ranger (n.)

• arboriculturist
• attendant
• caretaker
• conservationist
• conservator
• curator
• custodian
• deliverer
• forester
• gamekeeper
• governor
• guardian
• janitor
• keeper
• lifeguard
• lifesaver
• logger
• lumberjack
• lumberman
• marines
• paratroops
• preservationist
• preserver
• rescuer
• saver
• savior
• shepherd
• steward
• taxidermist
• timberman
• warden
• warder
• woodcutter
• woodman
• woodsman