It's the process, not quantity of IT Staff (Score 1)

Look to your headcount: 150 employees / 1 IT Support. That is really nothing. My last headcount was 450/1. You CEO to give you 1 more IT Support would have to cut a Programmer. What you need is good processes to help you on your daily task. Ask for an ITIL course, for you *and* your IT Manager, commit to using it's best practices (your CEO will have to back this up) and it will make things better. You can stack a lot of IT Personnel, sure, or you can do more, using good practices.