Civil Engineering Intern

The Opportunity

Join Tetra Tech’s California team as a Civil Engineering Intern in our Irvine, CA office, supporting critical water infrastructure projects. This role offers hands-on experience across multiple disciplines, with the opportunity to align your work with one of three focus areas: Water Process & Treatment, Water Supply, or Water Conveyance.

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.

Position Summary

Tetra Tech is seeking a Civil Engineering Intern to support water-focused projects in Irvine, CA. Candidates will have the opportunity to indicate their preferred technical focus during the application process:

• Water Process & Treatment
• Water Supply (Wells, Storage, Distribution)
• Water Conveyance (Pipelines, Pump Stations, Transmission Systems)

Interns will assist with engineering design, technical analysis, and preparation of project deliverables while working closely with engineers and project teams.

Essential Functions:

• Assist with engineering calculations, design development, and technical analysis
• Support preparation of construction drawings, reports, and specifications
• Perform quantity takeoffs and assist with cost estimates
• Collaborate with multidisciplinary teams including civil, mechanical, and electrical engineers
• Support permitting and regulatory documentation

• Participate in field visits or site assessments as needed

   

   

  Water Process & Treatment:

• Assist with treatment process layouts and hydraulic profiles
• Support design of treatment systems (e.g., filtration, pumping, chemical feed)

• Contribute to process calculations and technical evaluations

   

   

  Water Supply:

• Support design of water distribution systems, wells, and storage facilities
• Assist with hydraulic modeling and demand analysis

• Work on pipeline layouts and system planning

   

   

  Water Conveyance:

• Assist with design of large-diameter pipelines and pump stations
• Support hydraulic calculations and pipeline alignment development
• Contribute to plans and profiles for transmission systems

Required Qualifications

• Currently pursuing a Bachelor’s degree in Civil, Environmental, or related Engineering field
• Basic understanding of civil engineering fundamentals
• Strong analytical and problem-solving skills
• Effective written and verbal communication skills

Preferred Qualifications:

• Exposure to water/wastewater coursework or projects
• Familiarity with AutoCAD Civil 3D or similar design tools
• Basic understanding of hydrology, hydraulics, or fluid mechanics
• Interest in pursuing EIT certification after graduation

Life at Tetra Tech:

The perks of working at Tetra Tech include:

• Comprehensive and market-competitive benefits.
• 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.