What departments does iSun have?

iSun has employees across 4 departments including Program & Project Management, Human Resources, Engineering, Consultant.

What is the largest department at iSun?

The largest department at iSun is Program & Project Management with 4 employees.

Where are iSun employees located globally?

iSun has employees across 4 continents and 7 countries including Ethiopia, China, India, Iran, Romania.

How has iSun's team size changed over time?

iSun's team has decreased from approximately 18 to 15 employees based on available data.

iSun Employee Directory

Renewable Energy Semiconductor ManufacturingVermont, United States201-500 Employees

iSun is a mid-sized company based in Williston, Vermont, operating in the renewable energy semiconductor manufacturing sector. It traces its roots to 1972 and has worked as an electrical contractor for Fortune 500 companies, delivering projects that range from clean rooms and fiber optic installations to flight simulators and solar systems totaling more than 400 megawatts. The company provides a broad suite of solar services across residential, commercial, industrial and municipal markets, and offers solar-powered electric vehicle charging solutions for both grid-tied and battery-backed solar EV systems. 

Its customer base spans residential to utility-scale projects, with a focus on accelerating the adoption of electrification technologies and solar energy. In March 2024, iSun appointed Robert J. Zulkoski as Chief Executive Officer, marking a leadership transition as the company continues its growth-focused activities.

iSun Global Highlights

North America
21

United States Of America
20
Canada
1

Asia
6

Iran
3
China
2
India
1

Africa
1

Ethiopia
1

Europe
1

Romania
1

iSun's Leadership

J. P.
Chief Executive Officer
Mobile Phone
Email
P. C.
Commercial Project Sales & Development Director
Mobile Phone
Email
C. R.
Corporate Controller
Mobile Phone
Email
S. L.
Director Of Hr
Mobile Phone
Email
A. P.
Project Manager
Mobile Phone
Email
M. T.
Warehouse Manager
Mobile Phone
Email
S. Y.
Project Manager Solar
Mobile Phone
Email
D. S.
Field Foreman
Mobile Phone
Email

iSun Employee Metrics

100%

50%

0%

2026

2025

Accounting
Program & Project Management
Business
Administrative
Consultant
Other

Contact profiles from iSun

Name

Title

Contact Info

Location

Last Update

J. P.
Chief Executive Officer
Mobile Phone
Email
United StatesVermont
Apr 16, 2026
P. C.
Commercial Project Sales & Development Director
Mobile Phone
Email
United StatesKentucky
Jun 24, 2026
C. R.
Corporate Controller
Mobile Phone
Email
United StatesVermont
Apr 16, 2024
S. L.
Director Of Hr
Mobile Phone
Email
United StatesVermont
Jun 08, 2026
A. P.
Project Manager
Mobile Phone
Email
United StatesNew York
Jun 19, 2026
M. T.
Warehouse Manager
Mobile Phone
Email
Oct 16, 2024
S. Y.
Project Manager Solar
Mobile Phone
Email
CanadaOntario
Apr 28, 2025
D. S.
Field Foreman
Mobile Phone
Email
United StatesVermont
Apr 17, 2026
A. G.
Special Projects
Mobile Phone
Email
United StatesSouth Carolina
Oct 17, 2024
A. M.
Independent Board Member
Mobile Phone
Email
Oct 16, 2024

Frequently Asked Questions

What is iSun known for?

iSun was founded in 1972 operates in the Renewable Energy Semiconductor Manufacturing industry. The company's main headquarters is located in 400 Avenue d Williston, Vermont 05495 United States. Explore iSun's company overview page for more information.

What is iSun's most common email format?

iSun employees' email format typically follows the pattern of . Trying to find reliable and up-to-date employee contact data? Find more iSun email formats with LeadIQ.

How many employees does iSun have currently?

iSun has approximately 201 employees as of December 2025. These team members are located across 4 continents, including North AmericaAsiaAfrica.

Who are iSun's key employees and leadership?

As of December 2025, iSun's key employees include:

Chief Executive Officer: J. P.
Commercial Project Sales & Development Director: P. C.
Corporate Controller: C. R.
Director Of Hr: S. L.
Project Manager: A. P.

Looking for contact data? Unlock accurate emails and phone numbers for your ideal prospects with LeadIQ.

Everything for prospecting,
in one platform.

What you can expect from LeadIQ:

B2B data verified in real-time
Sync data to your CRM, & add it to an outreach sequence in one click
Integrations with your tech stack for optimal efficiency
A patented AI cold email generator
Account & contact-level job change tracking

iSun Employee Directory

Find iSun employees' phone numbers or email addresses

Name search is limited — try advanced search instead