Alternate route certification programs for special education teachers have gained prevalence for several decades as states attempt to address national shortages of teachers who are adequately prepared to meet the needs of students with exceptionalities. This article presents an exploratory case study of the Washington Education Association (WEA) Teacher Residency Program, the first teacher union-sponsored alternative pathway for special education teacher certification in the United States. The program was co-designed with families and other members of the education community throughout Washington State with the purpose of increasing the number of certified special educators in the state. The case study examined the level at which WEA included evidence-based training components during the preparation program. WEA's collaboration with partner school districts, expectations from teacher residents, and the standards addressed during the program are reported. In addition, details of the collaboration with the Center for Innovation, Design, and Digital Learning (CIDDL) are described. The WEA case study will provide other collaborative community partnerships and alternate certification programs with a blueprint for integrating strategies to diversify the special education teacher workforce while maintaining high standards.