Meet the Sarpy CASA Staff Sarpy County CASA staff members are professionals that work to ensure CASAs assisting children in foster care are supported and well-trained. Please contact us at (402) 593-2259 to learn more. Tara WilliamsonProgram Director(402) 593-2259Email TaraJenn SimmondsAdvocate Coordinator(402) 593-1595Email JennAlexis SanteeAdvocate Specialist402-593-2224Email Alexis