Meet the Team at Solar Gain, Inc.

Roman Black

President / CEO

The President of Solar Gain, Inc. for the last 5 years, Roman has significant experience in commercial solar project development and sales. After earning his degree in Finance from the University of Arizona, Roman spent several years in Costa Rica expanding his knowledge and skill set in sustainable industries. While in Costa Rica, he served as project manager for the construction of custom homes that integrated LED lighting, rainwater harvesting, black water recycling and solar and wind power.

At Solar Gain, he runs the show but especially enjoys matching the customer with the right financing. Roman is a founding board member of the Southern Arizona Green Chamber of Commerce.

Tim Graunke

Project Development

Tim was born and raised in Tucson, AZ and is the oldest of 5 siblings. He went to Salpointe HS graduated University of Arizona in 2007 with a bachelor of economics. In early 2008, Tim moved to Honolulu & started a career in solar. Early experience as project and construction manager led to strong knowledge and understanding of installation and what it takes to complete projects on schedule within budget. He soon became lead commercial project manager for one of Hawaii's top companies in 2011. Later, he returned to Tucson and started working with Solar Gain in late 2015 developing projects pre & post contract execution.


Ron Leuzinger

Chief Financial Officer

Ron came to Solar Gain in early 2017 with nearly 30 years of leadership experience in various finance and operations management roles.  Upon graduating from the University of Wisconsin with degrees in Accounting & Finance, he began his career in public accounting with Ernst & Young where he earned his CPA certification.  Ron has led process improvement initiatives in multiple manufacturing, engineering design, and project management enterprises in the water treatment and aerospace sectors.  Most recently, Ron spent 16 years in the medical device industry as part of Smiths Medical and Teleflex, focused on supply chain strategy and product cost optimization.

While Ron now makes his home in Tucson and enjoys motorcycling, biking, and hiking in his spare time, he remains faithful to all things Wisconsin – including Packers, Badgers, and cheese.

Max Martin

Vice President

If there’s a solar installation challenge, Max knows how to solve it! Max gained his invaluable experience through many years in the Special Events industry where he installed large temporary commercial structures, electrical distributions, lighting and HVAC in various locations throughout the US. He also brings extensive experience in residential electrical design, layout and installation to our team.

Jeremiah Mosij

Marketing & Sales Director

Jeremiah has been working in the sustainability sector for over seven years. His father is a general contractor, so construction has been a way of life at a very young age. Before finding his home at Solar Gain, Jeremiah was certified as a Rainwater harvesting practitioner under the instruction of Brad Lancaster and Lincoln Perino. When Jeremiah is not out saving the world, you can find him playing in a local Spaghetti Western band called Hey, Bucko! in downtown Tucson.



David Schildhouse


David brings 10 years of experience in the automotive service and management field to the Solar Gain team.  A graduate of Sabino High School in Tucson, he began his career as an ASE certified automotive technician.  David developed and refined his management skills while working with leading companies like Bridgestone/Firestone, Audi and Toyota.  In 2011, he worked with a NASCAR team as a mechanic and spotter, traveling to racetracks across the country each weekend and living his childhood dream.

After years spent in Atlanta and Las Vegas, a career change in 2015 brought David back to Tucson and into the accounting field.  He is on track to graduate with a degree in Accounting in 2017 while continuing to learn the unique and exciting business of sustainable energy solutions and solar power installations.

Brian Smith

Commercial Superintendent

Brian is a NABCEP certified PV installation professional with more than six years of experience in both residential and commercial PV projects throughout southern Arizona. With a Bachelor’s Degree in mechanical engineering & additional photovoltaic training, he uses his advanced education to oversee the multiple facets of complex photovoltaic installation projects. Brian is also Involved in solar guild, a local nonprofit that develops solar projects that benefit the community. Through solar guild he has led numerous projects, including biosphere 2 and Catalina state park.

Max Chellemi

Project Engineer

Born in Costa Rica and graduated with a B.S. in General Engineering from Cal Poly, San Luis Obispo, Max Chellemi is a bilingual construction machine. After helping start iCracked, an iPhone repair company in Silicon Valley, he returned to San Luis Obispo to become a Cell Site Acquisition expert where he served contracts for AT&T primarily. He went on to gain residential and commercial construction expertise as he built a house in Costa Rica and estimated, project engineered, and project managed for an electrical contractor in Southern California.

Childs Wilson Hultquist

Residential Project Manager

Wilson is from Arizona/Sonora. He studied Marketing & Media Management at Colorado Mountain College in Steamboat Springs, CO. Additionally, he graduated Film Production at Vancouver Film School. Wilson joined the Solar Gain team in 2013. At Solar Gain, Wilson films & photographs P.V. Solar installations for web and print publication. Check out his videography on the Video Gallery page.

Matt Hicock

Residential Superintendent

Matt is a 30-year native to Tucson, AZ and has 9 years invested to the photovoltaic trade. Quality is his number one priority, believing that if it's worth doing at all, it's worth doing right. In addition to his commitment to the industry and his clients, he also serves as a Petty Officer Third Class Reserve Air crewman in the US Navy. Hoo Yah!

Sol Hassler

Commercial Designer

Mr. Hassler has 8 years of solar installation and design experience. He holds an Associate’s Degree & a NABCEP Solar Electrical Installation Certification. His position with Solar Gain Inc. is Lead Commercial Designer. Sol has made Tucson his home for the last 10 years and has a deep fascination with sustainable design. He is always perusing several personal projects outside of work, the subject matter of which varying greatly.

Brian Reising

Residential Designer

Brian Reising is originally from Las Vegas, NV. Although Vegas had it’s fair share of job opportunities, Brian wanted to change it up a bit. He moved to southern California for a couple of years and worked in the solar industry. However, he decided California wasn't the place that he wanted to be. Instead, he decided to try my luck in Tucson, which is where he began working with Solar Gain Inc.

Will Lawton

Warehouse Manager

Being born & raised in Tucson, Arizona, Will understood the importance of conserving natural resources. It was evident early on that his career path & studies in college would need to include something that involved conserving the environment. Will majored in Natural Resources: Conservation and Management at the University of Arizona. Upon graduating, he came across the opportunity to work for a solar company, which was a great way to get into conserving precious natural resources, while also being a part of an expanding effort to develop & produce renewable energy.

Brett Lange

Electrical Superintendent

Brett is an electrical superintendent/ lighting specialist. He is a native Tucson resident, proud family man, Scouter, and father of 2. He has 30 years of electrical experience in the alternative energy& electrical fields including years of experience in the lighting design field.

Santino “Sonny” Perez

Lead Technician

Sonny was born and raised in Tucson, Arizona. He has been installing P.V. Solar for 4 ½ years. “I started at solar gain in 2014, I love working for this company, couldn’t ask for better co-workers and the bosses are great Huge to be with this company as we continue to grow, Thank You Solar Gain!”

Xavier Felix

Field Technician

Xavier is a native Tucsonan. He worked in the structural steel trade for two years before getting into the solar industry. He is an experienced welder beginning the art at 9 years old. In his free time, Xavier loves to golf.