The One-Stop Career Center system in the United States and the Jobcentre Plus system in Great Britain provide universal access to public employment services targeted at all job seekers, including people with disabilities, and employer services. Studies have identified challenges with these universal models in that some job seekers with disabilities may have additional or more intense support needs. Disability specialist positions provide one way of addressing these needs. This article examines their roles and responsibilities and their effectiveness in improving employment service delivery through these systems. The article highlights commonalities and differences associated with the roles between the two countries and discusses implications for improving effectiveness. Findings are based on a scoping review of existing empirical research that was conducted in 2008. The article concludes with directions for future research.