Workstudy is intended to provide students the opportunity to pair up with employees at Hogwarts School for work experience and practise in the career of their interest. Though these occupations are obviously limited, they do provide an excellent bullet point on one's resume and give students the chance to build references for future employment outside of Hogwarts.
caretaking Apollyon Pringle
Caretaking involves enforcement of castle rules and administration of discipline, which, in this day and age, is particularly aggressive. The caretaker is also required to keep files on those disciplined and confiscate any dangerous or banned items found in the school.
duties: occasional castle rounds with caretaker; sitting in on discipline sessions; filing students: Walden Macnair, Ann Marchbanks, Bilius Weasley
gamekeeping Professor Kettleburn
The responsibility of the gamekeeper is to look after all animals at Hogwarts, including thestrals, the giant squid, and those animals kept for Care of Magical Creatures. The gamekeeper is also expected to liaise with the centaurs of the Forbidden Forest if and when it is necessary.
duties: help feeding, bathing, and otherwise caring for the creatures on Hogwarts' grounds students: Desmond Diggory, Wilhelmina Grubbly-Plank, Bilius Weasley notes: students must be taking Care of Magical Creatures, OWL or NEWT level.
healing Hippocrates & Amalthea Smethwyk
Healers are stationed in the hospital wing and are charged with the physical well-being of students. Injuries and illnesses of any sort are treated by the healer and his nurse, usually (but not always) with no questions asked.
duties: rounds with Healer and Nurse Smethwyk, paperwork, occasional midnight emergency calls students: Rupert Brookstanton, Jameson Kirke, Frances Li, Regulus Moonshine, Poppy Pomfrey, Eileen Prince, Elizabeth Prince, Miriam Strout notes: students must be taking healing, OWL or NEWT level
librarianing Barnabus Blenkinsop
The librarian's purpose is the upkeep of the library and helping students locate and borrow books. The librarian is also responsible for keeping students without permission out of the restricted section, which contains dangerous books.
duties: shelving, indexing, helping students locate books students: Antonin Dolohov, Rodolphus Lestrange, Wilhelm Wigworthy
teaching Headmaster Dippet
Headmaster Dippet is dedicated to encouraging the next generation of Hogwarts professors! Unfortunately, he doesn't really have time to help per se, so he tends to 'oversee' the workstudy and assign students to helping professors at random... with or without their respective permission.
duties: assignment to a professor; grading 1st - 3rd years' papers; aiding in classes students: Polly Applebee, Hector Dagworth-Granger, Kennan Kirke, Minerva McGonagall, Evander Nott, Pomona Sprout