Olsen Thielen & Co., Ltd. Share: Accountants/CPA's Olsen Thielen & Co., Ltd. Visit Website Request Info 2675 Long Lake Road St. Paul, MN 55113-1117 (651) 483-4521 (651) 483-2467 (fax) LinkedIn Facebook Twitter About Map About CPA & business consulting firm serving western Wisconsin companies since 1921. What's Nearby? Distance: 5 10 15 20 25 50 mi.