Primary Job Title Director Primary Organization 
IMRIS
Gender Male
Mr. Armstrong has been Executive Vice President and CFO of Patterson Companies, Inc., since 1999. Patterson is a publicly traded distributor of supplies, equipment and services to dental, companion-animal veterinary and therapy professionals.
Starting his career at Ernst and Young LLP in 1973, he became an audit assurance partner in his 26-year
tenure at the firm, primarily serving publicly-traded national and multinational clients. He is also a board member of Delphax Technologies, Inc. and is chair of its Audit Committee.
Mr. Armstrong’s background includes extensive experience with Securities and Exchange Commission registration and reporting requirements, inventory accounting techniques, acquisition due diligence and reporting, corporate income tax, and stock compensation programs.
He has served on the Board of Trustees of St. John’s University in Collegeville, MN, for the past seven years where he chairs the Finance Committee and sits on the Executive Committee.
He is also a member of the Board of Directors of the Patterson Foundation.
