Which would be more beneficial for the SFC selection board: working on masters or attempt to complete a certification or two?

I would suggest trying to accomplish both the masters and certifications. One day you will retire and the masters will open many doors for employment that you cannot access with just a bachelors. Most masters programs go into depth of complex problem solving, including unique techniques and approaches that certifications or a bachelors degree will not provide. Completion of a masters program will make you more marketable in both the military and civilian occupations.

I can't honestly answer from a CSM's viewpoint on what they look for but I think it mostly depends on what the Masters or certifications are in. Overall, I would go with the Masters but I would also work on some certifications.

Take a moment to review Network Technology Academy in the "Education Opportunities" section of the Career Corner menu above. Let me know if you have thoughts or questions.