Security executive Rinki Sethi joined Twitter as the company's vice president and chief information security officer this week, Nick Tornow, platform leader at Twitter, announced in a Tweet Monday. CISO Mike Convertino, departed in December.
Reporting to Tornow, Sethi will lead the platform's information security, including enterprise and security risk, application security, and detection and response. She will also work with Twitter's privacy and data protection team and provide security updates to employees and the board of directors.
Most recently, Sethi served as the VP and CISO of cloud data management company Rubrik, Inc., where she protected internal assets and advised on security product innovation. She also held VP of information security roles at IBM and Palo Alto Networks.
At Twitter's security helm, Sethi is responsible for a threat landscape that includes the company's 5,200 employees, each of which can pose a security risk, joining the company as it recovers from a spear phishing attack this summer.
In July, a social engineering campaign targeted a "small number of employees" and allowed attackers access to Twitter's internal network and support tools, the company said in a blog post detailing the attack.
Attackers leveraged internal support tools to access account support tools, compromising 130 Twitter accounts, including direct messages and Twitter data, according to the announcement.
In a textbook campaign, attackers were able to leverage stolen credentials to escalate platform access, ultimately accessing high-profile accounts, including accounts from Bill Gates and Elon Musk. Following the incident, Twitter limited internal tool access, which the company said would cause account support and developer platform application delays.
Phishing has become more advanced and attackers are getting more creative, an upgrade from the malicious links baiting users to click. Menlo Security detailed an example of attackers layering credential phishing under visual captchas to target Microsoft Office 365 credentials.
Trust becomes a key concern from the breach. In addition to impacting audience trust, a breach and compromised accounts negatively impacts Twitter's reputation and could result in advertising taking a hit, the company said in its Q2 earnings.
"Security doesn't have an end point," Twitter CEO Jack Dorsey said in the July earnings call. "It's a constant iteration to stay steps ahead of adversaries. We fell behind, both in our protections against social engineering of our employees and restrictions on our internal tools."