Yahoo hires new CISO, now the third exec in role in 6 months

Bob Lord replaces Ramses Martinez as CISO, who himself left shortly after replacing Alex Stamos in July.

Yahoo on Monday said it has appointed Bob Lord as chief information security officer (CISO) to lead enterprise network security for Yahoo customers and employees.

Lord is the third executive to hold the Yahoo CISO title in less than six months, following a concerning amount of executive churn at the search company.

In June, Alex Stamos left his gig as Yahoo CISO to become the CSO of social networking giant Facebook. Shortly after Stamos' departure, the CISO role was filled by Ramses Martinez -- only to have Martinez quietly abandon the position in August to join Apple's information security team.

Assuming Lord sticks with Yahoo, he will lead Yahoo's security team dubbed the Paranoids and the group's various security initiatives. These include creating and managing Yahoo's global incident response and bug bounty programs, as well as its suite of encrypted products. The CISO is also tasked with working with law enforcement during security incidents and investigations.

Most recently, Lord served as CISO-in-Residence for the cybersecurity firm Rapid 7. Prior to that, he led information security efforts for Twitter and held positions in product and information security at Red Hat, AOL, and Netscape.

Yahoo's executive exodus also includes the recent departure of Jacqueline Reses, who served as Yahoo's chief development officer. Last week Reses moved on to Square to lead the company's small business lending program Square Capital.

Before that, Yahoo CMO Kathy Savitt left Yahoo to join TX Entertainment in Hollywood.

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