About DURRIDGE

DURRIDGE is a leading provider of professional radon detection equipment. Since 1997, DURRIDGE has offered world-class radon detection solutions for businesses, universities, and governments worldwide. Our RAD7 continuous radon gas monitor features precise measurement far exceeding EPA accuracy standards. DURRIDGE also provides a wide range of accessories for the RAD7, as well as CAPTURE software for performing sophisticated radon data analysis, and expert calibration and maintenance services.

The RAD7 electronic radon detector was invented by Professor Lee Grodzins when he was head of the radon program at the Massachusetts Institute of Technology. DURRIDGE was formed in 1997 to take over production and support of the RAD7. Since then the RAD7 has continued in uninterrupted production and development, becoming an industry standard for research and professional applications. Today thousands of RAD7s are in regular use worldwide.

Leadership Team
  • Carlos Bielicki
  • Carlos Bielicki

    Chief Commercial Officer

    Carlos is responsible for developing DURRIDGE’s strategic vision and leads the company’s sales, marketing, and engineering teams. He has a diverse background in high tech executive management ranging from start-ups to established companies including Broadcom, IBM, and Nuance. Carlos holds B.S. and M.Eng. degrees in electrical engineering from Cornell.

  • Jesse Simko
  • Ronda Wang

    Senior Vice President, Operations

    Ronda is responsible for a wide variety of operations, including Administration, Accounts, Finance, HR/Personnel, Production, and Customer Support. She also participates in Durridge’s strategic planning and policy formulation. She holds Master’s Degrees in CS and Information Systems.

  • Stephen Sadler
  • Stephen Sadler, Ph.D.

    Chief Scientific Officer
    Managing Director, Durridge UK

    Dr. Stephen Sadler manages the Durridge UK office, where he is responsible for research and operations. He also provides support for customers within the European Union. Dr. Sadler earned his Ph.D. in experimental astroparticle physics at the University of Sheffield.

  • Adam Shrey
  • Adam Shrey

    Vice President, Engineering

    Adam is a hands-on manager who leads the engineering team in the development of world-class professional radon detectors, analytics software, and accessory products for soil and water measurements. He has a B.S. in computer engineering from Virginia Tech.

  • Jesse Simko
  • Jesse Simko

    Digital Information Architect

    Following a chance encounter with the company’s founder, Jesse became responsible for the design of DURRIDGE’s desktop software applications, including CAPTURE and the RAD7 Calibration Tool. He also handles web and print design projects, drawing from his experience as an artist and game developer.

  • Kathy Fletcher

    Vice President, Production

    Kathy leads DURRIDGE’s Production team, which is responsible for product assembly, calibration, packaging, and servicing, as well as customer support.

Founder Emeritus
  • Derek Lane-Smith
  • Dr. Derek Lane-Smith

    Dr. Derek Lane-Smith founded DURRIDGE in 1997 as a spin-out of the radon detector business from Niton Corporation, and remained as Chief Executive Officer and Chief Technology Officer of DURRIDGE until 2016. He was instrumental in the technical refinement and marketing of the RAD7 professional radon detector that has become an industry standard for academic and government research, professional radon monitoring, and various other applications. Dr. Lane-Smith has a background in atmospheric physics.

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 National Radon Safety Board