Aliso Viejo-based CitizenHawk, a provider of brand and online reputation protection services, said this morning that it has named Jeffrey A. Pullen as Chairman of its Board. Pullen is the CEO of AudienceScience, a provider of audience targeting and online marketing and advertising technology. Pullen has also served at US Search, Commission Junction, ValueClick, ChemConnect, and Coopers & Lybrand.