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Excellence in underground engineering since 1970. Specialties: storm drains, water, sewer, fire protection, natural gas, excavations and more.

Explore Company

Premium underground electrical systems that keep communities running. Specialties: public utilities, telecom, joint trenching, security and more.

Explore Company

Excellence in underground engineering since 1970. Specialties: storm drains, water, sewer, fire protection, natural gas, excavations and more.

Explore Company

Quality. Integrity. Service.

The Preston Companies bring extensive expertise and hands-on partnership to complex projects. Our services include excavating and installing underground wet and dry utilities, soils testing and management, and fill site management.

About Preston


Success Starts Here

Excellent management has always been a foundational element of Preston Companies’ success. As we’ve grown, both financially and geographically, we’ve maintained a small business atmosphere focused on relationships. As new employees enter our dynamic and fulfilling work environment, they are trained and mentored to be responsible for their projects, and to develop a sense of ownership in the company as a whole.

Current Openings

Working Here

As part of the Preston team, you will be surrounded by smart, ambitious and hard-working team members. We provide opportunities to be a part of something meaningful, to challenge yourself and to learn new skills.

We provide career growth opportunities, company vehicles, in-house training and development, community service, sporting and entertainment events, company parties and more. Additional benefits include:

  • Medical, Dental and Vision Benefits
  • Competitive Compensation
  • 401K
  • Life Insurance
  • Profit Sharing
  • Mentoring and Development
  • HSA and FSA benefits
  • Escalating PTO Program

Current Openings


If you are bright, energetic, talented, and team-oriented, there are many internship opportunities available within the Preston Companies. You will be paired with teams of experts, as you learn a craft on the job. Please email your resume to our HR Team if interested in a year-round or summer internship.

Preston's HR Department
(408) 262-1418

Core Values



Our focus is to provide every client with unparalleled service. We build and maintain long-term relationships. Repeat business is an essential component of our success.



We are committed to providing a safe work environment for all our employees. We demand that safety never be compromised.



Hard work, honesty, loyalty, and talent are valued and rewarded. All people (employees, customers, suppliers) deserve to be treated with the utmost courtesy, concern, and respect.



Is in everything we do. From our people, to our equipment fleet to the completion of projects, our high standards of quality are never compromised and our standards of quality are the source of our reputation, success, and personal satisfaction.


Financial Responsibility

Financial decisions are made for the long term benefit of our company and employees. We believe this is crucial to our stability and longevity.


We are committed to building strong client relationships founded on service, integrity, and quality.

Our dedicated people take a proactive approach to recognize our customer’s needs and exceed their expectations.


We will enthusiastically pursue opportunity to grow and excel. We will be the market’s contractor of choice.

We will be a great place to work.

Quality, Integrity, Service. It’s the way we do business.

Current Openings

We are always looking for more talent.
To view all current openings and to apply online, click the link below!

Apply Here!

Job Title Company Department
Heavy Duty Truck Mechanic PrestonPipelines Operations
Cost Engineer/Estimator PrestonPipelines Estimating - West Sacramento and Milpitas locations available

How We Help You

We take the time to learn about your specific needs and pain points to develop solutions that will have the greatest impact. Select a role below and see how Preston can support your needs!

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