Trusted Experts in HVAC & Refrigeration

For over 23 years, Guaranteed Mechanical has proudly served restaurants and businesses across New Jersey. We provide 24/7 service, handling installation, maintenance, and repairs for walk-in refrigerators, freezers, rooftop HVAC units, and commercial kitchen appliances. When it comes to HVAC and refrigeration, we do it all!

Delivering Excellence Across Industries

Group with checkmark icon on green background.

Expanding Our Reach

In the last two years, we’ve worked hard to extend our services to the public sector and construction industry in New Jersey and New York—bringing our expertise to an even wider range of clients.

Document icon with security checkmark symbol.

Certified & Qualified

We are SBE, MBE, and DBE-certified with the Port Authority of NY & NJ and hold DPMC-27 certification with the State of New Jersey for HVAC and refrigeration (HVACR).

Hand holding a checkmark badge icon.

Committed to Excellence

Our mission is to enhance the customer experience by offering convenience, cost-effective solutions, and top-quality service.

Meet Our Team

Man in Guaranteed Mechanical uniform sitting down.

Calixto Guerra Sr

President & Sr. Project Manager

Calixto Guerra Sr began his humble entrepreneurial journey as a sole proprietor of Climate Control Systems back in February 1992 serving commercial refrigeration and HVAC equipment. He had an old van and a small room of his home was the office space at the time. During the company's early years, he acted as the salesperson, technician, and office manager. His vision allowed the company to be a stable business from the outset. In May 2003, Guaranteed Mechanical was born as a family business. He then shared the helm with his son and daughter and became president of the company. In 2014, Guaranteed General Maintenance re-branded and became Guaranteed Mechanical.

Calixto Sr. remains actively involved in all of the company's daily activities and service team management. Calixto Sr. holds a Bachelor's Degree in Electromechanical Engineering from The Autonomous University of Santo Domingo, Dominican Republic, and has over 40 years of experience in the industry.

Read More
Man standing outdoors on a sunny day.

Calixto Guerra Jr

Vice President, Field Project Manager

Calixto Guerra Jr. also known as Manny began working with his father when he was 12 years old. In the Summer of 1993, he bought his first bike with his summer job earnings, and at this very early age, Manny was able to successfully change his first compressor with his father's guidance.

In 2003, He joined the family business venture when his father founded Guaranteed Mechanical He worked side by side with Calixto Sr as the service technician and field service manager. Under Manny’s leadership, Guaranteed Mechanical has adopted new strategies that are helping the growth of our customer base and scaling our business operations. Manny holds a degree in HVAC and Refrigeration from Union County Technical & Vocational School in New Jersey and has over 15 years of experience in the field.

Read More

Thank You for Trusting Us

We appreciate the opportunity to serve your business and look forward to continuing to support your success. Let’s keep your operations running smoothly—together!

Schedule an Appointment