In 2005, Governor Kathleen Sebelius appointed Rosen from a field of twelve applicants to the Kansas Supreme Court to replace Justice Robert Gernon, who died from cancer.
In 2005, Governor Kathleen Sebelius selected Rosen to serve on the Kansas Supreme Court in place of Justice Robert Gernon. Justice Gernon had passed away from cancer and was succeeded by Rosen among twelve candidates.