Culture

Conscientious, empowered, respectful, and transformative. For over 50 years, we’ve built our culture around these values.

How We Got Here

Our company is rooted in a long history of ecological responsibility and technical excellence. We embrace complex, innovative designs and foster a culture that equips our team with the tools and support they need to excel. Through mentorship, continuing education, and the use of cutting-edge technologies, we empower our people to grow and succeed. We are committed to promoting from within and creating an environment where every employee feels valued, trusted, and integral to our collective success. In 2025, we deepened this commitment by transitioning Interface Engineering to an Employee Stock Ownership Plan (ESOP), giving our employees a direct stake in the company’s growth and future.

McGinnis Engineering

Established in 1969 in Gladstone, Oregon, Dan Pickett and Larry McGinnis form McGinnis Engineering. Offering Mechanical Engineering services, the firm was comprised of only 4 employees.

McGinnis Becomes Mc-AN Engineering

Under the new name Mc-AN Engineering, the growing firm relocates to Milwaukie, Oregon.

Mc-An Becomes Interface Engineering

42 employees strong and with the recent addition of electrical engineering services, Mc-An purchases Langton-Mehlig and forms Interface Engineering.

Specialty Services

Interface expands its services to include lighting design, fire/life safety, building technologies, and commissioning.

Interface Headquarters Relocates to Downtown Portland

After several years in Milwaukie, Interface moves its headquarters to downtown Portland.

San Francisco

Interface San Francisco opens its doors on April 1.

Seattle

Seattle opens a local office in October of 2007.

Sustainable Milestone

Interface completes our 100th LEED Certified project.

East and West Expansion

Interface opens offices in Washington, DC and Honolulu, Hawaii, extending our services and providing new opportunities for our clients.

Net-Zero Energy Certification

Hood River Middle School's Music & Science Building and Sacred Heart Lower and Middle Schools' Stevens Library both achieve Net-Zero Energy Certification.

Chicago + Los Angeles

Interface expands our presence on the West Coast and in the Midwest, providing clients with even better access to our innovative team members and shared technical expertise.

50 Years of Innovation

Interface celebrates 50 years in business. What began in 1969 as small office in Gladstone, Oregon is now a national practice of 275+ professionals in seven offices across the country.

Interface Engineering Becomes 100% Employee-Owned

After over 55 years of significant expansion and growth, Interface Engineering, Inc. opens its next chapter.

50 Years of Innovation

As we mark a half century in business, it’s a moment to celebrate: to look back and to look ahead. 50 Years of Innovation tells the story of our humble beginnings to who we are today, from a small mechanical engineering firm in Gladstone, Oregon to one of the largest independent MEP practices in the country.