The system includes four golf courses, three family centers, a zoo, a farm park, botanical gardens, several sports and athletic complexes, two indoor aquatics centers, six outdoor swimming pools, multiple School-Park sites and more than 100 miles of recreational trails -- including 70 miles of Greenways. Must possess a valid motor vehicle operators License; Must obtain and maintain a valid Commercial Drivers License (CDL) with appropriate class and endorsements within probationary period for all assignments except the Dickerson Park Zoo; ATSSA Supervisory Work Zone Certification within the first 12 months for Public Works assignments.