Milwaukee Area



Madison & NE WI Area



Meet Our Team

David Daniels

David is the owner of Radon Specialists of WI. He started the business in July of 2000. Married to Lucy with five children, 4 of which are still at home. David sits on the AARST board of directors and has taught classes on how to start and run a Radon business at national symposiums. Served in the Air Force from 1987 to 1991, holds two degrees in Financial Management and Applied Technology. Loves to travel, eat good food, watch movies, play games, sports and lift weight in our gym at the Fox Valley location.

Pat Lewis

Pat is a Lieutenant in the Appleton Fire Department. Pat’s wife’s name is Christy and they have four children. Pat has been working for us part-time since October of 2001. He was also in the Air Force as a pilot.

Pat has a very outgoing personality and cares about his work. He is trained in how to install systems and certified by NEHA to conduct Radon tests. He is also my neighbor so I rely on him quite a bit when I am too busy for testing and estimates.




Nick Marks

Nick’s background in construction is helping him to fit right in with the rest of our team. He started working for us in May 2009 and is now managing our Fox Valley office.

Nick grew up building fireplaces in his father’s business. He graduated in 2005, and is engaged to Courtney. He owns his own home in Appleton.

Nick enjoys the simpler pleasures of life: long walks on the beach, donating to charities he cares about, and he loves kids and animals.




Ryan Mancheski

Ryan was hired in the spring of 2013.  Ryan now lives in Hartford and manages our Milwaukee office in Menomonee Falls office and is cetified. Single, loves sports – Packers. He is great with customer relations. 





Ben Daniels

Ben is 20 and a certified installer at our Fox Valley location. Single, lives at home with me and Lucy yet. Loves working on computers, gaming and reading.






Brandon Wittmann

Brandon is our new manager for the Madison office in Sun Prairie. He is certified and takes great pride in his work. Single and looking.


Jason Lloyd

New installer for our Fox Valley office. He is on his own already and working towards certification. Jason has a daughter and son and lives in Neenah.


Joe Beil

Joe is our new installer in training at our Menomonee Falls office. He is single and working towards his certification. Loves to fish.


Chris Ward

Chris is our Master electrician. He resides in Appleton, married with three children. We look forward to building our electrical business with him.


Courtney Billington

Courtney is our office manager for the Fox Valley location. She is engaged to Nick our manager to be married in September. Proficient in organization and scheduling work. Likes to shop, travel, spend time with family and friends.