The difficulties encountered by persons with ASD in employment and the need for both career assessment and transition planning service are well documented. A young person with ASD was given both quantitative and qualitative assessment tools. As revealed, both the occupational card sort and the instrument for value clarification were the most helpful among the tools adopted while the results of career interests exploration using both SDS-5R and Fabry and Bertinetti’s (2014) Career Interpersonal Identity Type Assessment could be misleading for clients with ASD, especially in case of high score in Social type. The findings highlight the importance of a comprehensive assessment using both quantitative and qualitative instruments in multiple domains, including exploration for strengths and talents.