Traditionally, Rocket Team is divided into subteams in order to logically divide research, development, and construction among team members. These subteams usually include:
However, these subteams are subject to change depending on the mission and project that year. Subteams are lead by one (maybe two) people that are responsible for managing the subteam and delegating tasks.
Here, you can also find good information on custom technologies recently developed and/or used by the team.