Interior Architecture



Leadership Team

A dynamic team of collaborators


With a team of experienced and talented professionals, our leadership team strives to build strong working relationships and open communication among our project teams and individual clients. At all levels of support, design and management, our firm members are committed to providing quality professional services within each project's determined budget, design and time parameters.



Troy Tooz, PE

LJA President & WAI Board Member


Troy  is the President of Lightowler Johnson Associates, Inc. (LJA), WAI Continuum's parent company.  Troy is a professional civil engineer.


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Scott Koester, LEED AP

Vice President, Board Member


As Vice President, Scott leads many areas of the firm including administration, business development and project management.  In the last role, he works as project lead and helps organize the project team while assisting clients in addressing project components such as marketing studies, zoning and regulatory approvals, financing and control issues.  As a firm leader, he manages and monitors cost and quality control, both in-house and project driven, and spearheads our process management and procedures.


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Michael Paulson

Administrative Director, Associate


As Director of Business Administration, Michael has worked as a business professional for over 20 years. His unique and multifaceted background includes accounting management, IT/ IS administration and human resources management, as well as project support and administrative management duties. Michael also works collaboratively with other project managers and leaders in developing project proformas, budgets and accounting systems.


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David Wolterstorff, AIA

Founder, Board Member


David is the President and principal founder of WAI Continuum with over 42 years experience as a registered architect. He began his career specializing in healthcare design and has since expanded his experience to include educational, civic, religious and, most notably, senior housing and healthcare. With heavy emphasis on forward thinking solutions, David has distinguished himself both as a design innovator and successful project administrator.


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Steven Dewald, PE

Board Member


Steven is the Chief Executive Officer of Lightowler Johnson Associates, Inc. (LJA), WAI Continuum's parent company.  Steven is a professional civil engineer.


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WAI Continuum   381 East Kellogg Blvd, St. Paul, MN 55101  651.227.0644   |   LJA   700 Main Street, Fargo, ND 58103  701.293.1350