Brent Rasmussen was a senior executive at CareerBuilder and private-equity investor. : CORRECTEDA former senior CareerBuilder executive has been hired as the new CEO of Opternative, a Chicago-based startup that came up with technology for online vision tests.Brent Rasmussen, who previously was president of CareerBuilder's North American business and a private-equity investor, takes over a company with 35 employees that was founded in 2012. Opternative provides technology for online vision tests to companies such as 1800contacts and Lens.com for prescription renewals. Opternative's tests are legal in 42 states, but some do not allow online vision exams.