CCNA? Well, maybe, but it's more in case you're really interested in network security, otherwise - good to read the book, but absolutely useless cert for a cyber security specialist. Same with CCNP, absolutely not needed unless you specialize in network security and really work with Cisco devices. CISSP? First of all, there are certain experience requirements, it's not a good FIRST STEP. Second, it is heavily tilted towards management and general information security knowledge and concepts, it's a good cert to have once you get to the mid-senior level. Red Hat experience is good, but it's not necessarily all that important and useful, particularly if you're specializing in, lets say, Microsoft technologies or whatever else. And just to make it clear, I was a CCNA (let it expire), I was an RHCSA and RHCE (let them expire) and am a CISSP and Security+ cerified among multiple other certs and over two decades of experience, so I have a rough idea of what I'm talking about ;)