Omaha, Nebraska-based Security National Bank, which operates in Dallas, has realigned executive leadership roles to ensure the bank remains family-owned and positioned for future growth. James “Jim” E. Landen retains his role as executive chairman, while Clarence “C.L.” L. Landen III has been named chief executive officer. Tim Sullivan joins the bank as president.

“Security National Bank is dedicated to remaining privately held and family-owned and is making plans to continue to serve our communities well into the future,” Jim Landen says. “Tim’s leadership and experience will help accelerate the bank’s evolution as well as work to further develop our next generation of leaders.”

Sullivan has nearly 35 years of banking experience with an emphasis on commercial lending. He holds a bachelor’s degree in finance from Nebraska Wesleyan University and an MBA degree from Creighton University. He is also an advisory board member of the Creighton University Heider College of Business.

“We want to continue to be a high-performing, relationship-focused bank for our employees, customers and communities,” Sullivan says. “One of our strengths is the culture that the Landens have created, and I want to build upon that for generations to come.”

The Landens are both sons of the bank’s founder, Clarence L. “Mickey” Landen Jr. Jim and C.L. joined the bank’s executive leadership team nearly 30 years ago. Members of the family’s third generation have joined the organization in the past five years.

Established in 1964, Security National Bank has 12 full-service locations in Omaha, Nebraska; Council Bluffs and West Des Moines, Iowa; and Dallas.