To build a better solar energy operation, you need a proven construction partner with the experience to create the right plan, meet every deadline and stick to your budget. To manage your site, you need a partner with the operational expertise to troubleshoot and repair any issues that arise, safeguarding your investment. To maintain your sites, you need a partner that has the expertise, in house, to effect long term maintenance solutions allowing your operation to concentrate on making power as efficiently as possible.

You need OnSite Solar. Your Unlimited Resource.

Turnkey or A la Cart You Can Count on Us from Start to Finish

We can perform all aspects of your energy project or provide any mix of needed services to your team. Whatever you choose, you'll know your partner is sensitive to the projects long-term maintenance needs and always keeping operational efficiency in mind.

Solar Construction Solutions

  • • Site Civil work - including Clearing, Grading, Drainage, Access Road Construction, SWPPP, Fencing, Grading and Seeding
  • • Post, Racking and Module Installation
  • • Low and Medium Voltage Work
  • • Customer Pole Installation
  • • Site Commissioning Services

Operations & Site Maintenance

  • • Weed Abatement
  • • Snow Removal
  • • Module Cleaning
  • • Low and Medium Voltage Troubleshooting and Repairs
  • • Data Acquisition System Troubleshooting and maintenance


Proven, Powerful and Focused.

Our Heritage

Born as a Construction and Maintenance Services Company in 1998, OnSite Companies has been providing clients with quality building solutions for decades. For the last several years, OnSite Solar, LLC has grown to become our largest division. Today, we have developed the in-house expertise to perform C&I scale, turnkey solar installations across the northeast US, becoming the second largest installer in NY State.

Our Mission

We build and maintain Commercial and Industrial scale solar projects across the Eastern US with a current focused effort in NY State. We assist owners and EPC developers achieve project success by providing high quality construction services at reasonable market rates. Our focused, turnkey approach, allows our clients to develop several projects simultaneously without continuous on-location oversite. We handle the details so you don't have to.

our onsite team

B. Scott Gillespie


With more than 30 years of business ownership and management experience, 20 years as owner of OnSite Companies, Scott has overseen the construction of hundreds of millions of dollars' worth property over his career. He still serves the first OnSite customer and leads more than 60 employees. Scott graduated from Ithaca College in 1989 with a Bachelor of Science degree in Business Management. Today he is responsible for all financial decisions, business direction planning and execution of OnSite Companies and OnSite Solar.

B. Scott Gillespie

Brian J. Walters

Senior Vice President, Solar Construction Services

With strengths in both sales and construction, Brian was instrumental in the early growth and development of the Construction Division of OnSite Companies. Brian sold and managed several million dollars of commercial construction and developed an asphalt management program to help private institutions maintain and improve asphalt infrastructure with a controlled programmatic approach. Prior to joining OnSite, Brian was the Director of Business Development for Camp Dresser and McKee. Brian received a Bachelor of Science degree in Construction Management from Utica College of Syracuse University in 1997.

Brian J. Walters

Bill Coon

Project Manager

With more than 25 years' experience in construction, engineering, project management and quality assurance, today Bill is the lead project manager and estimator at OnSite Solar. He is a NABCEP Certified PV Installation Professional who manages our production crews, schedules all work, coordinates and orders all materials, oversees safety and coordinated subcontractors as needed. Bill graduated from Syracuse University in 1997 with a Bachelor of Science degree in Mechanical Engineering.

Bill Coon

Angelo Emmi

Senior Vice President, Construction Operations

Kevin Gordon

Project Manager

Mike Yaple

Construction Superintendent

Tom Hewitt

Construction Superintendent

Mike Wilkinson

Construction Superintendent

Jared Brown

Construction Superintendent

Greg St.Mark

Construction Superintendent

Cypress Creek entrusts their first NY State project to the OnSite Solar team.

Cypress Creek – Jefferson Lewis BOCES, Watertown NY

OnSite Solar was the turnkey installation contractor chosen for Cypress Creek's first project in NY State. Choosing the OnSite team allowed Cypress Creek to concentrate their internal resources on completing other projects out of state.

The site offered some interesting challenges. Every post had to be pre-drilled due to the shallow rock ledge encountered during surveying. All post holes were compacted with stone dust then piles were driven to depth. Winter came very early and temperatures reached -15F in mid-November. OnSite deployed additional manpower and equipment resources to be sure that the project finished before the years' end. It was a privilege to be working with the Cypress Creek team and to provide new solar power production for the area.

Our Featured Project

"OnSite Solar exceeded my expectations on this project with their responsiveness to issues and ability to work through hurdles that were outside of their scope. When we had to push a truncated schedule for completion by the end of the year, their team stepped up without hesitation. The exceptionally rough site conditions, inclement weather, and extra hours did not phase them. For our first New York State project, I am very glad that we went with OnSite Solar for our turn-key construction solution."

David W.

Cypress Creek Renewables

You need OnSite Solar. Your Unlimited Resource.

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