The last of our eight, Jean Tirole, already a leading microeconomist in 1988, still produces staggering amounts of top-notch research.
From the economist.com
His drawback is that he is another microeconomist in an administration with no prominent macroeconomist since Ms Romer and Larry Summers left.
From the economist.com
From the article above it looks like his only experience is in economics, and that anyway this new role will only be an add-on to his main job as chief microeconomist at the Treasury.
From the guardian.co.uk
More examples
An economist who specializes in microeconomics
(Micro-economy) Microeconomics is primarily focused on individual businesses and their actions in accordance with "supply and demand" theory.