There are many different types of grounds maintenance workers, each with their own unique skill set and responsibilities. Landscapers, groundskeepers, greenskeepers, tree trimmers, and pesticide (substances that are meant to control pests, including weeds) handlers are a few examples of specialized grounds maintenance workers. Depending on the position, grounds maintenance workers may also be expected to maintain equipment and tools needed to do the job. Experience with small engine repair can be a very useful skill in this profession. Responsibilities for grounds maintenance workers include: Fertilizing, mowing, and otherwise caring for lawns and fields. Trimming trees, hedges, shrubs, and other plants. Planting flowers, shrubs, and trees.