Professor Rieckmann is the Chief Physician of Neurology and Clinical Neuroplasticity at the Medical Park Loipl, Germany, and has been Chair of the MS in the 21st Century initiative since its inception in 2011. Between 2009 and 2017, he held the position of Director of the Neurological Clinic at the Academic Hospital in Bamberg, Germany.

Some of his major research interests include disease-modifying factors and regeneration in MS and functional aspects of the blood–brain barrier in neuroimmunological diseases; his clinical goals are focused on enhancing awareness and education surrounding MS. Professor Rieckmann has received numerous awards and research grants and has over 200 papers to his credit in peer-reviewed medical journals.