Santa Clara, California-based Palo Alto Networks has appointed Steffan Tomlinson as its newest CFO. Prior to joining Palo Alto Networks, Tomlinson served as CFO of Arista Networks, following a stint as partner and chief administration officer of Silver Lake Kraftwerk at Silver Lake Partners and Silver Lake Kraftwerk Fund. From 2005 to 2011, Tomlinson served as CFO of Aruba Networks, and was instrumental in its IPO and helping the company scale to facilitate growth. From 2000 to 2005, he was the first nonfounder employee and, ultimately, CFO of Peribit Networks, which was later acquired by Juniper Networks for $337m. Michael Lehman, Palo Alto Networks CFO since April 2010, will assist during the transition.