Since 1934, we've been committed to providing exceptional HVAC services to Long Island. At T.F. O'Brien Cooling & Heating, we are proud to have a team of highly-skilled, knowledgable and detail-oriented professionals. Our team members aren't just experts in heating and cooling; they're the friendly faces who enter your homes and businesses, ensuring your comfort all year long. All our technicians are highly trained and NATE-certified. Exceptional customer service and HVAC industry expertise has earned various awards and certifications including the Carrier President's Award and an A+ rating from the Better Business Bureau. Get to know the individuals who make T.F. O'Brien a trusted name in HVAC on Long Island.
Office
Kerry O'Brien
President
Kerry O’Brien is the President of T.F. O’Brien Heating & Air Conditioning, one of Long Island’s most respected and enduring HVAC companies. A third-generation business owner, Kerry has spent his career refining the customer experience, building a reputation rooted in trust, professionalism, and consistency.
At T.F. O’Brien, Kerry leads a team committed to delivering high-touch service and long-term customer relationships, not just transactions. His approach to building trust through every step of the customer journey, from initial contact to post-installation follow-up, has earned the company a fiercely loyal base and strong word-of-mouth growth.
Kerry is a vocal advocate for the role of authentic communication, team training, and visible social proof in modern HVAC sales. He brings a practical, real-world perspective to brand building, grounded in decades of hands-on experience in the field.
Valkyrie Krayer
Learning and Development Manager
“We’re going into and working on equipment in people’s most valuable asset – their home. That’s a big responsibility and we want to be the best versions of ourselves in every way.”
Lisa O'Brien
Office/Accounting Manager
Lisa’s finance career started on Wall Street. After 15 years and 3 children, she took some time to be home with family. When the need arose in 2008 for an A/R person at TF O’Brien, she stepped in to help out and has been there ever since. She is proud of the growth that’s happened in her years at the company, excited for the future and feels fortunate to be part of the great TF O’Brien team.
Andres David
Recruiter/HR Manager
“We’re in the people business, and we’re focused on doing things other HVAC companies don’t, like building a great culture. If employees are happy, they do a better job for our customers.”
Sonali Javeri
Accounts Payable Representative
Sonali has been with the team since 2022. She always keeps things fun by supplying the morning huddles with team bonding games.
Patrick O'Brien
Sales Manager
“We want to we want to make sure that the customer can trust us, that they feel comfortable with us, that we are being honest in our approach… we stand behind our work, we stand behind our solutions, and we want to make sure that customers can feel comfortable knowing that we're going to get the job done right, and that they're going to be happy with the end product.”
Brendan Sihler
System Designer
Professional and Pleasant
Brendan came to my house to give me a quote. He is very professional and pleasant. Though I had several quotes at the mid range, I'm leaning towards using T.F. O'brien which has excellent reviews and they guarantee their work for a full 2 years!
Google Reviewer, Joe P. on speaking with Brendan
Thomas O'Brien
Part Owner, System Designer
Thomas has been in the HVAC business for over 30 years. He deals primarily with commercial clients. He enjoys spending time in Florida, and is also a huge New York Rangers Fan.
Chris O'Brien
Part Owner, System Designer
Punctual, courteous
"Chris stopped by right on time a soon after I called for a free estimate. Communication about the appointment was clear and efficient. He was punctual, courteous and I felt very comfortable with his assessment of our HVAC needs. The quote was fair and they were also able to arrange financing."
- Karin B.
Chris Oak
Sales
“People trust T.F. O'Brien because of how we will always listen to you and we will always be there for you. We'll keep you comfortable and we stand behind our work. And customers like to hear that.”
Took The Time To Understand My Needs
"I had the pleasure of meeting with Chris today for an estimate, What I appreciated most was Chris insightful advice. They didn't just focus on selling me a product; instead, they took the time to understand my needs and provided recommendations tailored to them. Their expertise was evident, and I left feeling confident that I was making the right decision for my home.
Overall, my experience was exceptional, and I would highly recommend their services to anyone in need of heating solutions. Thank you."
Google Reviewer, Rone L. on speaking with Chris
Installers
Andre Jaramillo
Install Manager
Andre J is the Install manager has been with the company for since 2012 and has grown within the company starting as a parts runner all the way to the install manager now.
Anthony Costantino
Lead Installer
Anthony has been with the team since 2021.
Polite and Professional
"Anthony came to install our furnace. He was polite and professional. Let me know exactly what they were doing and explained everything before and also when they were done. They cleaned up everything and were great to deal with."
- Shannon S., Google Reviewer
Jose Castillo Martinez
Install Field Supervisor
Jose has been with T.F. O'Brien since 2020. He Oversees and plans hands on training in order to continue to grow the knowledge of our installers on latest best practices. Building up the knowledge and experience of our installers is his passion.
Nawaz Shah
Installer
Shah has been with T.F. O'Brien since 2018. He always brings the laughs and smiles to the team. Shah longevity to TFO brings great impact to our install team. He is able to assist in helping teach the ways to newer crew members and always has them laughing as he does it.
Service Technicians
Richie Hogan
Service Manager
"Richie has been with T.F. O'Brien since 2014. Richie has been dedicated and motivated to the success of our team. Richie dedicates a lot of his success to his mindset of being adaptable and the ability to “Embrace Change”. The field we are in is constantly changing, you must be able to be flexible, and open to new ideas and approaches to promote success as a team."
Ronald Tamborello
Lead Service Technician
Ronald has been with T.F. O'Brien since 2014. According to his team members, "Ronald is very thorough and will do what ever he can to make sure to inform you on as must information as possible. He takes the time to make sure a customer understands what he is explaining to them. He will go above and beyond to leave things better than he found it."
Ronald T. Was Terrific
"Ronald T. Was terrific. He explained everything he was going to do,went over the cost, and was very personable. He even won over my grandpuppy! We will definitely be using this service again. Clean and neat, which is more than I can say for me sometimes!"
Google Reviewer, Jane T. shares her experience with Ronald
Nick Betka
Lead Service Installer
Nick has been with T.F. O'Brien since 2018. According to his team members, "He has a passion for always doing the right thing for the customer. The customer needs our expertise to fix the issue and he will do everything he can to ensure a job well done."
Professional and Informative
"Nick Betka was professional and informative. He explained everything I needed to know about my burner and water tank. I really appreciate his service. Thank you Nick."
Google Reviewer, Carol S., on working with Nick
Eli Carter
Eli has been with T.F. O'Brien since 2015. According to his team members, "He is great at articulating a problem so a customer can understand it. He's known for being very approachable and easy to talk to. He is also an excellent teacher to his teammates and to customers so that information is well understood."
Courteous, Professional, and Detail-Oriented
"I had an excellent experience with Eli from TF O'Brien! He was incredibly courteous, professional, and detail-oriented. Eli took the time to explain what my system was doing, discussed potential solutions, and offered great tips for keeping it running smoothly. A big thank you to Eli and the team at TF O'Brien."
Google Reviewer, Ari T., praises Eli for the wonderful experience
Masud Bari
Masud has been with T.F. O'Brien for 3 years. According to his team members, "He has a very advanced knowledge and is great at explaining why something is needed and why its is not. He goes to the next level in representing the customer. He is a prime advocate for the company culture, and will always go out of his way to stop and answer questions for customers that stop him on the street when they see his truck. He makes time for all of the customers needs big or small and always educates them."
Polite, Knowledgable
"Masud Bari was the person who solved our problem yesterday. He found the leak in our system!!!!! He was very thorough, polite, knowledgeable. Thank you!"
Google Reviewer, Judy D., praises Masud for the wonderful experience
Nick Clark
“It was a great decision to come work here. In fact, I moved an hour away but I still work for T.F. O’Brien because it’s the best experience I’ve had in HVAC. They insist on honesty and integrity.”
Courteous, On-time, Professional
"As usual the service from TF O’Brien was outstanding. Nick C was courteous, on-time, professional and he explained everything to me upon completion of the installation of the air scrubber."
Google Reviewer, Matthew C.'s experience working with Nick
Omesh Persaud
Quickly Identified the Problem & Fixed It
"I am happy to join the long list of happy customers of T.F. O'Brien and to add my personal recommendation and gratitude to Omesh Persaud, a senior technician who came out, on time, providing advance notice, and demonstrated expertise and knowledge of our system, quickly identified the problem and fixed it. "
Google Reviewer, Joseph M., praises Omesh for the wonderful experience
Oscar Osbaldo Vasquez Flores
Polite, Knowledgable
"Oscar was very thorough and detailed in explaining the problem and available options. I was very happy with my experience."
Google Reviewer, Jen, praises Oscar for the wonderful experience
David Barriga
David has been with the team since 2022. David takes pride in educating our customers on the benefits of indoor air quality and how it can make a big difference to our homes.