Juniper Networks this week said it named former Walmart information security executive Kevin Walker as its new security CTO, replacing Christofer Hoff, who left last June.

Walker will report to Jonathan Davidson, executive vice president and general manager of Juniper Development and Innovation. He will help lead the security strategy within Juniper and guide the company’s security product roadmap.

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“For Juniper, ‘security’ and ‘networking’ are one and the same and we are committed to building the most secure networks for our customers. Kevin brings years of cybersecurity expertise across product development, research and engineering as well as front-line experience at some of the world’s largest companies. He understands the complex issues that our customers face and will help Juniper continue to innovate, challenge the status quo and deliver security solutions that meet our customers’ needs,” Davidson said in a statement.

Walker has more than 25 years in information security and technology, most recently as vice president and assistant chief information security officer at Walmart.com. He was also chief information security officer, chief security strategist and director of information security at Intuit, Cisco Systems, Symantec and Veritas Software.

Hoff left Juniper in June to become senior vice president of cybersecurity technology at Bank of America/Merrill Lynch. He spent four years at Juniper, ultimately deciding to “fight fires” instead of building “fire extinguishers.”