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Established in 1985, OBAR SYSTEMS is one of the first radon mitigation companies in the country. OBAR has installed over 20,000 radon mitigation systems in NJ, NY, CT, and PA. We are a full service company that provides testing, design and mitigation services for both radon and vapor intrusion mitigation. OBAR also provides a full line of mitigation products and radon supplies to contractors and homeowners. We strive to maintain our reputation as honest, hard working professionals who can be trusted to get the job done.


Vapor Intrusion Mitigation
Mitigation System Design
Building Diagnostics
LSRP Partnering

Wholesale Supplies
Randon Mitigation
Randon Testing
Randon in Water Mitigation


At OBAR we pride ourselves on  maintaining the confidentiality of our clients. Through direct contracts with multiple Fortune 100 companies and as sub-contractors to some of the nation’s largest environmental engineering firms OBAR has provided mitigation solution for over 5 million squire feet of commercial space.  Our mitigation experience includes dry cleaners, manufacturing facilities. industrial parks, furnished office space, and whole community mitigations.


Mitigation system designed and installed by OBAR System are guaranteed to meet predefined sub slab pressure differential requirements. We warranty our system for workmanship and performance for the first year of operation.


OSHA 40 HAZWOPER certified technicians   AVETTA certified  ISNetworld certified 5,000,000 liability insurance   NYC licensed contractors

NJDEP randon mitigation specialists



Gunnar Barr

President Obar Systems Inc.
  • 33 Years radon mitigation and vapor intrusion mitigation experience.
  • Technical advisor NJDEP vapor intrusion mitigation guidance.
  • Assistant Instructor Rutgers University ERRTC Radon Mitigation Proficiency course.
  • Technical advisor NJDEP/NJDCA Radon Hazard Sub-Code
  • NJDEP License MIS10056 MET 10056

Alex Barr

Vice President
Radon Mitigation Specialist

Dan Nuzzetti

Project Engineer
Vapor Intrusion Mitigation Specialist

Matt Troeller

Wholesale and E-Commerce Manager
Bill Brodhead

Bill Brodhead

Radon and Vapor Intrusion Mitigation Specialist

Craig Centrelli

Site Foreman

Sean Mulcahy

Site Foreman

Taylor Neveling

Project Engineer