Municipal employees who are elected rather than appointed to their salaried positions have their work cut out for them at reelection time, when they may have to fend off challengers interested in taking over their jobs and their substantial paychecks.

“I’m a nervous wreck every three years,” said Debra Kenney, Lakeville’s treasurer-collector for the last 13 years, who is up for reelection to her $69,000-per-year job on April 1. The time for challenges has just passed, and Kenney was ­relieved to find that she will be unopposed, at least this run. She will get to keep her job.