About Air Control Systems
Over three decades of honesty, integrity, and technical excellence — keeping Southern California comfortable since 1991.
Always Customer Service — Always
Air Control Systems was founded in Ontario, California in 1991 with a singular commitment: to deliver commercial HVAC services with uncompromising honesty and integrity. That commitment is embedded in our name — ACS stands for Always Customer Service.
What began as a small local contractor has grown into one of Southern California's most respected full-service commercial HVAC companies, with over 150 employees, 290 million square feet built, and more than 2,840 active commercial properties under our care.
We serve LA County, the Inland Empire, San Bernardino, Riverside, Orange County, and San Diego — bringing the same standards of quality and accountability to every single job, regardless of size.
Work With UsThree Decades of Growth
Founded in Ontario, California
Air Control Systems opens its doors in Ontario, CA, with a core focus on commercial HVAC installation across the Inland Empire — built on honesty and a relentless commitment to customer service.
Service & Maintenance Division Launched
ACS expands beyond installation to offer comprehensive preventative maintenance and 24/7 emergency repair services, building recurring relationships with commercial property managers.
Building Automation & Controls
ACS establishes its building automation controls division, enabling clients to optimise energy use and gain real-time operational visibility across their commercial portfolios.
LEED Certification & Energy Sustainability
ACS achieves LEED certification through the USGBC and becomes a recognised Southern California Edison Gold Rooftop Partner, leading the region's shift to energy-efficient commercial HVAC.
150+ Employees & 5-County Expansion
ACS grows to 150+ employees and expands service coverage to all five Southern California counties: LA, San Bernardino, Riverside, Orange County, and San Diego.
2,840+ Active Properties & Counting
ACS continues to grow, now maintaining 2,840+ active commercial properties and delivering over 290 million square feet of HVAC excellence across Southern California.
Our Core Values
Every decision, every project, every interaction is guided by these principles.
Honesty & Integrity
We tell the truth — about scope, about timelines, about costs. You'll never be surprised by hidden fees or inflated proposals.
Safety First
A safe job site is a quality job site. ACS maintains rigorous safety protocols on every project, protecting our team, your property, and your tenants.
Continuous Excellence
NATE-certified technicians, ongoing training, and industry partnerships ensure our team stays at the forefront of HVAC technology.
Community Partnership
As a Southern California company, we invest in the communities where we work — building long-term relationships, not just transactions.
The People Behind ACS
From leadership to the field, our team of experienced professionals delivers the quality and accountability Southern California counts on.
Leadership
Bob Leotaud
President & CEO
Marc Leotaud
Chief Financial Officer
Chad Williams
VP of Preconstruction
Jacqueline Leotaud
Director, Shared Services
Vanessa Serrano
Manager, Shared ServicesProject Management
Leo Carrillo
Director of Project Management
Eric Elia
Senior Project Manager
Francisco Ulloa
Project ManagerService & Maintenance
Phillip Leotaud
Director of Sales, Service/Maintenance
Finis Washington
Service Manager
Pedro Lopez
Field Supervisor, Service/Maintenance
Matt Wright
Field Supervisor, Service/Maintenance
Richard Terrell
Field Supervisor, Service/Maintenance
Gary Bittner
Service Account Manager
Alex Zendejas
Service Account Manager
Art Lara
Service Account Manager
Craig Petrovich
Service Account ManagerHVAC Construction
Temo Rodriguez
General Superintendent, HVAC Construction
Raymond Moore
Field Supervisor, HVAC Construction
Julian Martinez
Field Supervisor, HVAC ConstructionMechanical Retrofit
Dave Weis
Manager, Mechanical Retrofit
Eddie Pena
Field Supervisor, Mechanical Retrofit
John Dixon
Business Development Manager, Mechanical Retrofit
Frances Gonzalez
Project Manager, Mechanical RetrofitBuilding Automation & Controls
Jason Ness
Controls Manager
Robert Piascik
Controls Application EngineerMechanical Piping
Juan Gonzalez
Field Supervisor, Mechanical PipingCertifications & Partnerships
Our credentials reflect our commitment to technical excellence and industry leadership.