• Delta Mechanical Contractors

About Delta Mechanical Contractors, LLC


Bruce A. Bookbinder

Bruce A. Bookbinder


With over 40 years in the plumbing and mechanical contracting industries, Bruce has successfully owned and managed Delta Mechanical Contractors, LLC to be one of the premier contracting operations in New England.

After graduating from the University of Miami, Bruce joined his family’s plumbing and heating business. Through the years, Bruce developed relationships with the prominent general contractors in the area. In 1991, Bruce and David Greenberg formed Delta Mechanical, Inc. Today, he continues to maintain and expand his business base, and is constantly forming new alliances.

Bruce, as sole owner of Delta Mechanical Contractors, LLC, continues to be involved in every aspect of the business. From sales and estimating to purchasing and management of the projects, Bruce actively ensures the satisfaction of his customers.

David M. Greenberg

David M. Greenberg


In addition to being a co-founder and owner of Delta Mechanical, Inc., David has had over 30 years of construction finance and management experience. Remaining with Delta through the KeySpan years and the re-purchase of the company, David acts as the liaison between the business operation and the financial community. His financial background has helped Delta Mechanical secure high bonding capacities and lines of credit. David’s ability to develop business plans, as well as prepare and analyze financial information, has helped Delta negotiate through the toughest of economic conditions.

Upon his graduation from Boston University with a Bachelor of Science in Business Administration and earning a Master of Science in Taxation from Bryant College, David was employed by an international public accounting firm where he was introduced to the construction industry. David then worked as the Vice-President of Finance for Marshall Contractors, Inc., and later as an independent CPA.

Jeffrey Bookbinder

Jeffrey Bookbinder

Chief Estimator

Jeffrey has been the primary estimator for Delta Mechanical for the last 15 years. With over 45 years of experience and his exceptional ability to visualize a project from a set of plans and specifications has allowed Delta become one of the most successful mechanical contractors in the region. After graduation from Clarkson University, he joined the plumbers and pipefitters union and worked on many projects learning the trade. He worked for his family’s business as a plumber and then in the office as an estimator. His 25 years of hands-on experience on the jobsites as a craftsman provides him with knowledge of every job-site condition and manpower requirements.

Plumbers and Pipefitters Local Union 51 (Serving RI and Southeastern Mass)
11 Hemingway Drive
East Providence, RI 02915
p: 401.943.3033

Road Sprinkler Fitters Local Union No. 669 (Serving RI, CT and Western Mass)
7050 Oakland Mills Road – Suite 200
Columbia, MD 21046
p: 410.381.4300


Our Delta family includes many more essential employees. From our Purchasing Agents to our Project Managers to our Commissioning Department, our company has retained many long-term employees that provide quality and excellence to the industry. With strong work ethics and loyalty, the individuals at Delta unite to provide successful projects to our customers and project owners.


Delta Mechanical’s labor force is comprised primarily of union plumbers, pipefitters and sprinklerfitters. Being able to draw the most experienced of workers from a union hall ensures available skilled craftsmen at all times. These tradesmen and apprentices take pride in their work and in our projects. Many of these men and women have been with Delta since the Company was founded in 1991.

These are our principal sources of labor. When we are awarded a project outside the jurisdiction of these unions, reciprocity with other locals allows us to hire tradesmen from outside our local. We currently have reciprocal agreements with Plumbers Local 12 & Pipefitters Local Union 537 in the Boston area and Plumbers & Pipefitters Local Union 4 in the Western Massachusetts area, as well as Sprinklerfitters Local Union 550 for Boston and Cape Cod. This gives us the freedom to bid work beyond the reach of our current locals while still maintaining cost effectiveness for our clients.


Delta Mechanical’s extensive customer base ranges from Fortune 500 companies to the store owner down the street. Here is a sampling of our customer list:

Roger Williams University – Bristol, RI
Mohegan Sun Tribal Gaming Authority – Uncasville, CT
State of Rhode Island – Providence, RI
University of Rhode Island – Kingston, RI
Women & Infants Hospital – Providence, RI
Rhode Island College – Providence, RI
Blue Cross Blue Shield – Providence, RI
Community College of Rhode Island – Warwick & Lincoln, RI
MicroChem Corporation – Westborough, MA
Department of the Navy – Newport, RI & Groton, CT
City of Providence – Providence, RI
US Department of Veterans Affairs – Providence, RI & Brockton, MA
Brown University – Providence, RI
RBS Citizens Bank – Warwick, RI
Johnson & Wales University – Providence, RI

Gilbane Building Company – Providence, RI
A.F. Lusi Construction Company – Greenville, RI
H.V. Collins Company – East Providence, RI
Dimeo Construction Company – Providence, RI
Maron Construction – Providence, RI
D.F. Pray, Inc. – Seekonk, MA
Bacon Construction – East Providence, RI
Agostini Construction – East Providence, RI
Daniel O’Connell’s Sons, Inc. – Holyoke, MA
ADS Construction – East Providence, RI
Ahlborg Construction Corporation – Warwick, RI
CAPE Environmental Management – Columbia, MD
C.E. Floyd Company, Inc. – Middletown, CT
Dellbrook Construction, LLC – Braintree, Ma
The Haskell Company – Jacksonville, FL
Iron Construction Group – Warwick, RI
KBE Building Corporation – Farmington, CT
Lee Kennedy Co., Inc. – Quincy, MA
Legion Construction, Inc. – Chelmsford, MA
Lincoln Construction Group LLC – Newton, MA
The Nutmeg Companies – Norwich, CT
Orlando Annulli & Sons, Inc. – Manchester, CT
Shawmut Design & Construction – Providence, RI
Suffolk Construction Company – Boston, MA
Tower Construction Corporation – Cranston, RI
Wu & Associates, Inc. – Cherry Hill, NJ


Safety on the project site is vital to all. That is why our safety motto stresses the importance of employee awareness regarding “safe” working practices. Through education and training of our employees, along with a compelling Safety Program, Delta has been able to engage its workforce to actively participate in making each and every job-site a safe job-site.

With an in-house Safety Officer qualified as an OSHA 500 Trainer leading our efforts, we have reached many company goals and continue to improve our safe practices. In addition to performing Job Hazard Analyses (JHA’s) on each job-site, our Safety Officer has established directives to inform our employees of the Company’s mandatory procedures. This process begins on the first day of employment. Weekly “Toolbox Talks” covering a wide array of pertinent safety practices for construction job-sites, are performed by our Foremen and are monitored by the Safety Officer. We have a “zero tolerance” policy with respect to unsafe practices. As a result, our insurance experience modification rate (EMR) remains below industry averages.

© 2022 Delta Mechanical Contractors, LLC