Business Details
49 Years
experience
Emergency
services
Trusted Mechanical Contractors in Riverdale, NJ
Founded in 1977 by William Post Sr., WJ Post, Inc. represents the next generation of Peter Post and Son, Inc., a mechanical contracting firm established in 1945. Our company has consistently adapted to industry changes driven by technology, regulations, and environmental standards, positioning ourselves as industry leaders. We collaborate with reputable facilities managers, general contractors, engineers, and architects to deliver high-quality mechanical, HVAC, and plumbing services tailored to demanding industries like pharmaceuticals, chemicals, and food production. Our union-trained workforce includes UA-certified welders, medical gas specialists, and backflow prevention experts, ensuring precision and reliability. With decades of experience managing large-scale projects for clients such as Novartis and RWJ Barnabas Health System, we prioritize safety, efficiency, and client satisfaction.Our commitment to excellence is reflected in our long-standing partnerships, including over 45 years of service at Novartis East Hanover campus. We maintain rigorous safety standards, evidenced by multiple Governors Safety Awards, and invest in advanced problem-solving, CAD technology, and skilled labor to meet project demands. Our teams expertise spans emergency maintenance, complex system shutdowns, and new construction, supported by strong vendor relationships and a focus on timely, budget-conscious delivery. We pride ourselves on transparency, accountability, and fostering collaborative relationships with clients and trades alike.
Services
Mechanical Contracting
HVAC Services
Plumbing Services
Emergency Maintenance
Duct Cleaning
Details
- Year established: 1977
Highlights and features
- We offer 45+ years of experience in mechanical contracting for regulated industries.
- Our team includes UA-certified welders and specialists in medical gas systems.
- We maintain rigorous safety standards with multiple Governors Safety Awards.
- We serve pharmaceutical, chemical, and food industries with tailored solutions.
- Our 24/7 emergency services ensure rapid response for critical systems.
What people say
Timely, on-budget projects
Skilled, certified professionals
Exceptional emergency response
Long-term partnerships
Safety excellence
Services
Mechanical Contracting
We design and install complex mechanical systems for pharmaceutical, chemical, and food processing facilities. Our services include piping, UA-certified welding, and system integration. Projects range from new construction to critical system upgrades, ensuring compliance with industry regulations and safety standards.
HVAC Services
Our HVAC solutions cover commercial and industrial applications, including chiller replacements and ventilation systems. We specialize in maintaining temperature-sensitive environments for pharmaceutical and healthcare clients. Services include installation, maintenance, and emergency repairs with minimal downtime.
Plumbing Services
We provide code-compliant plumbing installations and repairs for commercial and industrial facilities. Our team handles backflow prevention, medical gas systems, and high-purity piping. All work meets strict regulatory requirements for safety and performance in critical environments.
Emergency Maintenance
Our 24/7 emergency response team addresses urgent mechanical failures in HVAC, plumbing, and industrial systems. We prioritize rapid resolution to minimize operational disruptions, with technicians available for after-hours and weekend service across New Jersey.
Duct Cleaning
We perform thorough duct cleaning to improve indoor air quality and system efficiency. This service includes HVAC ductwork inspection, debris removal, and sanitization. Regular maintenance reduces energy costs and extends equipment lifespan for commercial clients.
People
Robert Post
President & Owner
Robert Post leads WJ Post with over 30 years of experience in mechanical contracting. A certified welder and HVACR-licensed professional, he holds a Bachelors degree in Business Management. He oversees operations and client relationships.
Al Bocchino
Operations Manager
Al Bocchino manages large-scale projects with 42 years of union plumbing experience. He has overseen Novartis East Hanover facility for 15+ years, specializing in project management, estimating, and crew coordination.
Mike Ramundo
Chief Estimator
Mike Ramundo directs bidding and project management with 22 years in the industry. His expertise includes mechanical equipment procurement and client account management, supported by a background in architectural design and construction oversight.
Questions
What industries do you specialize in?
We focus on pharmaceutical, chemical, food processing, healthcare, and commercial sectors requiring specialized mechanical systems and compliance expertise.
Do you offer emergency services?
Yes, our 24/7 emergency team responds to HVAC, plumbing, and mechanical system failures across New Jersey with rapid resolution.
Are your technicians certified?
Our team includes UA-certified welders, medical gas specialists, and backflow prevention experts with rigorous union training and safety certifications.
How do you ensure project safety?
We maintain strict safety protocols aligned with OSHA standards and have received multiple Governor’s Safety Awards for our safety record.
Can you handle large-scale projects?
Yes, we manage complex builds, system shutdowns, and renovations with union labor resources and CAD-driven planning for timely delivery.
