Delivering innovative, results-focused solutions and excellent service since 1988

Sun Engineering is a full-service engineering consulting firm specializing in the energy industry and serving a variety of clients, ranging from oil and gas and renewable energy companies to public utilities and industrial/manufacturing plants. With more than 2,800 diverse projects completed in 17 states and zero lost days, we have a proven track record of meeting our clients' needs.


Why Sun Engineering

Why Sun Engineering

At Sun Engineering, we approach our work in a unique way – we strive for repetition. This allows us to create standards -- an important component of an efficiency-based practice -- for proven, tried and tested systems and methodologies.

We also aim for efficiency through our unique staffing model, which takes advantage of all skill levels as well as advanced technologies. This results in lower costs, reliability and speed, which gives Sun Engineering a competitive edge.

We know what our clients want -- a firm that understands their business, priorities, needs and how to get things done. We have achieved operational excellence by meeting our clients’ needs and delivering quality service and technical expertise.





Founded in 1988, Sun Engineering has been providing a wide array of engineering consulting services for clients in the energy sector, including oil and gas, renewable/alternative energy and utility industries.

We offer engineering, design and systems integration services with expertise in conceptual planning, feasibility studies, cost estimating, front end engineering and design, detailed design, automation programming, permitting, procurement, construction management, commissioning and project startup and closeout.

Over the years, we’ve been involved with engineering and design services for oil and gas production facilities, pipelines, refineries, marketing and distribution terminals, solar power, energy storage, compressed natural gas for car fuel, biofuels, onsite power generation, water/waste water, upgrading and replacing automated valves on utility pipelines, just to name a few.

And, we have successfully completed over 2,800 projects while maintaining our zero lost days record.





Our company leaders, engineers and project managers have extensive experience in many facets of engineering – including electrical, control, automation, civil, structural, mechanical, piping and IT -- with many team members previously working at major energy companies or large engineering consulting firms.





Sun Engineering Founder Eddy Duong has been passionate about projects that utilize science and technology to make our country a better place to live. This has also led to our commitment to sustainable practices in our operations and services to our clients.    

Our efforts involve conserving natural resources, promoting environmental stewardship and minimizing our carbon footprint. We also help clients achieve their sustainability goals by incorporating energy efficient designs and conducting energy efficiency studies. These studies have helped them reduce their energy use and receive hundreds of thousands of dollars in energy rebates.






Safety is paramount to everything we do. And, we have the numbers to prove it. Throughout our work on more than 2,800 projects in 17 states (including Alaska and Hawaii), we’ve had zero lost days.

Our outstanding safety record is attributed to our commitment to provide a safe working environment, eliminate safety hazards and provide our team with the necessary tools to safely perform their jobs. In addition, we embrace a strong safety culture in which all of our employees undergo routine safety training and are encouraged to contribute to finding creative solutions to improve safety.

We view local, state and federal health and safety laws and regulations as the minimum standards and strive to exceed them where possible. We also subscribe to third-party contractor/supplier compliance records management and auditing services, such as ISNetworld ( since 2004 and Avetta ( since 2003.


Supplier Diversity

Supplier Diversity

Sun Engineering is a certified Asian American-owned firm. Our certifications include:

      • Minority Business Enterprise - National Minority Supplier Development Council
      • Minority-Owned Business - California Public Utilities Commission’s Supplier Clearinghouse
      • Small Business Enterprise - California Department of General Services, Port of Los Angeles/Long Beach, Metropolitan Water District of Southern California, LA Community College District and San Diego County Water Authority

Like many of our clients, we make an effort to reach out and support diverse suppliers, including minority, women and veteran business enterprises, and  purchase goods and services from them. 





Whether we’re designing a storage and distribution terminal, relocating a pipeline, automating an industrial plant or conducting an energy efficiency study, we do everything we can to meet the needs of our clients. We’re proud to have served some of the biggest names in the energy industry.

AECOM Engineering Company (URS)

Aera Energy LLC (Oxy)

Aloha Petroleum, Ltd

Alon USA Energy, Inc.

American Integrated Services, Inc.

Americas Styrenics

ARCO Pipeline Company

ARCO Products Company

ARCO Terminal Service Corp.

BP Logistics

BP Pipelines

Brenntag Pacific, Inc.

Burns & McDonnell

Canadian Natural Resources

Chevron Energy Solutions

Chevron Pipeline Company

Chevron Products Company

City of LA, Dept. of Public Work

Clean Energy

Cook Inlet Pipeline Company

ConocoPhillips Refinery

ConocoPhillips Pipeline

Crimson Pipeline, LLC


East Orange County Water District

ECO Services

ERM West

ExxonMobil Pipeline Company

ExxonMobil Torrance Refinery

Four Corners Pipeline Company


GATX Terminals Corp.

Irvine Ranch Water District

Jacobs Engineering Group Inc.

Kern Energy

Kern Oil & Refining Company

Kiewit Infrastructure Group

Kinder Morgan, Inc.

Linde LLC

Los Angeles County Sanitation District

Lunday-Thagard Co.

Martinez Pipeline Company LLC

Matrix Oil Corp.

Messer Americas

Mobil Chemical Company

NRG Energy

NuStar Energy LP

Orange County Sanitation District

Pacific Energy Group

Par Hawaii Refining

Paramount Petroleum Corp.

Phillips 66 Company

Plains All American Pipeline, LP

Plains Expoloration & Production Company

PQ Company

Primafuel, Inc.

Ramcon Industries, Inc.

Rhodia Chemical Co.

Ribost Terminal, LLC

Rio Tinto (U.S. Borax)

San Diego Gas & Electric Company

Santa Fe Pacific Pipeline

Savage Services

SCS Energy

Sempra Utilities

Shell Pipeline Company

Shell Products USA

Southern California Gas Company

Tosco Corporation

Tesoro Hawaii Corporation

Tesoro Logistics

Tesoro Refining and Marketing

Torrance Logistics Company LLC

Torrance Refining Company LLC

Unocal Pipeline Company

Unocal Refining & Marketing

United Technologies

Valero Wilmington Refinery

Venoco, Inc.

Vopak North America

Warren Resources, Inc.

Wespac Energy Group

Westway Terminal Company

Wickland Pipeline Company

Worley Corp.

Zenith Energy

Main Office: 5405 Garden Grove Blvd., Suite 300, Westminster, California 92683 USA