About APEC
Advanced Professional Engineering Consultants (APEC) is a mechanical engineering firm in Southern California. We design mechanical, plumbing, and process systems for buildings that cannot afford surprises.
Also, we work on projects ranging from tenant spaces with tight schedules to regulated and mission critical settings. As a result, our designs are practical, code compliant, and built for real world use.
Built for real world project delivery
First, great engineering is not just math. Instead, it is about working together, being clear, and following through.
Because projects move fast, our team works closely with owners, architects, and contractors. This helps reduce field conflicts, improve system performance, and support smoother builds.
What we do
Coordinated mechanical, plumbing, and process engineering
APEC delivers coordinated design across mechanical, plumbing, and process systems. That way, your building systems work together as one complete package.
In addition, our services support commercial, industrial, healthcare, and life science projects across Southern California.
Core services
- Mechanical engineering and HVAC design that supports comfort, uptime, and efficient use of energy
- Plumbing engineering for domestic water, drainage, specialty systems, and utility hookups
- Process engineering for regulated and industrial settings, including clean utilities and process piping
- Commissioning and testing to help systems run as intended from day one
- Facility checks and engineering support that help owners plan upgrades and reduce risk
Industries we serve
We support projects where uptime, performance, and code compliance are key. For example:
- Commercial and tenant spaces (office, retail, hotels)
- Industrial and manufacturing sites (warehouses, production floors, technical spaces)
- Healthcare, labs, and life science spaces with strict standards
- Pharmaceutical sites and regulated production settings where process needs drive the design
Where we work in Southern California
Our mechanical engineering projects span across Southern California. Specifically, we serve clients in Los Angeles County, Orange County, Riverside County, and San Bernardino County. Also, our office in Corona, CA puts us within reach of the Inland Empire, the greater LA metro area, and coastal Orange County.
In addition, we hold engineering licenses in multiple states beyond California, including Washington, Arizona, Nevada, and Utah. As a result, we can support clients with projects in more than one region. This is especially helpful for companies with locations across the western United States.
Project types
As a mechanical engineering firm in Southern California, we work on a wide range of project types. These include new builds, tenant build outs, system swaps, and facility upgrades. Also, we support clients during all project phases, from early planning through construction closeout.
For example, a typical project may start with a facility check to review existing systems. Then we develop the mechanical, plumbing, and process design. Finally, we provide construction phase support to help the contractor build it right.
How we work
1) Start with the outcome, then engineer backwards
First, we align with the Owner’s Project Requirements and the realities of the site, schedule, and local codes.
Then we design systems that match how the building will be used, not just how it looks on paper.
2) Design for easy builds
Next, our approach puts clear documents, coordination, and practical install details front and center. As a result, we help reduce RFIs, change orders, and field conflicts.
3) Support through construction
Finally, when needed, we stay engaged beyond design. This helps keep decisions moving and systems aligned with intent.
Energy and sustainability
However, good energy performance does not happen by accident. It takes careful system selection, smart controls, and follow through.
Therefore, APEC supports energy focused decisions by combining energy compliance with performance driven engineering. In practice, that targets:
- Lower running costs through efficient system selection and controls intent
- Long term uptime through backup planning where reliability is critical
- Practical ways to improve existing buildings through facility checks and commissioning
Licenses, standards, and ongoing learning
APEC engineers are licensed across multiple states. Specifically, they hold licenses in California, Washington, Arizona, Nevada, and Utah.
Also, we stay current through active work in industry groups, including ASHRAE, ASPE, NFPA, ISPE, and the Building Commissioning Association, among others.
Why clients choose APEC for mechanical engineering in Southern California
- Speed without shortcuts: coordinated documents that support permitting and construction flow
- Technical depth: mechanical, plumbing, and process skills for complex settings
- Clear updates: practical answers, fewer surprises, and decisions that stay aligned with the project goal
- Results that last: designs that focus on performance, energy savings, and long term uptime
FAQ
What does APEC engineer?
We design mechanical HVAC systems, plumbing systems, and process related systems. Also, we deliver integrated engineering services for commercial, industrial, healthcare, and life science buildings.
Do you support mission critical and regulated sites?
Yes. We support settings where uptime, compliance, and nonstop operation are key. For example, we work on industrial, healthcare, lab, and pharmaceutical projects. Also, we design systems for data centers, cleanrooms, and other spaces where cooling and air quality are critical to daily operations.
Where do you work in Southern California?
We support projects across Southern California, including Los Angeles, Orange County, and the Inland Empire.
Ready to plan your next system upgrade or project?
If you need mechanical engineering in Southern California with strong coordination, buildable documents, and solid performance, talk with APEC.
We will help you define the needs, reduce risk, and deliver a system that works on day one and keeps working long after turnover. Call us at 949-756-0409 or visit our contact page to get started.