Mat Johnson

Structural Engineering for Treehouses

Design on a living foundation is unique. No two trees are the same. Different species, different growth rates, and various distances apart make each project vary greatly.


Security Properties Spring District Project

The long-awaited Spring District is taking shape!


Seattle Office Welcomes Mat!

Team Addition to SSF


Sky3 Place, Portland

Site demolition has begun for this new 15-story mixed-use project in Portland.