Inside RSA Engineering

Trusted Alaska-based engineers delivering energy-efficient mechanical and electrical systems with precision and real-world solutions for cold climate design, sustainability, and long-term performance.

Cold Climate Design Backed by Proven Expertise

Since 1986, RSA Engineering has delivered expert mechanical and electrical design solutions for projects across Alaska and beyond. Specializing in cold climate systems, we bring deep local knowledge, technical excellence, and practical experience to every job. Our engineers are known for designing efficient, reliable systems that perform in the most demanding conditions while reducing energy use and operational costs. From public infrastructure to educational facilities, remote healthcare clinics to urban redevelopment, RSA is a trusted partner for high-quality engineering that’s on time, on budget, and built to last. With a team of certified professionals and a collaborative, can-do culture, we are committed to building smarter systems and stronger communities.

Why Choose RSA?

Innovative
Designs

Creative, efficient solutions tailored to complex challenges in Alaska’s unique built environments.

Expert
Team

Dependable engineering with collaborative innovation at every stage.

Sustainable Practices

Energy-efficient systems that reduce environmental impact and support long-term cost savings.

Cold Climate Experts

Decades of experience designing systems that perform in extreme Arctic and subarctic conditions.

Building Sustainable Systems for Alaska’s Future

At RSA, we design sustainable mechanical and electrical systems that reduce energy use, and lower costs, built to perform in Alaska’s harshest environments. Reach out today to learn more.

A Legacy of Innovation

1983 Richard S. Armstrong Founded RSA

Richard S. (Dick) Armstrong founded RSA Engineering in 1983. Building on his 10 years of Alaska engineering experience, Dick set out on his own and soon earned the trust and respect of the North Slope Borough.

1986 RSA Incorporated

Dick’s company designed power plants, wastewater treatment plants, and virtually every conceivable type of facility for numerous remote villages throughout the borough. In just three years, Dick grew his sole proprietorship into an 11-person firm and incorporated in the fall of 1986.

2000 Dave Oliver, P.E. Elected President

In the year 2000, Dave A. Oliver, P.E., took over the reins and became President and Principal Electrical Engineer.

2008 Mack W. Bergstedt, P.E. Elected President

In early 2008, Dave passed those reins over to Mack W. Bergstedt, P.E., President and Principal Mechanical Engineer and Timothy E. Hall, P.E., Vice President and Principal Electrical Engineer.

2014 RSA Engineering relocates

In 2014, after years of sustained growth, RSA finally outgrew their offices and relocated to a new, modern facility that has state of the art conference rooms and tons of collaboration space.

2014 Timothy E. Hall, P.E. Elected President

Later in 2014, Mack W. Bergstedt retired and Timothy E. Hall was elected President. Mark R. Frischkorn, P.E., Vice President of Mechanical Engineering and Roger L. Weese, P.E., RCDD, Vice President and Principal Electrical Engineer, provide support for Tim.

2019 Roger L. Weese, P.E. Elected President

In January of 2019, the company’s Board of Directors elected Roger as the new President of RSA. RSA’s Board of Directors also elected Channing as Vice President. Adam Wilson continues to lead the Mechanical Department as Vice President.

2026 Channing Lillo, P.E. Elected President

In January of 2026, the company’s Board of Directors elected Channing as the new President of RSA. RSA’s Board of Directors also elected Jeremy Maxie as Vice President. Adam Wilson, Vice President, leads RSA’s Mechanical Engineering Department, and Mark Frischkorn continues as Vice President where he focuses on business development.

Engineering Solutions

Built With Experience

Crafting with innovation, precision, and unparalleled attention to detail.