Jedi Master

The title of Jedi Master was the highest formal rank obtainable by a member of the Jedi Order. Reserved for those who had shown exceptional devotion and skill as well as balance in the Force and often combat, only individuals who had been given the rank of Jedi Master could sit on the Jedi High Council.

 Jedi Masters In The Starlit Empire 

Another decade of long Jedi Knight training and completing the Jedi Trials would surpass in order to become a Jedi Master. However, with the exception of the Jedi Knight's Jedi Master, you'll be able to seek the rank of Master early. If a Jedi Master sees that a Jedi Knight is mature enough in the Force and within' balance, they'll be promoted to Jedi Master themselves.

However, if a Jedi Knight is still with their Jedi Master, even during war and their Master had died, they can reach the rank of Master in their name. However, with the current rising of the Starlit Empire, who knows how many Jedi Knight's and Jedi Master's there really are as the Jedi High Council, or the Jedi Master's themselves can only promote a Jedi Knight.