I started working in industry and working on my MS degree simultaneously after completing undergrad. I can see the benefits to waiting a few years to return for your master’s degree but personally I have enjoyed working on both right away. I think doing both gives you the ability to supplement your real job with the courses you choose to take while also evaluating how you enjoy your current job to see if you would like to see what else is out there upon completing your master’s ad re-enter the job market.