Thien replaces Jim Guzewich, president of Versatrans, who is retiring after 10 years of service.
Thien joined Versatrans as vice president of sales and marketing in 2007. Prior to joining Versatrans, Thien was president and chief operating officer of Fullfilnet and a practice director at Oracle.
Tyler Technologies acquired Versatrans in 2008. Company officials said the Versatrans student transportation software is used by approximately 1,700 clients nationwide.
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