Which of the following is grammatically correct

Although reluctant, technicians sometimes must demonstrate their computer software skills.

Although, reluctant technicians sometimes must demonstrate their computer software skills.

Although reluctant technicians sometimes must demonstrate their computer software skills.

Which of the following is grammatically correct

All of the auditors is authorized to proceed with an independent action however only the CEO can alter the councils directives.

All of the auditors are authorized to proceed with an independent action, however only the CEO can alter the councils directives.

All of the auditors are authorized to proceed with an independent action; however, only the CEO can alter the council's directives.