BUILDINGS: Knowledge of and ability to install, repair, and maintain exterior and interior structures, systems, facilities, and related fixtures and utilities; the operation, maintenance, and repair of boilers/furnaces, heating/air conditioning systems and controls, air compressors, and pressure vessels; power generation systems and physical plants; sprinkler, alarm, and security systems; computer systems, networks, and related devices; computer building control systems (Direct Digital Control); maintenance of plumbing subsystems and equipment; and the performance of skilled work in cleaning, finishing, and painting of interior and exterior surfaces, including methods, techniques, devices, and materials that are best suited to the surface finish required. Knowledge of and the ability to mix and properly use solvents, gas, fertilizers, fungicides, herbicides, and pesticides; grow, transplant, prune and maintain a variety of plants; propagate and tend nursery stock common to greenhouse operations; apply techniques of efficient/effective landscape designs, plant species, growing zones and season, soil requirements, and growth habits; design and install irrigation and water management systems for landscaped areas; detect and identify needed treatment of plant disease/pests; take soil sample and determine proper pH and other nutrients necessary for growing and maintaining a variety of plants; and plan and design garden beds and planting schedules.