Undersea
                                       and Hyperbaric Medical Society  
                                       
                                       American College of 
                                       Hyperbaric Medicine 
                                        
                                        Lancaster
 General
                                       Hospital, active medical staff (since 1982)
                                        
                                       Lancaster Regional Medical Center, courtesy medical staff (since
                                       1983)
                                        
                                       Lancaster General
                                       Hospital Susquehanna Division, courtesy medical staff & Medical Director of Respiratory Care (1984-2003)
                                        
                                       York Hospital, provisional
                                       active medical staff (since 12/20/2006) 
                                       Heart of Lancaster Regional Medical Center, courtesy medical staff (since
                                       12/18/2006) 
                                       Lancaster City & County Medical Society (President 1990-91)
                                        
                                       Pennsylvania Medical Society
                                        
                                       American
                                       Medical Association 
                                        
                                       American College of
                                       Physicians--American Society of Internal Medicine  
                                       American
                                       College of Chest Physicians  
                                       American
                                       Thoracic Society
                                       American Academy of Sleep Medicine