Here, I'll post the formulas:
offset_date = cell where you enter the number of future years, could be zero, could be 5, etc.
offset is "=(TODAY()+(offset_date*365))"
service is "(offset-D8)/365" where D8 is the relative cell for date of hire
too_old is "=IF((offset-E8)/365<=60,0,-999)" where E8 is the relative cell for the date of birth
service sort is service + too_old
Sort on "service sort"
Unfortunately, it does not take leap years into account. I'll have to work on that...
