According to the New York Times, creating computer simulations (sub. req.) is one job category with expanding demand. The article includes an interview with Bill Waite, chairman of Aegis Technologies Group:
“It almost doesn’t matter what kind of world you care about; you can use simulations,” Mr. Waite explained. “If you’re a defense agency, you want to create a simulation that will allow a missile that gets built to fly up to an enemy something-or-other and detonate. The same tools and same set of skills are used in the pharmaceutical industry to figure out how the little beads in a Bufferin are going to get from your stomach to your brain.”
He estimates that 400,000 people make a living in the United States in one aspect or another of simulation. His company employs close to 200 people, with an average salary of $85,000.
R is an excellent platform for creating simulations in industries as varied as financial engineering, experimental design, petroleum engineering and many others. Might be worth brushing up on your R skills if you're in the job market.