Odds of Hanging On
Fortunately for you, your area of business only goes kaput if we do. Since your job is the "study of us," there will always be new human developments to explore, new man-made disasters to analyze.
Because the field is growing, especially with employment by the consulting industry as well as certain sectors of the Federal Government, you should be in good shape once your foot is in the door. Don't leave it there though, as some of those government types really slam doors shut with authority.