The management team leading Radius Engineering International Inc. into the fast paced and growing world of the shelter protection industry is comprised of highly skilled, experienced professionals dedicated and totally focused on establishing and maintaining leadership in the industry. But it takes more than a dedicated and experienced management team. It takes the skill, commitment and teamwork of every member of the Radius team, from the Board of Directors to our office administrator, fiberglass technicians and financial team. They are, in the final analysis, the people who power our drive for lasting customer satisfaction, sustained financial performance and increasing shareholder value.

Walton W. McCarthy - PRESIDENT AND PRINCIPLE ENGINEERING

Walton McCarthy is the president and Principle Engineer of Radius Engineering Inc. He is a mechanical engineer with a B.S. from Montana State University. He is a member of the American Society of Mechanical Engineers. The American Society of Testing and Materials, the Composite Fabricators Association, and serves on a technical Advisory Board of The American Civil Defense Association (TACDA).

McCarthy's research started in 1978 when he was privately funded for educational research which formed the basis of his first book, THE NUCLEAR SHELTERIST. He thereafter wrote PRINCIPLES OF PROTECTION, The US Handbook of NBC Weapon Fundamentals and Shelter Engineering Design Standards, known in the industry as P.O.P. This book, now in its fifth edition for 2002, has become the engineering bible for shelter engineering in the US.

McCarthy has designed and built over 550 shelters using steel, concrete, wood, and fiberglass, Some of his contributions to the engineering and civil defense filed include developing a new rating system for underground shelters to determine radiation doses inside a shelter known as the Total Rems in Shelter system or TRS; developing the Overpressure Choking Theory to negate the use of blast valves; developing fiberglass structures composed of multiple compound curves designed to resist multiple external pressures; and developing various underground shelter emergency escape methods.

Radius Engineering Inc. (bomb-shelter.net) has become the national leader in underground shelter technology.

McCarthy is a private pilot which enables him to travel on his or the customer's schedule. When commercial airlines suffer from strikes, mechanical problems, scheduling problems, etc. McCarthy will find a way to make his appointment with his customer or outside contractors.

McCarthy has used his HAM Radio experience to properly equip shelters and train shelterists to use a HAM Radio enabling communication with other people without being dependant on the conventional telephone system which has proven to be undependable during disasters such as Hurricane Hogo, 911, Hurricane Katrina, and Rita. Using the shelter radio package, shelterists can call for help, get medical advice, and report tactical information to First Responders, Red Cross, FEMA, Search and Rescue, contractors, etc.

Sr. VP of Operations

Heather McCarthy is the Sr. VP of Operations for Radius Engineering International Inc.  McCarthy joined Radius in 2007 as the Director of Operations bringing more than thirteen years extensive experience in marketing, sales, operations, change management, database development, operational and tactical expertise, training, and executive administration.  As the Sr. VP of Operations, McCarthy provides financial services and support to all company operations which includes accounting, treasury, tax, financial reporting, and analysis.  She is also responsible for the marketing and manufacturing operations where she develops and implements process controls and procedures.  As a manufacturer of ITAR products, she holds the title of Executive Director of Export Controls for the company and is certified in ITAR exports.  Mrs. McCarthy is married to Walton McCarthy and has one child.  In her spare time she enjoys reading, writing, scuba diving, spending time with her family.

Preston J. Thomas-Stahle- Senior Designer

LTC USA Retired Reserve

Preston earned a BS Degree in Industrial Design from San Jose State College while working as a draftsman & model maker for Hambleton Building Design and Hydro Research Science. He reported for Active duty at Aberdeen Proving Grounds, Maryland for the Ordnance Officer Basic Course then went to Redstone Arsenal, Alabama for the Ammunition Officer course before going to Germany. In Germany he served as Ammunition Supply Officer, Special Weapons Storage Officer, CBR Officer, and Courier Officer. Prior to deploying to Vietnam he attended the Maintenance Staff Officer Course and Vietnamese language course for advisors. He was awarded the Bronze Star for Service for organizing scrap processing in the Long Binh PDO. He served as an Aviation Supply Officer before changing his branch to Civil Affairs and being assigned as Graphics Officer for a PSYOP Battalion.

Preston serves Radius as the senior designer and is competent in various CAD systems such as Inventor, Autocad, and Kubotek. Preston has extremely strong mechanical skills and a long history of military and commercial experience contributing to his design expertise and 3D Modeling skills. Preston is able to easily understand underground structures that are designed for buckling loads and intersecting of compound curves which is necessary for all of Radius's products. He is responsible for all mechanical drawings, custom designs, special technical presentations and production methods.

Darik McCarhy - Logistic Manager

After college and serving as a Marine, Darik McCarthy, son of Walton McCarthy joined the Radius team full time and manages the purchasing department. He is always looking for better materials and parts to improve Radius products. Darik has been involved with underground shelters since he was a child. He also serves as the international liaison.