Meet The Commercial Experts
Mark Whitlock
Started working in HVAC/R in 2001. I spent my first year as a Residential & Light Commercial HVAC Installer. When that business closed, I became a Service Technician for MAS Service, an HVAC/R company that specializes in Restaurants. Through my 2 years working there I gained a working knowledge in HVAC, refrigeration, and ice machines. I had a serious car accident in 2004 and after a slow recovery, shifted to working in wholesale at RSD in 2007. As I learned and mastered all aspects of branch operations and counter sales, my responsibilities grew to include various product specialist roles, including Fujitsu, Ruud, Copeland, Belimo, Honeywell, and Johnson Controls. I also spent my last two years doing outside technical sales of these product lines when needed. After 11 years at RSD, I decided in 2018 to leave California to escape the commute traffic and extreme cost of living, and moved to Reno, NV. After visiting all the Wholesalers in Reno during a scouting trip, I found a new opportunity with Johnstone Supply in Sparks. I initially accepted a role at the counter, but shortly after I started, the TM position opened up, and I asked for the opportunity. During my year in the TM position, I learned more about Outside Sales and taking care of the customer on a more personal level. In October 2019, I was offered a recently opened position that more closely aligned with my skill set, Technical Service Advisor. I was extremely excited to get this opportunity, as I have always loved learning new things and teaching what I know. I have been in the TSA role for 2.5 years now, and I am enjoying it even more now than when I accepted it. After extensive factory training from the vendors and constant education, I feel that I have become a true specialist on the Fujitsu and Coleman product lines. Along the way, I have added the additional specialties of Commercial Project Design and Estimation, especially on the Fujitsu Airstage product line. With my field experience, 11 years at the parts counter, outside sales knowledge, and multiple product specialties, it allows me to bring my knowledge to help solve customers and coworkers when issues arise.
Jared Souza
I have been in the HVAC industry since 2016. Initially I began as a student at Institute of technology, obtaining the necessary knowledge required to become a certified HVACR technician. From there, I began applying my craft with All Temp Refrigeration, working primarily in commercial applications. I left All temp in 2018, climbing into the sales arena which led me to taking a territory sales manager position with Geary Pacific. I am a self motivated, driven and service minded account manager who thrives when working in an environment with like minded team players. My hobbies include hunting, fishing, and spending quality family time out on the lake.
Comprehensive Commercial Services Built for Your Business
​At Johnstone Supply Commercial Services, we deliver expert solutions for every stage of your building’s lifecycle. From new construction to replacement, system design to aftermarket parts, our team provides the knowledge, resources, and support to keep your commercial space running smoothly, efficiently, and reliably.
Our Specialized CommercialServices
Assist with Design Build
We can review custom HVAC and refrigeration solutions designed and built to meet the specific needs of your facility. We collaborate closely with you to help ensure performance, efficiency, and long-term reliability.
OEM Parts
We stock a wide range of Original Equipment Manufacturer (OEM) parts to ensure your systems perform exactly as designed—with the right parts, at the right time.
VRF
Energy-efficient, flexible climate control for large or complex buildings. Our VRF expertise helps you reduce operational costs while maximizing comfort and control.
Facility Maintenance
From preventative care to emergency service, we provide comprehensive maintenance programs tailored to your facility’s specific systems and needs.
Unitary Systems
Expert support for packaged and split HVAC systems. Whether for rooftops or indoor spaces, we offer unitary solutions that deliver dependable performance.
New Construction
Supporting developers and contractors with full HVAC and refrigeration system design, supply, and installation for new commercial builds.
Replacement
Upgrading outdated or inefficient equipment? We provide turnkey system replacement, ensuring minimal disruption and maximum energy savings.
Refrigeration
Commercial refrigeration solutions for retail, food service, and industrial applications. From walk-ins to chillers, we’ve got your cooling needs covered.
Plan & Spec
Precise, engineered-to-spec solutions that meet your project's drawings, performance requirements, and compliance standards.
Boilers & Chillers
Reliable solutions for large-scale heating and cooling applications. We support both retrofit and new installations with top-tier products and expertise.
Indoor Air Quality (IAQ)
Creating healthier, more productive spaces with IAQ solutions that include filtration, ventilation, and purification systems.
Aftermarket Solutions
From controls to retrofit kits, we carry a wide array of aftermarket products to extend the life and improve the performance of your existing systems.
Tenant Improvement
We help modify and upgrade systems to suit new tenant requirements—ensuring comfort, code compliance, and energy efficiency.
Government Projects
We’re experienced in servicing municipal and government facilities, meeting stringent standards and providing documentation and support every step of the way.