Donlen Corp. offers fleet leasing, accident management, administrative services, fuel management, remarketing, transportation services, upfitting services, vehicle acquisition, and vehicle maintenance.
Donlen was founded in 1965. Hertz Global Holdings acquired Donlen in 2011. Tom Callahan was named president of Donlen on Jan. 1, 2013, succeeding Gary Rappeport.
On its website, Donlen claims to be the "the fastest growing fleet management company" and said it has experienced consistent growth since 2004.