Server Administrator for Multiple Sites

I am in need of a proficient server administrator. While the operating system used for the server is undisclosed, the ideal candidate will have experience across a variety of platforms including Windows, Linux, and macOS. Your main tasks include (but are not limited to) server maintenance, security updates, and performance optimization. In particular, you will be managing a large number of websites or applications - in fact, there are 11 or more hosted on the server. This is a demanding role that requires strong technical skills, excellent time management and a proactive mindset.