Daniel Esko is Assessment Development Program Manager at CASAS, where he oversees assessment design, item development, and assessment validation. He directs the Item and Test Development Department and works with assessment specialists, data analysts, and research staff to ensure CASAS assessments are valid, reliable, and responsive to the needs of adult education programs and learners. Daniel has developed large- and small-scale assessments for organizations in the United States and Asia, with experience spanning Adult Basic Education, Adult Secondary Education, and English as a Second Language. His work supports the development of assessment systems that serve diverse adult learners and workforce education programs.