About On-Site Health & Safety Dispatched Service

On-Site was founded in 1996 by Virginia Siegel, CEO and Zulema Garcia, CFO. They started their mission in the San Francisco Bay Area, California, providing only drug testing services to the local refineries during shutdowns. One foreign body in the eye later… and their idea for a 24-hour mobile first-aid response was born. Like most ground-breaking businesses, the path held many challenges along the way, but by keeping their core values of respect, responsibility, and honesty in the forefront, On-Site has continued to provide the finest mobile health and safety services available to employers. Over the years, the list of services has grown to include: 24-hour first-aid response, respiratory services, drug testing, audiometric services, training classes, and much more! On-Site has expanded into numerous states across the country and continues to strive towards a nationwide reach.

On-Site's diverse list of services include: 24-hour first-aid response, respiratory services, drug testing, audiometric services, and a host of others that encompass a broad spectrum of health and safety services to meet the needs of any company...large or small. With exceptional customer service remaining the core value the company was built on...On-Site Health & Safety continues to lead the way by providing the benchmark by which industry-leading health and safety services are offered today.

For twenty years and counting, On-Site Health & Safety's industry-leading services have set the bar regarding 24-hour mobile response.


Best Of All

At every level of employment with On-Site Health and Safety, you’ll have the opportunity to contribute to making a difference in the workplace.

Our Technicians

Empowered with the responsibility to ensure the highest level of service and satisfaction.

Our Dispatchers

Tasked with providing top-level customer service by managing our commitment to deliver timely service throughout the country.

Our Admin

Ensures organizational success through support and efficiency.

What We Offer

Join the On-Site team today and discover for yourself what sets us apart

Health & Wellness
  • check-icon Medical
  • check-icon Dental
  • check-icon Vision
  • check-icon Wellness Programs
Life After Work
  • check-icon 401(K)
  • check-icon Profit-Sharing
  • check-icon Incentives
  • check-icon Scholarships
Time To Rest
  • check-icon Paid Vacation
  • check-icon Team Retreats
  • check-icon Company Trips For You And Your Family
Areas Served 24-HOURS

Santa Rosa – Marin – Sacramento/Solano Oakland/Bay Area – San Francisco – San Jose San Luis Obispo – Santa Barbara Modesto/Stockton – Fresno – Bakersfield Los Angeles – Riverside – San Bernardino Orange County – San Diego


Phoenix – Prescott – Scottsdale Tucson – Yuma

View All Served Cities

What Our Clients Say


I first worked with On-Site Health and Safety while working in construction safety for a large mechanical contractor, yet recently made the move into retail, becoming the Corporate Risk Manager for WSS Shoe Stores. I quickly made meeting with On-Site a priority to discuss whether or not we could achieve the same results of lowering our recordable incident rate in retail as they did in construction, and we decided to give it a shot. Did it work?...YOU BET! A full 90% of the cases they handled for us in 2015 were managed as first-aid only. I am here to tell you, Onsite Health and Safety is NOT just for construction. They have been equally successful for me in the retail industry. With a company as expansive as WSS (75 locations in California, Arizona, and Las Vegas, Nevada)...we make sure the poster for On-Site Health and Safety is on the wall in the break room of every one of our 75 stores!

Joe Rodriguez

Risk Manager—WSS Shoes


On-Site has been working with Flatiron for quite a few years and have been outstanding to work with. Flatiron has used On-Site for First aid treatment, substance abuse testing, and various training. Every tech is professional and courteous. Virginia and Zulema have obtained and manage a great staff. Flatiron will continue to use On-Site’s services and recommend them to anyone who is seeking the services they provide.

Gade Mobley

Benicia District Safety—Flatiron West


On-Site’s services are the foundation to our post incident response. They’re the first call we make in non-life threatening events. The training services they offer are a complement to our already very extensive in house training programs. On-Site picks up what we miss or we use them to add to what we already have. Thanks for being there all these years.

Wesley Baker

North West Regional EHS Manager—Environmental Health & Safety Safway Group Holding


The knowledge imparted regarding exposures and protection were a morale builder for employees as well. Our experiences regarding customer service have been very positive with responsive, real-time, cooperative, and understanding technicians and management.

On-Site’s service is a real benefit to construction employers and should be part of any plan for medical services and first aid compliance. We continue to recommend On-Site Health & Safety’s services to other prospective companies and organizations

Bob Downey

President—Red Consulting


On-Site Health and Safety has been a valued service to us since early 2000. They are a professional organization that continues to provide us with an extensive array of safety services. They help improve our operations by keeping First Aids at the First Aid level, if at all possible, which is good for the company incident rate. I have recommended On-Site Health and Safety to the subcontractors we come across and their name and number are posted on all of our jobsites.

Frank Werbelow, Jr.

Safety Director—DPR Construction Inc


Their First Aid response saved us thousands of dollars in costs. When a worker received a small cut, something in his/her eyes, small burns, or even contusions, small strains, and sprains, On-Site would respond within an hour to the job site where the individual was injured. 99% of the time, the injury would remain a first aid case.

Ken Esse

President—ESSE Construction Safety Support, LLC


On-Site’s staff and technicians are professional, courteous, and knowledgeable, and response times are always within an hour. All of our cases to date have remained First Aids, costs have been kept low, and the negative effects of the injuries (time wasted sitting at a clinic, loss of productivity, adverse impact on incident rate) have been kept to a minimum.

Sharon Barowsky

Risk Control Manager—Rosendin Electric


On-Site Health & Safety provides trained, experienced and prompt professional care to injured employees. NOVA Group is extremely satisfied with their ability to arrive quickly and provide first aid. We highly recommend their services.

Cole Davis

Safety Director—NOVA Group

Areas Served 24-HOURS

For over twenty years and counting, On-Site Health & Safety's industry-leading services have set the bar regarding 24-hour mobile response.