- Cody Gold Medal - 1993 - Ranked first of 256 students - University of Toronto Medical School
- Dr. Herbert Alexander Bruce Medal - 1993 - highest aggregate standing in anatomy, physiology, pathology and surgery
- Dr. C. S. Wainwright Memorial Scholarship - University of Toronto - 1992
- Dr. Kenneth Piafsky Memorial Medal and Prize - 1992 - highest standing in Year 2 and 3 Pharmacology
- Saddington Medal in Pathology - 1991 - highest standing in pathology
- Medical Alumni Association Scholarship - University of Toronto - 1991
- MDS Prize in Laboratory Medicine - 1991 - highest cumulative standing in pathology, microbiology and clinical biochemistry
- CC Medical Society (Ontario) Scholarship - 1990 - highest standing in anatomy
- James W. Pearce Memorial Award in Physiology - 1990 - highest standing in physiology
- Saul Rauxlen Scholarship - highest pre-admission average to the Faculty of Medicine, University of Toronto - 1989
- University Scholarship - McMaster University - 1989
- Shenstone Prize - McMaster University - 1988 - highest average in physics, chemistry and biology
- Canadian Foundation for Ileitis and Colitis Summer Student Scholarship - 1987 - first Canadian high school student to be awarded this prize
- George and Nora Elwin Scholar - McMaster University - 5 scholarships awarded in Canada - 1987

He continued his training in Dermatology at the University of Toronto. He carried out his residency training at: Women's College Hospital, Wellesley Hospital, Hospital for Sick Children, McMaster University Medical Centre, Toronto General Hospital, St. Michael's Hspital and Sunnybrook Hospital.

Licentiate of the Medical Council of Canada, Parts I and II - 1994 FLEX Examination 1994 Fellow of the Royal College of Physicians and Surgeons of Canada (Dermatology) 1997 Diplomate of the American Board of Dermatology 1997 - Successful Recertification 2005

Dr. Vignjevic continues to keep up to date by attending meetings and conferences both locally and internationally.

Dr. Vignjevic has been in practice in the Hamilton area since July 1997. He is currently on staff at the Hamilton General Hospital where he sees inpatients. He also participates in monthly city-wide dermatology rounds and the dermatology journal and literature review club in Hamilton.

Dr. Vignjevic is an Assistant Clinical Professor of Medicine at McMaster University Medical School (DeGroote School of Medicine) and is involved in teaching medical students, residents and family physicians, both at the university and in his office. Recently, he has begun teaching dermatology residents at the University of Toronto. Furthermore he participates in the McMaster Mini-Medical school program open to the public each spring.

He is an active member of the CDA (Canadian Dermatology Association), Toronto Dermatological Society and is now the Chair for the Section of Dermatology for the Hamilton Academy of Medicine.

Dr. Vignjevic is a dermatology consultant for the media.

He has been interviewed on: CH News (Hamilton)CTS Television, 900 CHML (Hamilton), 1290 CJBK (London), 650 CKOM (Saskatoon) and CTV News.

In addition, he is used as a resource and has been quoted in:Flare, Canadian Living Magazine. Fashion, Fashion 18, CARP (Canadian Association of Retired Persons Magazine), Elle Canada, Glow Health, Hamilton Magazine amd Glow Magazine.