Marshall is a parent-advocate whose daughter, now 26, started using Cued Speech in Fairfax VA at age 6. For the next 8 years he actively advocated for an appropriate inclusive education for children with disabilities at the county, state and federal level with testimony, leadership of local deaf education organizations and as NCSA representative in Washington, DC. Relocated to Raleigh, NC since 1994 he is again participating in the NCSA as its Treasurer.