Beth Cobert’s arrival at the Office of Management and Budget is getting a particularly warm welcome from Steve VanRoekel, the federal chief information officer. In a Twitter message this afternoon, VanRoekel hailed Cobert ‘s confirmation as OMB’s deputy director for management, noting that he can now go back to being “full-time US CIO!” Cobert, who comes from consulting firm McKinsey & Co., was sworn in today, five days after winning Senate confirmation. She replaces Jeff Zients, who stepped down at the end of April; on top of his day job, VanRoekel had been filling in as deputy management director since…