​Yes, a LinkedIn profile is a must-have for every professional. It is the best way to display your skills and experience to recruiters. Without a LinkedIn profile, recruiters won't be able to find you. Also, if you apply for a job, one of the first things a hiring manager will do is look you up on LinkedIn. If you don't have a LinkedIn profile, chances are they will see that as a red flag (you're old, out of touch, irrelevant in your industry, not good with technology, etc.) and will probably toss your resume as a result.