Judge John G. Roberts - in his spare time
" In addition, Mr. Roberts has devoted much of his time to pro bono work. For instance, he represented a class of District of Columbia residents receiving welfare benefits, arguing that a particular change in eligibility standards that resulted in a termination of welfare benefits without an individual hearing denied class members procedural due process.
In another pro bono case, United States v. Halper, Mr. Roberts was invited by the Supreme Court to represent Mr. Halper, who had been previously convicted under Federal criminal law for filing false Medicaid claims.
He successfully argued that the Double Jeopardy Clause barred the imposition of civil penalties under Federal law against an individual who had been convicted and punished under criminal law for the same conduct.
Mr. Roberts also participates extensively in the pro bono program of his firm, assisting his colleagues prepare pro bono appeals on matters such as termination of parental rights, minority voting rights, noise pollution at the Grand Canyon, and environmental protection of Glacier Bay."
Inside HigherEd also points out he has been involved in multiple cases involving academia - both sides
I guess it is too late to call him in for pro-bono cover against PA State Senate Select Committee Witch Hunts...