Installs racks, exhaust hoods and blowers in laboratories; Installs shelving, storage cabinets and new hardware; Services and repairs overhead doors (replaces Torsion springs, stretch springs, cables, pulleys, tracks, panels and related parts); Performs minor plastering repairs and masonry repairs including glass block replacements; Performs minor painting jobs and refinishes furniture; Performs simple repairs to furnaces, air ducts and operating maintenance machinery; Installs, replaces and repairs various types of locks; May be required to drive to and from work sites; May be required to maintain mobile warehouse with related equipment to maintain warehouse; May be required to operate electronic equipment to enter work orders, purchase orders and supplies; Performs related duties as required. Open Competitive (A) Graduation from a vocational/technical high school in one of the skilled building trades: carpentry, caulking, electrical, glazier, masonry, mechanical, plumbing and one year of full-time experience in one of the skilled building trades: carpentry, caulking, electrical, glazier, masonry, mechanical, painting, plastering, plumbing (proof of education must be presented at time of filing application); or, (B) Three years of full-time experience in one of the skilled building trades (carpentry, caulking, electrical, glazier, masonry, mechanical, painting, plastering, plumbing); or, (C) Four years of full-time experience as a helper to one of the skilled building trades (carpentry, caulking, electrical, glazier, masonry, mechanical, painting, plastering, plumbing).