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Associate Engineer Jobs in Antioch, CA (NOW HIRING)

ASSOCIATE ENGINEER - TREATMENT DESCRIPTION The Associate Engineer - Treatment is to participate in our Water/Wastewater Treatment group. Expertise is desired in planning and design of water and/or ...

ASSOCIATE ENGINEER - TREATMENT DESCRIPTION The Associate Engineer - Treatment is to participate in our Water/Wastewater Treatment group. Expertise is desired in planning and design of water and/or ...

ASSOCIATE ENGINEER - TREATMENT DESCRIPTION The Associate Engineer - Treatment is to participate in our Water/Wastewater Treatment group. Expertise is desired in planning and design of water and/or ...

Associate Mechanical Engineer Location: Vacaville, CA, 95688 Duration: 12 Months Job Type: Temporary Assignment Work Type: Onsite Summary The Process Mechanic is responsible for maximizing equipment ...

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Associate Engineer information

See Antioch, CA salary details

$47.2K

$94K

$150.1K

How much do associate engineer jobs pay per year?

As of Aug 7, 2026, the average yearly pay for associate engineer in Antioch, CA is $93,955.00, according to ZipRecruiter salary data. Most workers in this role earn between $74,500.00 and $108,000.00 per year, depending on experience, location, and employer.

What is an associate engineer?

Associate Engineers are entry-level engineering professionals who support more experienced engineers in designing, developing, testing, and maintaining various projects in their field. They typically work under supervision and assist with tasks such as drafting technical documents, conducting research, analyzing data, and ensuring compliance with industry standards. Associate Engineers often gain practical experience and training to advance to higher-level engineering roles as they develop their skills.

What is the difference between Associate Engineer vs Mechanical Engineer?

AspectAssociate EngineerMechanical Engineer
Required CredentialsBachelor's degree in engineering or related field; entry-level certificationsBachelor's degree in mechanical engineering; professional licensure (optional)
Work EnvironmentDesign, testing, and support roles in engineering teams; often in office or lab settingsDesign, analysis, and manufacturing in industrial or construction settings
Employer & Industry UsageEntry-level position across various industries like manufacturing, construction, and techDesign and development roles primarily in manufacturing, automotive, aerospace, and energy sectors

The main difference between an Associate Engineer and a Mechanical Engineer lies in experience and responsibilities. Associate Engineers are typically entry-level, focusing on supporting engineering tasks, while Mechanical Engineers have more experience and handle complex design and analysis responsibilities. Both roles require a bachelor's degree, but Mechanical Engineers often pursue licensure for advanced roles. The choice depends on your experience level and career goals within engineering fields.

What are some typical challenges associate engineers face when transitioning from academic projects to industry roles?

Associate Engineers often find the transition from academic projects to industry roles challenging due to differences in project scope, teamwork dynamics, and pace. In industry, you’ll likely work on larger, multi-disciplinary teams where effective communication and collaboration are crucial. Additionally, projects often have stricter deadlines and require adherence to established processes and standards, which may be less emphasized in academic settings. Embracing continuous learning and seeking mentorship from senior engineers can help ease this transition and set you up for success.

What are the key skills and qualifications needed to thrive as an associate engineer, and why are they important?

To thrive as an Associate Engineer, you need a solid grasp of engineering principles, problem-solving abilities, and a relevant bachelor's degree. Familiarity with CAD software, industry-specific tools, and basic project management systems is typically required. Strong teamwork, attention to detail, and effective communication set standout candidates apart. These skills and qualities are crucial for delivering accurate technical solutions and contributing effectively to engineering projects.
What are the most commonly searched types of Engineer jobs in Antioch, CA? The most popular types of Engineer jobs in Antioch, CA are:
What are popular job titles related to Associate Engineer jobs in Antioch, CA? For Associate Engineer jobs in Antioch, CA, the most frequently searched job titles are:
What job categories do people searching Associate Engineer jobs in Antioch, CA look for? The top searched job categories for Associate Engineer jobs in Antioch, CA are:
What cities near Antioch, CA are hiring for Associate Engineer jobs? Cities near Antioch, CA with the most Associate Engineer job openings:
Infographic showing various Associate Engineer job openings in Antioch, CA as of August 2026, with employment types broken down into 1% As Needed, 69% Full Time, 27% Part Time, 1% Temporary, and 2% Contract. Highlights an 97% Physical, 1% Hybrid, and 2% Remote job distribution, with an average salary of $93,955 per year, or $45.2 per hour.

Associate Engineer - Treatment

West Yost

Concord, CA

$105K - $148K/yr

Full-time

Posted 24 days ago


Job description

Who We Are:

West Yost is a water resource management and engineering firm focused exclusively on water. Since our founding in 1990, we have partnered with public agencies including cities, counties, utilities, and water districts to plan, design, and deliver water, wastewater, and stormwater solutions that support safe, reliable, and resilient communities.

Our team of more than 265 professionals brings together expertise in groundwater, water supply, treatment, infrastructure, recycled water, stormwater, construction management, and operations technology. We support projects from early planning and permitting through design and construction and complement our engineering services with program management and public outreach to help clients move work forward and engage their communities.

We are proud to be certified as a Great Place to Work®, and to be recognized among Fortune’s® Best Workplaces in Consulting and Professional Services from 2023 to 2025, as well as a top-ranked firm in the AEC Advisors Diversity Index. At West Yost, we are committed to being the water firm of choice for our clients and our team, advancing water resources for future generations through strong partnerships, practical solutions, and a shared commitment to quality.

Compensation Range: $105,230 - $148,560.  Based on our Sacramento, CA office location.  (West Yost uses geographic salary differentials that would apply for candidates in other regions). 

Status: Full-time, Exempt

Location(s):  Preferred locations are Sacramento, CA, Concord, CA, or Lake Oswego, OR  (https://www.westyost.com/locations/ ).

This is a Hybrid role with a minimum of 3 days in the office and optional 2 days remote.

ASSOCIATE ENGINEER – TREATMENT 

DESCRIPTION

The Associate Engineer - Treatment is to participate in our Water/Wastewater Treatment group.  Expertise is desired in planning and design of water and/or wastewater treatment and recycled water systems. This role will contribute to the development of the firm’s Treatment practice and have client involvement.  This is a mid-level position.

Other duties include:

  • Preparing plans, specifications, calculations, equipment evaluations, preliminary layouts and technical reports for water and/or wastewater treatment and recycled water system projects.
  • Deciding on the most appropriate engineering techniques and sequences of activities for each project stage, with input from project managers.
  • Completing evaluations of water quality data for treatment facilities.
  • Developing technical writing and correspondence including preparation of technical memoranda, preliminary design reports, master plans and other reports related to the planning and design of treatment systems.
  • Making estimates for timescales and costs ensuring plans meet the client’s specifications.
  • Assisting senior-level engineers with the preparation of proposals.
  • Coordinating project assignments with other EITs, engineers and technicians on the project team.
  • Researching regulatory, legislative, or code issues with City, County, and State agencies.
  • Attending meetings and interacting with clients.

REQUIRED QUALIFICATIONS

  • Bachelor’s or Master’s degree in Civil or Environmental Engineering, or related field.
  • 5+ years of experience preferred.
  • Knowledge of design of water and/or wastewater treatment plants and recycled water systems.
  • Positive and clear written and verbal communication practices are essential for success in this position.

 

Travel Requirements

*This position may require travel to other offices and/or client offices.

A Little About the West Yost Life

You will experience many opportunities to grow and develop professionally with your colleagues through collaborative in-person work experience, knowledge sharing, and mentorship opportunities. We also offer hybrid and flexible work schedules to our employees to help promote and encourage a healthy work/life balance.  All of our team members have access to local and company-wide events, our Diversity, Equity and Inclusion Workgroup, Culture Workgroup, Wellness Workgroup, book clubs, charitable giving and community service, firm-wide resources, peer groups (young professionals & middlers group), and mentorship and leadership programs.  We support and foster your career success and encourage you to be in control of your future with us.

At West Yost, we make space for connection across the firm. Each month, we hold an all-hands meeting that bring together team members from every location, including those working remotely, to stay aligned and engaged. Individual sectors and teams also hold their own monthly meeting. At the local level, our offices host gatherings, from camping trips and river rafting to community events and celebrations.

Once a year, we come together in person for our Annual All Staff event, a firmwide experience focused on learning, networking, and building relationships across teams. That evening, we continue our longest-standing tradition, the Duck Dinner, where West Yosters are encouraged to bring a guest and enjoy a night of great food, connection, and entertainment.

We work hard, and we place equal value on having fun.

Our commitment to quality begins with our hiring practices. We employ the most talented team members in our industry from all backgrounds. We are highly selective of the individuals we choose to represent the firm, seeking only those individuals whose technical abilities and commitment to client service matches our vision for excellence.  We are dedicated to our number one asset, our employees.  Because we are employee-owned, we are responsible for and rewarded by our own success. Come to West Yost where, with our support, you’ll do the best work of your life.

Standard Benefits:

We provide a comprehensive array of valuable benefits to protect your health, your family, and your way of life. Benefits include medical, dental, vision, flexible spending accounts, health saving accounts (with West Yost contribution), paid vacation, paid sick leave and holidays, two employee assistance programs, travel assistance program, 401(k) profit sharing with employer match, leaves of absence with additional supplemental paid time off, parental leave, life and AD&D insurance, short-term and long-term disability insurance, and even pet insurance.

Other Unique Benefits:

You’ll be provided with support in on-going education through our 529 college savings plan/student loan repayment program, tuition reimbursement, paid professional memberships, paid training, and Leadership Academy programs. You’ll be recognized for your contributions at West Yost through milestone anniversary benefits, peer to peer recognition programs, the potential for employee stock ownership, annual monetary and paid time off bonuses, performance-based bonus eligibility, merit increase eligibility, and employee referral bonuses. We also offer a wellness reimbursement.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.