515 S Minnesota Avenue
Sioux Falls, SD 57104
Phone: 605-361-1010
Fax: 605-361-5109
3310 W 49th St
Sioux Falls, SD 57106
Phone: 605-334-2400
Fax: 605-334-3427
549 Broadway
Centerville, SD 57014
Phone: 605-563-2207
Fax: 605-563-2437

About Us

David W. King is the CEO of ONE AMERICAN BANK. He negotiated the purchase of and joined ONE AMERICAN BANK in 2011. Mr. King has been in the financial/banking industry for 29 years. Prior to that, he spent 12 years in the grain/commodity brokerage field. He has also operated a grain farm his entire adult life. He was born on the homestead farm near Toronto, SD.
Bob Laird joined ONE AMERICAN BANK in 2011. Mr. Laird is the President and Chief Credit Officer of ONE AMERICAN BANK and has been in the financial/banking industry for 33 years. Bob graduated from South Dakota State University receiving a degree in Commercial Economics and shortly after attended the University Of Texas Graduate School of Banking. Bob has been married to his wife for 33 years and they have three sons.
Per Ostrem has been in the financial/banking field since 2008. Prior to that, he spent 8 years as a CPA. As CFO, he oversees the operating functions of ONE AMERICAN BANK including accounting, operations, compliance, IT and HR. He graduated from the University of South Dakota with a bachelor’s degree in Accounting and an MBA. Per and his wife have four children and spends his free time attending sporting events and other activities with his family.


ONE AMERICAN BANK is a family owned bank. Opened as the Bank of Centerville in 1883, 6 years before South Dakota had gained statehood; it has weathered the test of time. The Thomson family members were the principal shareholders and executive officers for over 100 years, later changing the Bank’s name to First Midwest Bank. In 2011, the Thomson family sold the Bank to Mert Lund, who had owned community banks over the last 40 years. With innovative ideas, the Bank was renamed ONE AMERICAN BANK with two locations in Sioux Falls and one in Centerville. Sadly, in January of 2013, Mert passed away leaving his banking legacy to his wife Karen and son George. The Lunds have reaffirmed their commitment to maintain and grow the Bank per Mert’s wishes. The Bank has a solid management team in place and a commitment to maintain customer service excellence. As an extremely well capitalized financial institution, the Bank is embracing technology with new products and services. As much as these technological advancements will enhance and simplify the way you conduct your financial business, it’s the staff members at ONE AMERICAN BANK that will be there to listen to you, to assist you, and help answer any questions that technology simply can’t resolve. We’d love to be your trusted financial partners as well. Give us a call or stop in any of our convenient offices.