The term "Officer" as we think of it wasn't used in Germany until end of the 16th century. The had equivalents though.
In Emperor Maxmillian's day more often than not an army was led by an Oberst, which is a Colonel. On rare occasions a higher rank of General would be used, especially in the case of an army made up of many regiments. This would be led by a Generalobrist. This was also the case in an army that contains Artillery and Cavalry as well as infantry, one person in charge of the entire army.
There was the second in command of a regiment the Locumtenens, the Provost who was in charge of discipline in the regiment, the Schultheiss who was in charge of the application of the law set forth in the regiments articles of war drawn up when the regiment was formed,
the Oberst Feldweibel in charge of the order of battle, and the Hurenweibel or "whore's Sergeant" who was in charge of the trains. Also the Nachrichter or executioner, the stockmeister and his assistannts the steckenknecht who guarded prisoners, the pfenningmeister who was in charge of pay, and the wachtmeister who was in charge of guarding and defending the camp and train. The feldartz or doctor and his assistants. These men were all picked by the Oberst.
In charge of each Fahlien(company), 10 of which made up a regiment was a Captain. The Fahlien was between 300-500 men and a mix of handgunners, pikemen and dopplesoldners. The captain had a Lieutenat or second in command and the Ensign also considered an officer of the Fahlien. Just as the Oberst the Captain would also have a staff and bodyguards. Unlike the Oberst the Captain would fight on foot armed with poleaxe, halberd or two handed sword. The Ensign of each Fahlien was chosen by the Oberst and was second in importance only to the Captain. Interestingly the Ensign was not always, nor obligated to be in the front ranks of the Fahlien.
Each Fahlien had a Feldweibel or Sergeant Major, the lowest of the ranks chosen by the Oberst.He was in charge of mauvering the unit, setting up the order of battle, and drilling the men. At the end of the front rank of each Fahlien were two Gemenweibel or comon Sergeants. These men were elected to the position each month from out of the company. They helped dress the lines and interact on behalf of the men
The company was made up of ranks(geld) and files (rott). We know what a rank is from the game, a file is simply this: Each man in the front rank of your formation is also the first man in a file made up of all the men standing in the line right behind him. For example in a simple 4x5 formation of 20 men. You have 5 ranks of four men each and you also have 4 files of 5 men each. The front rank and sometimes ranks were made up of Dopplesoldner or double soldiers, veterans who earned twice the pay of a regular trooper thus the name. The dopplesoldner in the front rank was called the Rottmeister. They also filled into the rear ranks only interspersed in order to keep the formation together.
Hopefully this wasn't too awfully dry to read and I hope it helps too.