The First Crusade invited separate army contingents from both northern and southern parts of France, along with divisions from Germany and Norman-Italy. Suffice it to say, given the ‘French’ origin of many of these earlier crusaders, the Kingdom of Jerusalem adopted the political customs and offices of the Kingdom of France. Among them, the senechal was possibly the highest rank holder within the offices of the state. And though many of his duties were ceremonial in nature, the senechal was responsible for doling out (high-level) justice, inspecting castles, organizing garrisons and most importantly arranging the supply chains for strategic military networks.
Interestingly enough, in spite of these ‘core’ responsibilities, the senechal was just one member of the king’s royal bataille (division). On the other hand, it was the connetable who actually commanded the army under the king’s name, while also representing the monarch in the High Court (when the king was absent). His second-in-command was the marechal, who was responsible for paying the mercenaries, organizing the fighting divisions and playing his supervisory role in regards to the discipline and equipment of the army.