as well as agreement
The verb after a subject joined by as well as.
As well as adds a companion. It does not make a singular subject plural. The verb agrees with the first subject: The report, as well as the notes, is ready. Use and when both items are equal subjects: The report and the notes are ready.
Examples
UseThe director, as well as the staff, is attending.
UseThe director and the staff are attending.
AvoidThe director, as well as the staff, are attending.