The purpose of this study was to identify and specify knowledge and skills needed by adult educators in Thailand. This study provided information for establishing a guide to be used in professional training and in graduate programs in adult education. A three round Delphi technique was used to develop the consensus of findings. The first round solicited open-ended responses from twenty panelists. One hundred and twenty-five knowledge and skill statements, the responses from the first round, were developed into a five-point rating scale questionnaire. This questionnaire was utilized in both Round II and III. Median, mode and interquartile ranges were applied to specify the consensus of the panel of experts. The one hundred and twenty-five knowledge and skill statements, seventy-five knowledge statements and fifty skill statements, were classified into four major categories: teaching, administration, research and general experience. The experts for the study consisted of eleven non-formal education officers and nine university professors in adult/continuing education and non-formal education. From seventy-five knowledge statements, sixteen were rated at the highest priority of importance. Forty-nine statements were rated at above average priority of importance and two statements were rated at average. Eight statements did not meet the interquartile range criterion as a consensus of the panelists. From fifty skill statements, fifteen statements were rated at the highest priority of importance; thirty statements were rated at above average; one statement was rated at average; and four statements failed to meet the interquartile range criterion.