Skill in monitoring and evaluating the work of subordinate staff; prioritizing and assigning work; handling hazardous materials; entering confined spaces; monitoring and maintaining optimal inventory levels; performing manual labor; operating applicable tools, equipment, a utilized in the trade; reading and interpreting maps and/or other technical documents; monitoring and adhering to safe work practices; cleaning and maintaining storm/sewer lines; troubleshooting sewer systems; tree care operations; and, communication and interpersonal skills as applied to interaction with coworkers, supervisor, the general public, etc. KNOWLEDGE AND SKILLS: Knowledge of supervisory principles; street, building, parks, grounds and landscape maintenance and/or construction; basic masonry installation, construction, repair, and maintenance techniques; mechanical principles; plumbing principles; applicable tools, equipment, and vehicles utilized in the trade; customer service principles; inventory management principles and.