Manufactured in America for 70 years—we never left, and we’re here to stay.

Whelen Engineering—a global leader in the emergency warning industry—has been manufacturing in America since 1952, proudly marking its 70th anniversary in 2022.

Whelen designs and manufactures reliable and powerful warning lights, white illumination lighting, sirens, controllers, and high-powered warning systems for Automotive, Aviation (Whelen Aerospace Technologies – WAT), and Mass Notification industries worldwide.

Founded in 1952 by George W. Whelen in his garage in Deep River, Connecticut, Whelen now encompasses two state-of-the-art facilities in Connecticut and New Hampshire with over 1,000,000 square feet of manufacturing space.

As the industry leader, Whelen proudly supports American workers in the manufacturing of its products and stands behind quality American innovation and craftsmanship in every product it turns out.

With the largest design staff in the industry and 1,500 employees, Whelen’s mission is to protect those who protect and serve others by making reliable products that people can depend on when lives are on the line.

Whelen products are proudly designed, sourced, and manufactured in America, and tested on-site to meet the toughest industry certifications. With quality as the foundation, Whelen celebrates innovative engineering with every product made.

Whelen: Manufactured in America for 70 years—we never left, and we’re here to stay.

Design & Engineering

The largest staff of Design Engineers in the industry! Many of our Engineers are Fire Volunteers and EMTs so they know first hand the critical need for life saving, innovative products.

Injection & Vacuum Molding

1,600 molds, 38 molding machines – from 30- to 2,000-ton capacity, 20 million parts produced yearly. Vacuum machines produce irregularly shaped components not suitable for injection molding.

WPS2900 Speaker Mold

Electronics Manufacturing

Surface mount and through-hole circuit boards are manufactured, assembled, and tested in-circuit.

Speaker and Driver Assembly


Robotic and laser cutting and drilling, Robotic Bending Cells for stand-alone operation. All machine parts are produced and maintained by automated production machine shops in New Hampshire and Connecticut

Finished Processes

The hard-coating of lenses and powder coating of housings makes them resistant to weather and abrasion. Metalizing reflectors add reflectivity and help prevent corrosion and oxidation.

Production Machine Shop

State-of-the-art milling machines, CNC lathes, and screw machines make the precision parts required for our products.

Quality Control & Testing

Strict quality control is maintained throughout the manufacturing process. Certified on-site test labs facilitate product development and shorten lead times.

Cabinets being tested

Repair, Service & Training

Whelen’s goal is to get a product repaired and back to the customer within 24 hours. Authorized service facilities are located around the globe. Training is available not only at the Chester, CT, training facility, but also at sites around the country.

Repair Bench

Manufacturing Facilities

Chester, CT

Charlestown, NH