Chrystal Mollet and Sarah Hamann

Security National Bank Announces New Vice Presidents

May 20, 2024

Chrystal Mollet has been named Vice President of Security National Bank’s Wealth Management division, previously serving as Trust Officer since 2021. She joined the division in 2015 as a Personal Trust Relationship Manager, and was promoted to Wealth Management Advisor in 2019. 

Mollet holds a Bachelor of Science in Biology from the University of South Dakota, is a graduate of the American Bankers Association Advanced Trust School, and a Certified Trust and Financial Advisor (CTFA).

In the community, Mollet currently serves as the President of the Siouxland Community Foundation. She has held various leadership roles within the Siouxland Estate Planning Council as President, Vice President, Secretary, and Membership Chair; and she continues her involvement as a general member. Additionally, Mollet actively volunteers at the Food Bank of Siouxland.

Mollet will continue to serve clients and assist them with their financial needs while leading the Wealth Management team at the Dakota Dunes branch. 

Sarah Hamann has been named Vice President of Commercial Services at Security National Bank. Hamann has 16 years of experience in the banking industry, 14 of which have been focused on building relationships with and meeting the financial needs of commercial clients in the Siouxland area.  

Holding a Bachelor of Business Administration in Accounting from the University of South Dakota, Hamann possesses a strong foundation in finance and business management. She is also a graduate of the College of Commercial Credit. 

Hamann serves on the Board of Directors and as Servicing Committee Chair for the Siouxland Economic Development Corporation, fostering economic growth in our community. She previously served on the Perry Creek PTA Executive Committee and volunteered for the United Way campaign committee. Additionally, Hamann mentors young athletes as a cheerleading coach at V.I.P. Gymnastics, Ninja, and Cheer.



Security National Bank is a full-service, community owned financial institution with branch offices serving customers in Sioux City, Dakota Dunes, Akron, Mapleton, Moville, Lawton, Orange City and Sheldon. Since its founding in 1884, Security National Bank has set the standard for integrity, honor, open-mindedness, excellent service, efficiency, good humor, respect, duty and human connection in the financial industry. Today, SNB is the largest locally owned bank in Sioux City. Security National Bank is a Member FDIC institution and an Equal Housing Lender. For more information, visit