Chances are you will get the big heave ho, on yer bike jack!!
If it's a local authority owned ground the councils response is likley to be "we don't control moles" however "we sub contract the work out" who later down the line, you find out the sub contracting firm don't do moles neither!!!
I do lots of work on local authority owned property but it's only the associations. Local club or parks comitees etc that use these grounds who actually pay me.
I hope you get a better response.