Sounds like you have some good knowledge under your belt - I’d expand a bit more into networking. It was always a week point for me when I started and once you get a handle on subnets and VLANs and ARP and alll that fun stuff it helps troubleshooting when you work with network teams.
CCNA is a solid cert for about any IT position. You don’t need to know how to architect a network but every tech benefits from basic understanding of networks and how they work.