This study attempted to assess the professional skills of ESL teachers of Capitol University (CU). Using descriptive and statistical methods, 31 ESL teachers in the SY 2009-2010 underwent self-evaluation and evaluation by the university administrators of their professional skills in the areas of lesson planning, textbook evaluation, use of media and computer, language teaching research, language testing and professional affiliation. Findings showed that the professional skills of these teachers were rated very good in the areas of lesson planning, textbook evaluation, and language testing; very good also in the areas of the use of media and computer and language teaching research but with some areas rated good only. In most areas of professional affiliation however the teachers were rated fairly good. Findings reveal areas where ESL teachers of CU can enhance their professional skill.