| 2005-Present | 
                                      Karin Audit Company Limited | 
                                      Founder | 
                                    
                                    
                                      | 2003-Present | 
                                      Mahachai Hospital Public Company Limited | 
                                      Director and Audit Committee | 
                                    
                                    
                                      | 2020-Present | 
                                      TPP Healthcare International Company Limited | 
                                      Director and Audit Committee | 
                                    
                                    
                                      | 2015-2017 | 
                                      TPP Healthcare Accreditation Institute (Public Organization) | 
                                      Audit and Assessment Committee | 
                                    
                                    
                                      | 2004 | 
                                      Pipat and Associates Co.,Ltd. | 
                                      Partner | 
                                    
                                    
                                      | 1998-2004 | 
                                      Dharmniti Auditing Company Limited | 
                                      Director and Partner | 
                                    
                                    
                                      | 1998-1999 | 
                                      Mahanakorn University of Technology | 
                                      Lecturer | 
                                    
                                    
                                      | 1998-1999 | 
                                      Mahachai Hospital Public Company Limited | 
                                      Head of Internal audit department | 
                                    
                                    
                                      | 1987-1996 | 
                                      SGV-Na Thalang & Co.,Ltd. | 
                                      Lecturer |