Contact your local International Dyslexia branch
www.interdys.org
They can connect you with local professionals in your area. Most O-G tutors are a member of the IDA and in their referral list.

My child has been going the Lemon Tree (813-854-3000)
for 6 months now. They use the OG method. I've seen great progess and the therapist is warm, kind and patient.

Check out the IMSLEC website. There may be lists of people who have certification in an O-G based program. You can also look at the IDA website at www.interdys.org to see lists of MSL programs, their comparisons and components. There are several which are O-G based and are intensive language therapy. Look for a person with certification and experience rather than someone who has just had some training. Different areas of the county may be more prone to having people with training in another O-G based program such as Sounds-In-Syllables, Wilson, Slingerland, or another. IDA has a complete list of certified MSL language programs. You should look for a program that certifies its instructors and actually observes their performance with students through a practicum of teaching.