Arjun, a Managerial post is on the higher end of the pyramid. If you complete your B.Tech in CSE, you will be considered a fresher and you may join as an IT Analyst or as an Cyber Security Analyst, etc. As you put up experience, you move on to Managerial discussions. For starting a career, you need to build up skills like Strong Analytical, communication and decision making skills. You also need to develop proficiency in various programs like VMware, Windowa, Linux, Oracle, Solaris, Cisco, Active Directory, NFTS/UNIX systems. Getting certified helps you bag better opportunities.