If you appeal, your appeal must be submitted in writing on the official appeal form, signed by you or your representative, and received at the following address within ten (10) days of your receipt of this notice: Colorado State Personnel Board/State Personnel Director, Attn: Appeals Processing, 1525 Sherman Street, 4th Floor, Denver, CO 80203. performing preventative maintenance on heating and air conditioning systems and assists a journeyman in the repairs, maintenance, and installation of heating, air conditioning, refrigeration, ventilation, fire protection, building equipment, utility, and other related systems on Buckley Space Force Base.