Greater Niagara Mechanical, Inc.

7311 Ward Road, North Tonawanda, NY, 14120
• Founding

About Us


Greater Niagara Mechanical was founded in 2007 by Rodney Siegmann, Christopher Sembert, and Samuel Prezioso. With a combined 65 years of experience in the Mechanical Contracting industry working for Contractors throughout the WNY area in management and technical positions we, at Greater Niagara Mechanical, have the ability to provide a wide array of solutions for your Mechanical System needs.

Rodney Siegmann


Rod brings to the table a vast array of knowledge in mechanical systems from his past experiences as a field technician working to build customer relationships first hand to the position of service manager at one of the biggest mechanical contracting firms in the country. He holds an Associate's Degree in Mechanical Systems and has accumulated countless industry and system specific certifications throughout his 25 year career.

Christopher Sembert

Vice President

Chris has over 25 years of experience as a field technician and project manager in the HVAC Industry. His expertise helped turn an up-start mechanical contracting firm into a successful, profitable, and in-demand organization. Chris holds an Associate's Degree in HVAC Systems along with countless industry related certifications and is a US Army Veteran (CW3, US Army Ret).

Samuel Prezioso

Vice President

Prior to founding Greater Niagara Mechanical, Sam worked as an estimator, project manager, and system designer where he was responsible for the procurement of turn-key mechanical contracts throughout Western New York. Sam holds a Bachelors of Science in Mechanical Engineering from Rochester Institute of Technology (BSME '02) as well as numerous industry and system specific certifications.