No. Having dbcreator only gives permissions to ALTER ANY DATABASE (meaning create/delete, too). This gives no permissions to create/alter SSIS packages stored in SQL Server or to schedule them for execution. The SQLAgent* roles manage job permissions. The db_ssis* roles manage SSIS packages stored in msdb. Both of the latter set of roles is found in the msdb database.
K. Brian Kelley
@kbriankelley