The nation's largest voting equipment vendor has for at least nine years coaxed state and local elections officials to serve on an advisory board" that gathers twice annually for company-sponsored conferences, including one last year at a ritzy Las Vegas resort hotel. The arrangement could compromise the integrity of the officials' decisions. As many as a dozen election officials attended the March 2, 2017 Las Vegas meeting, with a number of them accepting airfare, lodging, meals and, according to one participant, a ticket to a show on the Strip from their voting systems vendor, Nebraska-based Election Systems and Software (ES&S). The unusual practice, which has not previously been reported, offers a glimpse of one way in which a voting equipment manufacturer has sought to cement relationships with government officials, some of whom play roles in the award of millions of dollars in contracts. Ethics experts and election watchdogs say the company's hospitality and hobnobbing with government officials is potentially corrupting. Many states are continuing a shift to voting systems that produce paper backup ballots, so vote counts can be verified in post-election audits. ES&S is peddling electronic ballot-marking devices that produce paper ballots to be fed into optical scanners - equipment that critics contend should be limited to use by disabled voters. Paper ballots, they say, are far less expensive and can be scanned and quickly tabulated.