New York City’s Leading Mechanical & Specialty Contractor, Serving Public Agencies & Contractors in the NYC Infrastructure Construction Market.

Welkin Mechanical is the premier mechanical contractor located in NYC and neighboring areas, specializing in general contracting, heavy mechanical, fire protection, plumbing and HVAC. With an unmatched reputation for the highest quality personalized service, craftmanship and determination, we engage with the best clients and the most challenging and unique projects. Whether we are running 2-foot diameter chilled water lines 30 stories up the exterior of a Manhattan skyscraper, or welding 22,000 linear feet of stainless steel pipe for a roadway snow melting system at the Port Authority bus terminal, our team of professionals has the knowledge and dedication to tackle New York’s most challenging and unique projects. Our core values emphasize integrity, teamwork, respect and accountability, which we employ to provide our clients with the highest level of quality and service.

Building and restoring the infrastructure of New York City is what we do. How we do it is what sets us apart. Our word is our bond and our Mission is a promise to serve every customer with complete professionalism and provide total satisfaction with our work. We also promise an uncompromising commitment to our people; their safety, their sense of worth and their quality of life, both on and off the job.

Welkin is an old English word that refers to the heavens or the sky. At Welkin Mechanical, we see no boundaries to service excellence and accomplishment. For us, the sky is truly the limit.





Mr. Sefershayan has been on the general contracting side of the industry for over 30 years, the last 20 of which were with Judlau Contracting. During his time with Judlau, in an executive capacity he led and developed teams, completing over a dozen public work projects, ranging from $3 million to $88 million. Most recently he was the project manager on the $300 million Queens Midtown Tunnel rehabilitation project. Prior to Judlau, Mr. Sefershayan worked for 11 years at JAB Construction, where he rose from Superintendent to Vice President, working almost exclusively on bridge projects. He earned a BS and MS in Civil Engineering from Rutgers University, and is a licensed engineer in both New York and New Jersey.


Corporate Vice President

Mr. Hickey has worked on the public sector side of the engineering and construction industry for over 30 years, the last 21 of which were with MTA Bridges and Tunnels and New York City Transit. During his time with MTA Bridges and Tunnels, he served in an executive capacity leading professional engineering teams, completing numerous projects valued at up to $300 million. Most recently, he was the Deputy Chief Engineer overseeing the planning and implementation of the $800 million Capital and Major Maintenance Programs at the RFK complex, which included the Queens suspension, Harlem River lift and Bronx Truss bridges and the Henry Hudson Bridge. Prior to working in the public sector, Mr. Hickey worked in the private sector in engineering consulting, construction management and resident engineering inspection. He has extensive experience in bridge rehabilitation, rail reconstruction, water distribution, wastewater system replacement and building construction. Mr. Hickey is a licensed professional engineer in New York. He holds a BS in Environmental and a Bachelor of Engineering in Civil Engineering from Manhattan College.


Vice President of Estimating & Engineering

Mr. Vettese has over 40 years of experience in the heavy construction industry and is well known in the industry for his expertise in pre-construction and construction. He has contributed his experience and expertise for a multitude of public works projects at various capacities. Chief Estimator at Welkin, Mr. Vettese is responsible for the successful execution of the pre-construction process, forecasting construction costs as it relates to all types of construction. Frank’s duties also include developing client relationships, as well as building relationships within the contractor community. Prior to joining Welkin Mechanical, Mr. Vettese was a senior project manager and successfully completed numerous projects, including a $150 million project at a NYCDEP wastewater treatment plant. Previously, he was the Vice President of Operations for an international contractor, specializing in electrical equipment for the wastewater Industry, where he oversaw approximately $200 million in NYCDEP construction projects. Mr. Vettese is a Professional Civil Engineer in New York state and a NYC Master Plumber.


Vice President of Operations

Mr. Cappuccio has worked in New York City public works contracting for 20 years, which has afforded him an extremely broad and deep exposure to the unique needs of the mechanical, electrical and plumbing industry. He has led and directed complex projects ranging in scope from restaurants and commercial development, to wastewater treatment and rail infrastructure projects having an impact on the everyday lives of millions of New Yorkers. His involvement in this work has included all aspects of construction from inception to completion, including estimating, purchasing, contract negotiation, engineering, design and management of construction activities. A longstanding member of the United Association of Journeyman Plumbers and Pipe Fitters, Mr. Cappuccio is a master plumber in several jurisdictions, complementing his executive responsibilities with his strong technical expertise. He earned his BS in Mechanical Engineering from SUNY Maritime College, is pursuing an MS in Mechanical Engineering at Cooper Union, and is a licensed professional engineer in New York State. 


Project Executive

Mr. Khemraj has over 10 years of experience in New York City public works contracting, including experience working on some of the highest profile mechanical projects in the New York infrastructure market. He has a proven track record of seamlessly orchestrating complex installations for multiple projects from inception to completion, with budgets in excess of $50 million. His responsibilities include all phases of construction, including estimating, scheduling, procurement, engineering and management of field activities for multiple projects. Mr. Khemraj is proficient in building and managing vendor relationships for services and products, and he has earned a reputation for exceeding corporate objectives while controlling costs and improving efficiencies. In addition to construction, he manages companywide recruitment and corporate planning, leadership mentoring initiatives and heads the drafting and design department. Kevin earned his BS in Civil Engineering from NYU Polytechnic School of Engineering.

Project Executive

Mr. Brehmer has over 30 years of experience delivering successful improvements for business operations, profitability and team development. He is a resourceful manager and compliance specialist with an ability to thrive in fast-paced, dynamic environments, while sustaining operational accuracy and delivering results for optimal profitability. Mr. Brehmer most recently managed day-to-day operations for the Hudson Yards projects, as part of the trade management team for this $540 million project, which included over 1,000 owner-generated scope changes. He was also instrumental in the completion of the 13.5 megawatt Cogeneration Plant, a project that included overseeing sheet metal, piping, plumbing, sprinkler and high and low voltage work. In addition to his primary work responsibilities, Mr. Brehmer is also an instructor for local Plumber and Steamfitter unions. He attended Alfred State College, where he earned an Applied Science degree, specializing in HVAC.

Gregory Knabbe.jpg

Project Executive

Mr. Knabbe has over 10 years of experience in the New York heavy construction industry. He has led the successful completion of several high-profile contracts involving the construction and activation of portions of City Water Tunnel No. 3, Stage 2. His work in the general contracting side of the industry has provided valuable experience in the oversight and coordination of all disciplines in complex projects. His experience in all aspects of construction including estimating, procurement, scheduling, cost management, engineering, and field supervision has allowed him to deliver projects on time and on budget. With nearly $300 million of projects completed with NYC DEP, he has contributed to the fresh water supply and wastewater treatment throughout New York City. He earned is BS in Mechanical Engineering from the University of Rhode Island..



Angelita T.jpg
Gilberto R.jpg
Gabriel Y.jpg
John C.jpg
Michael M.jpg
Daria K.jpg
Keith M.jpg
Kris P.jpg
Kevin F.jpg
Kevin C.jpg
Eugene G.jpg
Glass Buildings


Welkin Mechanical is a member of the Iovino Enterprises' (IE) family of companies. IE is the parent organization to a family of companies that perform construction services for both public and commercial clients. We leverage the power of IOVATION to accelerate our company’s success by utilizing the management services provided by Iovino Enterprise Partners (IEP).  Our partnership with IEP provides vital support services in the key areas of finance, technology, human resources and legal services, as well as management best practices. This support enables Welkin Mechanical to focus on providing the best service to our clients, strengthening our relationships with our business partners and offering the most advantageous career development opportunities for our employees.
Please visit IE website for additional details about  their services at



The industry thought leaders at Welkin Mechanical remain actively engaged in various trade associations where we exchange best practices. We are proud to support the next generation of industry professionals and give back to our communities. We have provided links below to some of our affiliate websites for your convenience.

2 Mechanical Contractors Association of
Nation Fire Protection Association 2.png
American Society for Healthcare Engineer
General Contractors Association of New Y
Mechanical Contractors Association of Am


1010 Northern Blvd., Ste 204

Great Neck, NY 11021



Tel: 718.554.2800

Fax: 718.554.2839

  • White LinkedIn Icon
  • White Twitter Icon

© 2019 Welkin Mechanical.  All Rights Reserved.   Site Design by FL&O Communications