Founded in 2011

Alternate Resistance Specialists (ARS) was founded with the intent of learning the firestop industry and to apply our many years of construction experience towards the development of a company that specializes in correct firestop installations on all types of construction projects. During our many years of being in the construction industry, we realized that there was a need for more qualified firestop installation companies whose sole purpose and business platform revolves around the correct identification of firestop needs and the proper installation of the many firestop systems available to the construction industry.

The two founders have a combined construction experience of over 50 years ranging from general contracting to subcontracting specialties in administration, accounting, design, project management, estimating and field supervision.

We have taken this vast experience in all facets of the construction industry to form a company that strives to learn and understand the various types of firestopping applications and the important roles that firestopping plays in the construction of safe buildings including but not limited to those for commercial, residential, institutional and hospitality occupants.

Fully Certified

Fully licensed and operating in Colorado, Utah, Louisiana, Wyoming.

Our Work

The ARS Team

Alternate Resistance Specialists is composed of a dedicated team of professional office and field personnel who possess a wide range of backgrounds. Our extensive experience and expertise have led us to build what has become the premier firestopping company in Colorado.


Stephen Kohara

Stephen Kohara

Co-Founder & CEO

Amy Rose

Amy Rose

Co-Founder & CFO

Alex Rothberg

Alex Rothberg

Project Manager

Brianna Collins

Brianna Collins

Project Administrator

Lisa Fox-Bowers

Lisa Fox-Bowers

Assistant Controller

Joshua Tuckett

Joshua Tuckett

Director of Field Operations

Aaron Hapke

Aaron Hapke

Quality Control Director

Remy Callahan

Remy Callahan

Safety Manager

Victor Soto

Superintendent

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