Tammi Gagnon

Security National Bank Names New Trust Officer

January 31, 2018

SIOUX CITY, Iowa — D. Douglas Rice, Chairman, President and CEO of Security National Bank, is pleased to announce the following promotion:

Tammi L. Gagnon has been named a Trust Officer in the Wealth Management Division at Security National Bank, where she will work closely with both individual clients and community foundations to develop financial strategies based on their unique needs.

A professional with broad expertise and legal experience in the areas of trust and estate planning, Gagnon is an alumna of Morningside College and holds a Juris Doctorate (J.D.) from the University of South Dakota’s School of Law. She is a member of the Iowa, Nebraska and South Dakota Bar Associations; and serves on both the Siouxland Estate Planning and Trust and Estate Councils.

Gagnon has been a member of the Wealth Management Division at SNB for the past 18 years. She began as a Trust Administrator, and became a Wealth Management Advisor upon receiving her Certified Trust Financial Advisor (CTFA) designation. Active in the community, Gagnon is also a long-term board member of the Siouxland Humane Society.


Security National Bank is a local, full-service financial institution with branch offices serving customers in Sioux City, Akron, Mapleton, Moville, Lawton and Climbing Hill. Since its founding in 1884, Security National Bank has set the standard for integrity, reliability, innovation and continued commitment to providing customers with superior service. Today, SNB is the largest locally owned bank in Sioux City. 

Visit the employment opportunities webpage to learn more about ways to advance your career with Security National Bank.