Security National Bank Announces New Dakota Dunes Branch Manager

January 15, 2026

Diana Bormann has been named Branch Manager at the Bank’s Dakota Dunes location. In her role, she will supervise retail staff at the branch location, while working closely with new and existing customers to meet their financial needs.

Janelle Noreen will continue to provide oversight and support while working between the downtown and Dakota Dunes branches.

Bormann brings 14 years of management experience to SNB and is well known for her strong leadership skills, dedication to mentoring, and commitment to helping employees grow and succeed in their careers. In addition to managing the branch, she is an active member of the community and lives in Dakota Dunes with her husband and two children.

She graduated from the University of La Verne in California with a bachelor of arts degree in communications with an emphasis in broadcast journalism.

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ABOUT SECURITY NATIONAL BANK

Security National Bank is a full-service 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 banking industry. Today, SNB is the largest locally owned bank in Sioux City. Security National Bank is Member FDIC and Equal Housing Lender. For more information, visit SNBonline.com.