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John Zelczak has extensive work experience in the healthcare industry. John started their career as a Respiratory Therapist at West Penn Allegheny Health System in 1990 and worked there until 2005. John then joined PSA Healthcare as a Clinical Specialist and Clinical Coordinator from 2001 to 2006. After that, they worked at ADVACARE HOME SERVICES, INC as a Respiratory Manager and Medical Sales Representative from 2006 to 2015. Currently, they hold the position of VP of Respiratory, Clinical at Drive DeVilbiss Healthcare since 2015.

John Zelczak has a Bachelor of Science (BS) degree in Respiratory Care Therapy/Therapist from Indiana University of Pennsylvania. John also holds additional certifications as a Certified Pulmonary Function Technologist from NBRC and as a Registered Respiratory Therapist from NBRC. The specific dates of obtaining these certifications are not provided.