Deputy Headmaster/Headmistress

Hogwarts also has a Deputy Headmaster /Deputy Headmistress  (depending on gender) that assists the headmaster in his duties. In the event of a headmaster's incapacitation, the deputy headmaster serves as temporary headmaster until the Board of Governors can elect a new, permanent one. There can also be more than one deputy headmaster, as the Carrow siblings served under Severus Snape.

Known Hogwarts Deputy Headmasters and Deputy Headmistress's

Albus Dumbledore (1945 - 1956 before appoinment to Headmaster) Albus Dumbledore was a Students Head Boy, Prefect, Transfiguration Professor, Head of Gryffindor House, Deputy Headmaster and Head of Transfiguration department and then was Appointed to Headmaster in 1956 after Armando Dippet left the post, Albus was then Headmaster for 41 Years at Hogwarts School and then died 41 Years later by 6th Year Defence Against the Dark Arts Professor, Former Potions Master and Head of Slytheirn House Severus Snape.
 * Minerva McGonagall (after 1956-1 September, 1997)82px-Albus_Dumbledore_(HBP_promo)_1.jpg
 * Alecto Carrow (1 September, 1997-2 May, 1998)
 * 99px-Death_Eater-Amycus_Carrow-02.jpg107px-Alecthog.jpgs Carrow (1 September, 1997-2 May, 1998)
 * Minerva McGonagall was a Students ,Head Girl, Prefect, Transfiguration Professor, Head of Gryffindor House, Deputy Headmistress and concurrently Headmistress and was part of the Battle of Hogwarts in 1997-1998 and contiued to Teach Transfiguration and Head of Gryffindor House during Severus Snape's tenure as Headmaster and after Snape abandons his post, and flees Hogwarts School of Witchcraft and Wizardry, she was then appointed to Headmistress of Hogwarts School of Witchcraft and Wizardry until 2017
 * Amycus Carrow was a Death Eater and a follower of Lord Voldemort. When Lord Voldemort took over the Ministry of Magic, he then appointed Severus Snape to Headmaster of Hogwarts. Minerva McGonagall was to take over for Albus Dumbledore after he died, but Snape was appointed to Headmaster by Lord Voldemort. Severus Snape appointed Amycus to Deputy Headmaster and Defence Against the Dark Arts Professor for the 1997-1998 school year and was also appointed to be in charge of Discipline at Hogwarts
 * Alecto Carrow was also a Death Eater and a Follower of Lord Voldemort. When Lord Voldemort took over the Ministry of Magic, he then got Minister Pius Thicknesse to appoint Severus Snape to Headmaster of Hogwarts School of Witchcraft and Wizardry and appoint Alecto Carrow to Muggle Studies Professor, Deputy Headmistress and in charge of Discipline at Hogwarts 98px-Mcgonagall_headshot.png
 * Alecto Carrow was also a Death Eater and a Follower of Lord Voldemort. When Lord Voldemort took over the Ministry of Magic, he then got Minister Pius Thicknesse to appoint Severus Snape to Headmaster of Hogwarts School of Witchcraft and Wizardry and appoint Alecto Carrow to Muggle Studies Professor, Deputy Headmistress and in charge of Discipline at Hogwarts 98px-Mcgonagall_headshot.png
 * Alecto Carrow was also a Death Eater and a Follower of Lord Voldemort. When Lord Voldemort took over the Ministry of Magic, he then got Minister Pius Thicknesse to appoint Severus Snape to Headmaster of Hogwarts School of Witchcraft and Wizardry and appoint Alecto Carrow to Muggle Studies Professor, Deputy Headmistress and in charge of Discipline at Hogwarts 98px-Mcgonagall_headshot.png