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  • November 2022 - present:
    Representative of "Hellenic Society of Nephrology", section Nephrology.
  • June 2022 - present:
    Treasurer of the Board "Hellenic Society of Nephrology"
  • October 2021 - present:
    President of the Board of the "Hellenic Hemapheresis Association"
  • July 2020-present:
    Member of the Board "Hellenic Society of Nephrology"
  • May 2020-present:
    Medical Director of Private Dialysis Unit “Polyxenia-Renal”, Athens, Greece.
  • August 2018 - present:
    Medical Director Nephrology Department 417 Army Share Fund Hospital of Athens (NIMTS), Greece.
  • 2017 - present:
    Professor - Advisor Hellenic Open University. Main topic of interest Geriatric and Diabetic patients.
  • 2017-2018:
    Head, Department of Education, Hellenic Army General Staff, Medical Directorate.
  • 2017:
    Consultant Nephrologist Ioannis Griveas since October 1, 2017 is a Professor-Advisor at the Hellenic Open University.
  • 2011 - 2020
    Medical Director of Private Dialysis Unit “Nefroiatriki”, Athens, Greece. Consultant Nephrologist and Lt. Colonel of the Greek Army.
  • 2011 - present:
    Owner of Private Renal Clinic «Athens-Nephrology»
  • 2014 - 2017:
    Consultant Nephrologist 417 Veterans Army Administration Hospital of Athens (NIMTS), Greece. Consultant Nephrologist and Lt. Colonel of the Greek Army.
  • 2011 - 2014:
    Lead Physician Nephrology Department and then Renal Unit 401 Army Hospital of Athens, Greece.
  • 2009 - 2011:
    Fellowship to Nephrology Department/Renal Transplant Unit of Queen Elizabeth University Hospital, Birmingham, UK.
  • 2008 - 2009:
    Consultant of Nephrology and Major of Greek Army, Department of Nephrology, 401 Military Hospital, Athens, Greece.
  • 2007 - 2009:
    Consultant Nephrologist Satellite Renal Unit “Nefroiatriki”, Athens, Greece.
  • 2007:
    Seminar in Management of Health Units (Institute of Public Administration).
  • 2006 - 2008:
    Consultant of Nephrology and Major of Greek Army, Department of Nephrology, 417 Veterans Army Administration Hospital, Athens, Greece. My major topics of interest is clinical research in systemic diseases with renal involvement, plasmapheresis, immunoadsorption, several methods of renal replacement therapies, biocompatibility of haemodialysis dialyzers.
  • 2005 - 2006:
    Served in Greek Special Forces (Center of Education in Unorthodox War, Rendina, Thessaloniki), as Director of Medical Services (rank: Captain). Chief instructor of Medical Courses in Greek and International schools of Special Forces.
  • 2005:
    Consultant of Nephrology, Department of Nephrology, 424 Army Hospital, Thessaloniki, Greece
  • 2001 - 2005:
    Registrar in Nephrology at the Department of Nephrology, Papageorgiou General Hospital, Thessaloniki, Greece. During my educational program, I participated in the following activities:
    • 2 years I was appointed to the Nephrology Department (30 beds), where I had the opportunity to come together with all the spectrum of clinical nephrology (glomerulonephrities, acute kidney injury, systemic diseases, metabolic disorders, hypertension diabetes mellitus,etc).
    • I was trained in kidney ultrasound and I performed over 50 kidney biopsies by myself. At the same time I participated in pathological meetings concerning the clinical and pathological follow up of patients.
    • For one year I worked in the Renal unit of the hospital (220 patients). During this period I was trained in all methods of haemodialysis and in all renal replacement therapies in patients with acute kidney injury. In total, I attended in over 40,000 haemodialysis sessions and I placed over 600 catheters for haemodialysis.
    • For 6 months I worked in the CAPD unit (60 patients) of the Nephrology Department. I also placed over 60 peritoneal catheters.
    • For 6 months, I was member of the Transplant Unit of the department (50 patients).
    • I was also trained in all techniques of Apheresis (plasmapheresis, LDL-apheresis, immunoadsorption). The Papageorgiou Nephrology Department is pionner in the field of Apheresis.
  • 2002 - 2004
    During the period 2002-2004, I was elected as a member of the Scientific Council of Papageorgiou General Hospital.
  • 15/7/2004 - 30/9/2004:
    I volunteered in Olympic and Paraolympic Games of Athens as Doctor in the Department of Medical Services.
  • 1998 - 2001:
    Registrar in Internal Medicine at the Department of Internal Medicine of 401 Army Hospital of Athens. During the above period I served for 12 months in the intensive care unit doing 10 days of duty a month. I have been officially honored from Medical Army Administration for organizing Medical Courses regarding First Aid in the battlefield.
  • 1999:
    I graduated successfully the seminar “Advanced Trauma Life Support (ATLS)”, which took place in the Medical School of University of Patra, Greece.
  • 1996 - 1998:
    Served in Greek Special Forces (2nd Battalion of Parachutists, Aspropirgos, Athens), as a doctor, and graduated successfully all the academies of Special Forces.
  • 1996:
    Rotation at the following clinics of 401 Army Hospital of Athens: Internal Medicine, Surgery, Intensive care, Psychiatry, Neurology, Urology, Cardiology, Dermatology, Orthopedics, Ophthamology etc.
  • 1995:
    Diploma of Military Medical School, Aristotle University of Thessaloniki.