Rudy Giuliani, the former New York City mayor, will provide “his expertise and insight” to president-elect Donald Trump on private sector cyber-security issues, the transition team announced Thursday. “Mr. Giuliani was asked to initiate this process because of his long and very successful government career in law enforcement and his now sixteen years of work providing security solutions in the private sector,” said a post on the team’s website. In addition to sitting as chairman and CEO of Giuliani Partners, an international security consulting firm, Giuliani is also chairman of Greenberg Traurig, a “global cyber security practice,” the announcement said. Last week, BlackBerry Ltd. announced in a press release that Giuliani Partners had picked its BlackBerry Secure as “the underlying software platform to support the firm’s cybersecurity consulting services for government and enterprise customers.” It added that under the partnership, Giuliani’s company would “take advantage of BlackBerry's leadership in secure mobile communications technology to assess infrastructures, identify potential cyber security vulnerabilities, address gaps and secure endpoints with the goal of offering another channel to bring customers to a new standard of security.” In the fall, BlackBerry announced it was ending its device development to put more of a focus on security software.