Not sure about openings/waitlists, accessing services has been increasingly more difficult. Support jobs are low-paying/high stress:

Center for Autism and Spectrum Related Disorders at Kennedy Krieger: 443-923-7630, option 2;

Bloom Health Services: 667-668-2566

Complete Wellness: 443-438-7863

To access support programs (vocational, social, etc.) Clients have to be referred to most programming through them, the records you describe should be sufficient. There is an online .pdf that you can print and mail (they are in the stone ages), have to be diligent about following up.

Maryland DDA services: https://health.maryland.gov/dda/pages/howtoapply.aspx

Hussman Center for Adults with Autism: https://www.towson.edu/iwb/centers/hussman/programs/

League for People with Disabilities: https://www.leagueforpeople.org/youth-autism-services