As a hiring manager, I agree with Gaurav. I am quick to dismiss
resumes that list certificates. Taking course work to learn about new
technologies is an important way to maintain and extend your
proficiencies, but I look for a solid academic background(BS/MS in
Math/CS/Engineering) and/or good progressive experience in the field.
I am partial to people who have worked in a DevOps environment(on a
team with software engineers, systems/production/infrastructure
engineers and potentially QA/Release, if those are considered separate
roles) in the past, preferably running a large website or SaaS
A typical background for someone who does not have a formal education
typically looks like a progression from helpdesk->NOC/support
L2->Systems Admin->Systems/Infra Engineer(maybe on a dedicated
team)->Systems Engineer on a DevOps Team running interesting things.
This is not a hard and fast rule, but expect to spend some time
building your background in those areas if this the type of role you
think you want in the future.