civil/Environmental Engineer to support project delivery from our Longmont, CO, office. This position will serve as the lead Project Engineer on a diverse portfolio of civil, water, and environmental infrastructure projects supporting the mining, oil and natural gas, commercial development, and industrial sectors.

The successful candidate will be responsible for managing and contributing to projects throughout their full life cycle, including planning, design, permitting, construction support, and closeout. Key responsibilities will include preparing engineering designs; grading, utility, and drainage plans; hydrologic and hydraulic analyses; drainage and stormwater reports; technical memoranda; construction documents; cost estimates; specifications; permit applications; and other project deliverables.

Any candidate interested in this opportunity should apply by the December 1, 2026 deadline.

Why Tetra Tech

At Tetra Tech, we are Leading with Science to solve the world’s most complex challenges. Our industry-leading experts in engineering and consulting are committed to driving positive change in communities around the world. For over 50 years, we have been at the forefront of innovation and sustainability. Today we stand as a market leader, offering cutting-edge solutions in water, environment, energy, and international development. Our work has improved more than 625 million lives around the world.

Your Impact

Join Tetra Tech to make a real difference. Our work leverages cutting-edge technologies, advanced analytics, and the expertise of world-class scientists and engineers to create meaningful change around the world. Discover your full potential – join us to advance your career while leaving a lasting legacy.

Essential Job Functions

• Prepare engineering designs, calculations, reports and technical memoranda, construction drawings, design criteria, and specifications using applicable industry standards and regulatory requirements. Work may include site grading, utilities, roadways, erosion and sediment control, stormwater management, and water resources infrastructure.
• Develop drainage studies and stormwater management plans, including watershed delineation, hydrologic and hydraulic analyses, stormwater quality evaluations, floodplain considerations, and drainage impact assessments.
• Utilize software such as AutoCAD Civil 3D, HEC-HMS, HEC-RAS, and GIS platforms such as ArcGIS Pro as appropriate.
• Evaluate, size, and design stormwater conveyance and detention facilities, including storm drains, culverts, channels, swales, inlets, outlet structures, detention and retention ponds, infiltration facilities, water quality features, and related appurtenances.
• Prepare stormwater management plans, permit applications, technical specifications, bid documents, opinions of probable construction cost, quantity takeoffs, schedules, and other contract documents.
• Other duties as assigned.
  
  

Required Qualifications

• Bachelor of Science degree in Civil Engineering, Environmental Engineering, or a closely related discipline.
• 8 - 13 years of progressively responsible engineering experience, including demonstrated experience managing civil, environmental, water resources, or infrastructure projects.
• Professional Engineer (P.E.) Registration is required.
• Experience with Microsoft Office and engineering software is required, with working knowledge or collaboration with computer-aided design (CAD).
• Strong written, verbal, organizational, and interpersonal communication skills are required, with the ability to prepare clear technical documents, present engineering recommendations, coordinate with multidisciplinary teams, and communicate effectively with clients and contractors.
• Ability to travel and perform field work/oversight (approx. 15% of travel required).
• A Pre-employment drug screening in compliance with state regulations is required.
• Must possess a valid driver's license with a clean driving record without restrictions.
  
  

Preferred Qualifications

• Experience with Autodesk Civil 3D is preferred but not required.
• Health and Safety Certifications: MSHA training and/or OSHA HAZWOPER certification is preferred but not required, depending on project needs.
  
  

Physical Requirements

• Ability to lift, carry, push, and pull up to 50 pounds occasionally.
• Ability to travel and perform field work (approx. 15% of travel required).
• Ability to walk across variable terrain, including uneven ground, in all weather conditions (hot/cold temperatures, loud noises, heavy equipment, etc.) for field work including taking notes on construction sites.
• Office work will consist of frequent periods of time sitting or standing at a desk and using a computer. Field work will consist of frequent periods of time walking, lifting, and bending.
  
  

Work Environment / Environmental Factors

• This position is based out of the Longmont CO office and will have office and field responsibilities.
• Field work will include work to be performed outside and, as a result, may include working in various environmental factors (weather, altitude, terrain, noise, etc.). This can include remaining stationary for long periods of time, walking, bending, lifting, and sitting for site assessments, oversight, and other field activities.
• Office work will include extended periods sitting or standing at a desk and using a computer.
  
  

Additional Information

• Full-time, Monday through Friday work schedule (40 hours). Occasionally extended hours may be required based on project and/or client needs.
• This position may have a hybrid work arrangement to be worked out with your supervisor, but the candidates must reside within 25 miles of the local office. This arrangement is subject to review and may change at the company’s discretion.
• Work will be performed in an office and field setting.
  
  

Target salary range: $100,000 to $120,000. Please note that Tetra Tech considers various factors in determining pay, including but not limited to: education, relevant and demonstrated work experience in the role, skills, geographic location, qualifications, certifications, and other competencies relevant to the needs of the business.

Life At Tetra Tech

The perks of working at Tetra Tech include:

• Comprehensive and market-competitive benefits.
• Tetra Tech offers the following optional benefits: Medical, Dental, Vision, Prescription, Accidental Death & Dismemberment, Long & Short-Term Disability, Health & Dependent Care Flexible Spending. Financial Benefits: Group Term Life, Optional Group Term Life Insurance, Business Travel Accident Insurance, Health Savings Account, 401K, Employee Stock Purchase Plan, Time Off with Pay, Employee Assistance Program, Adoption Assistance, Leaves of Absence.
• Merit-based financial rewards.
• Flexibility and company-wide commitment to work/life balance.
• Collaborative team atmosphere that values the contributions of all employees.
• Learning and development opportunities for ongoing professional growth.
  
  

About Tetra Tech

Tetra Tech is the leader in water, environment, and sustainable infrastructure, providing high-end consulting and engineering services for projects worldwide. With 30,000 employees working together, Tetra Tech provides clear solutions to complex problems by Leading with Science ® to address the entire water cycle, protect and restore the environment, design sustainable and resilient infrastructure, and support the clean energy transition.

Tetra Tech is proud to be an Equal Opportunity Employer. All qualified candidates will be considered without regard to race, color, religion, national origin, age, disability, sexual orientation, gender identity, status as a protected veteran, or any other characteristic protected by law. Tetra Tech is a VEVRAA federal contractor and we request priority referral of veterans.

We invite applications from all interested parties.

Explore our open positions at https://www.tetratech.com/careers. Follow us on social media to learn more about our people, culture, and opportunities:

LinkedIn: @TetraTechCareers

X (Twitter): @TetraTechJobs

We thank all applicants for their interest, however, only those candidates selected for interviews will be contacted.

Please no phone calls or agencies.

Additional Information

• Organization: 117 ECS