Geoffrey C. Wilkinson
President/Chief Executive Officer

Geoff currently serves as President and CEO to both George T. Wilkinson, Inc. and Wilkinson Mobile Boilers, Inc. In his position he directs and manages all phases of the firms, from design-build contracting to contract engineering services.

Geoff served in the Naval Reserve Commission and United States Coast Guard. For five years he also served as a second assistant engineer for Mobil Oil Corporation, where he sailed on oil tankers and managed boiler room operations.

He earned a degree in marine and electrical engineering from the Massachusetts Maritime Academy, where he now serves on the Board of Trustees. Geoff also attended Metropolitan College and Wentworth Institute Mechanical Engineering.

Ext. 225 • gwilkinson@gtwilkinson.com

John Sieminski
Service Operations Manager

John's in-depth knowledge of many steam, hydronic and controls operating systems has helped him rise in rank since joining the Wilkinson team in 1986. John holds an Oil Burner Technician License and a Journeyman Pipefitter License. John graduated from the Massachusetts Maritime Academy.

Ext. 230 • jsieminski@gtwilkinson.com

Dave Roche
Installation Supervisor

Dave became a member of the Wilkinson team in 1986 working as a service technician. In 1998 he was promoted to a management position. Dave holds an Oil Burner Technician License and Journeyman Pipefitter License. He graduated from the Massachusetts Maritime Academy.

Ext. 227 • droche@gtwilkinson.com

Geoffrey C. Wilkinson, Jr.
Sales Engineer

Geoff, Jr. became involved in the organization at the early age of fifteen, following in the footsteps of his father and grandfather. Prior to his current position, he worked as a book-keeper and service technician, where he became familiar with the company’s daily operations, finances and technical background. Geoff, Jr. holds a Burner Technician License and Journeyman Pipefitter License. He received a bachelor’s degree in business from Northeastern University.

Ext. 225 • gwilkinsonjr@gtwilkinson.com

David Casoli
Purchasing Supervisor

David joined the Wilkinson team in 1997.  He is known for his attention to detail and exceptional record-keeping and has developed a successful and organized inventory system. An extended background in purchasing ensures his success at Wilkinson. David has more than 20 years of experience in the HVAC/R industry, including his time spent working for a previous family-owned business. He has attended numerous technical courses, classes and seminars.

Ext. 221 • dcasoli@gtwilkinson.com