OP this is the list from previous posts - couple years old though. Not sure if anyone is good with shy kids in the list below as we don't have any personal experience. Anyone who has been through can share their experiences.
Here's a list of "good with shy kids" testers (compiled from posts here):
Dr. Diana Dahlgren in Fairfax
http://drdianadahlgren.com/Home.aspx
Dr. Suzie Muir in McLean
http://testingld.com/
Dr. Joel Adler in Bethesda
http://www.joeladler.com/
/** Below is retired **/
Virginia Smith in Vienna
Virginia M. Smith, Ph.D. PLLC
380 Maple Ave., West Suite 303B
Vienna, VA 22180
703-938-5234 # 1
virginiasmith@verizon.net
Dr. Ana Daroowalla with Dietzel Butler in Silver Spring
http://dietzelbutler.com/
Anthony Henley in Rockville, Herndon and Springfield
http://anthonyhenleypsyd.com/
Dr. Bronwen Rankin in Falls Church
http://www.novapsychology.com/about/dr-rankin/
Paige Fegan at Family First Psychological Services in Vienna - www.familyfirstva.com.
Dr. Linda McGhee in Chevy Chase MD
http://www.drlindamcghee.com/