I took certification (ended up taking 5 in fact) and found them very valuable. Specifically, working through the entire Base SAS Certification Prep Guide (which took about a month) was, in retrospect, the best thing I could have done at the start of my career. Followed up by the advanced base course, which gives you essential knowledge on macro, SQL and programming efficiencies. The first book gives you a solid understanding of the fundamentals (data step, pdv, input statements etc) which as a 'pick it up as you go' type learner you will likely never come across or have time for. And taking the exam gives you a reason to study / goal to aim for. As a recruiter, if I see that a candidate has taken certification, I think "this person cares about SAS and is motivated to further their career". This is just as important as the actual SAS knowledge itself!
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