drinking water and wastewater operators, sewage enforcement officers, professional engineers, backflow prevention assembly testers, onsite sewage facility professionals, water treatment specialists, licensed sanitarians, and similar roles. Learners register online or by phone, receive course workbooks and exams, complete assignments at their own pace, and return materials for grading. SkillWorks issues certificates of completion for passing scores and, in many cases, reports earned training hours directly to state licensing authorities. Courses span technical subjects such as equipment operation and maintenance, mathematics, science, compressed air systems, and special interest topics related to utility operations.