Database add-on

Hi. I have an existing online database for the runners who participant in my relay races. Teams are made up of 6 or 12 runners. My current database handles all of their information. The addition I need to the database is this - each team is responsible for providing one to three volunteers. I have around 36 locations where these volunteers are positioned. I have added a feature where where the captain of the team logs in and then can choses where their volunteers will be positioned. I have some additional projects to expand the capabilities of the database - exporting reports, etc. Thank you.