Come up with a staffing plan for your new IT department. Consider managers as well as admin and help desk workers. You are supporting 100 employee’s companywide so we CANNOT ADD 25 or more employees to the payroll.
Keep in mind that some people will have to do multiple jobs and the people tasked with building out your web site will be responsible for supporting it.
How would you organize 100 workers to operate DATA CENER a new IT department, appreciate that it's allowed to have one worker for melt able position?