Part of a volume which explores current issues in service delivery to infants and toddlers with handicapping conditions (ages birth to 3), this chapter discusses issues relating to staffing of early intervention programs and reports the results of a study designed to clarify the staffing and teaming options currently used by selected intervention programs. Characteristics and strengths of three models of team organization are described: multidisciplinary, interdisciplinary, and transdisciplinary. Results of structured telephone interviews with administrators of 10 infant intervention programs are then presented, touching on the following areas: program staffing patterns (staff availability, core staff roles, and team structure); examples of team processes (assessment, program planning, and intervention functions); program components supporting team models (role release, communication, role of the developmental specialist, and parent roles). Among implications drawn from these interviews are that the same team model does not necessarily have to apply across all program functions and that team members need to be prepared to function as generalists as well as specialists in their own disciplines. (JW)