Former Siemens contract employee David Tinley was sentenced to six months in prison for sabotaging his employer over a span of roughly two years using logic bombs planted in company spreadsheets. The end goal of his efforts was to cause Siemens to ask for his services at the firm’s Monroeville, PA location to repair the malfunctioning software. Tinley pleaded guilty to the intentional damage to a protected computer charge in July 2019 and the conviction also came with an additional two-year term of supervised release and a $7,500 fine.
Source: https://www.bleepingcomputer.com/news/security/siemens-contractor-jailed-for-sabotage-with-logic-bombs/