I've been around the pediatric scoli world since 2008, and I have heard Timothy Oswald's name mentioned a number of times. He is in Atlanta I believe.
A great resource is the Scoliosis Research Society website. They have a free online physician-finder.
Gayle, age 50
Oct 2010 fusion T8-sacrum w/ pelvic fixation
Feb 2012 lumbar revision for broken rods @ L2-3-4
Sept 2015 major lumbar A/P revision for broken rods @ L5-S1
mom of Leah, 15 y/o, Diagnosed '08 with 26* T JIS (age 6)
2010 VBS Dr Luhmann Shriners St Louis
2017 curves stable/skeletely mature
also mom of Torrey, 12 y/o son, 16* T, stable