If you are going with 2-3 yrs experience then i guess being fluent is Solaris OS is good enough and few here and there commands for veritas volume manager. And yes ..shell scripting is must if you get hired in Engineering side..also veritas cluster/container/ZFS ..these are advanced level courses and need rigorous training/experience to troubleshoot these...I have  full time admin in my workplace who doesnt know Veritas cluster even with genuine exp of 7 yrs..so its something like you learn it over the period of years...you cant be guru in 2-3 yrs...you just have to have mentality of learning every day...GOODLUCK!!!