A longtime Fond du Lac city employee is stepping down. Wastewater treatment plant operations manager John Leonhard is retiring after 30 years of service to the city. "Its been a great place to work, have had real good communication witth all the staff over the years, its been my pleasure to work with five different city managers, four different public works directors and I'm leaving on a high note," Leonhard said. "Its been a happy career." Leonhard was recognized at last week’s city council meeting.