what to study next after MCSE - AWS, Azure, or Security +, CySA +, Firewalls (Sophos, Fortigate)
Great question... it really depends on what you are looking to focus on/specialize in. What is your MCSE in?
I have completed my 70-413 Designing and Implementing a Server Infrastructure, but AWS is opening two new data centers in S.A, so i think AWS will the best route to secure a better future?
Cloud is DEFINATELY a hot ticket right now, regardless of vendor. AWS is a good choice if they are building out in your area.
Just remember to ensure that you have a good solid set of foundational networking and security skills as well.
CompTIA Net+ and Security+
Good Luck !!!