Sierra Trading Post is headquartered in Cheyenne, employs more than 700 people, and mails tens of millions of catalogs a year in More than 200 telephone representatives at call centers located in Cheyenne and Cody handle up to 150,000 calls monthly – 90 percent of these calls are answered in 30 seconds.Sierra Trading Post’s shipping department moves 5,500 to 7,500 orders daily. The majority of orders are shipped within 24 hours.