Marco Antoniotti
Marco Antoniotti is a researcher at NYU were he develops Bioinformatics applications using (among other things) Common Lisp. He is also a Person on CLiki.

He is almost an old geezer who never touched a Symbolics machine (or a Xerox or a TI). However, has been fond of MCL and CMUCL.

You can find out a little more about him at the NYU Courant Bioiformatics Group site.

Some Common Lisp things he did include some code in the CLOCC, maintaining MK-DEFSYSTEM and ILISP.