Will Networking Now Benefit Me in ~10 Years?

The author of the post is currently working in cybersecurity in the U.S. Air Force and has decided to stay for an additional 11 years to retire. They are wondering if actively participating in conferences for networking will be beneficial in 10 years when they look for a job. They have heard that finding jobs on LinkedIn is not the best method for obtaining the positions they desire and that it is better to build a network. However, they are concerned about the usefulness of a contact that is 10 years old.