You can get your Windows people to grant the Service Start/Stop right for the SQL Agent service to the DBA Windows group. You can then use any of the standard Windows methods to start and stop the SQL Agent service.
Original author: SQL Server FineBuild 1-click install and best practice configuration of SQL Server 2017 2016, 2014, 2012, 2008 R2, 2008 and 2005. 1 Dec 2016
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Quote: "When I give food to the poor they call me a saint. When I ask why they are poor they call me a communist." - Archbishop Hélder Câmara