Dr. Khajik earned his MBcHB in Medicine and Surgery at Mosul University-Iraq, and went on to earn his MA in child's nutrition and growth from Oxford Brookes University in UK. He completed his Master’s degree in Childhood Studies (MA Childhood Studies) at Oxford Brookes University including department of child's education and psychiatry in UK. He taught at Kaplan International College in Oxford in the department of English language for six months. Currently, he is professional in child's nutrition and growth and he has great interest in pediatric neurology, and head of nutrition department at Zakho General Hospital in Iraq-Kurdistan.

Dr. Khajik has completed his dissertation work at Oxford Brookes University in 2013. It was about "How do children think about and understand healthy eating: comparing two exploratory case studies to tackle (address) childhood obesity. This research study was published in the university publishing site in 2014. His second research was article in the processing of publishing at EC pediatrics Journal site, and titled "The positive clinical consequences of early combined therapy of omega 3 and B12 vitamin in children under 5 with variable forms of cerebral palsy".

He has associate membership of Royal College of Pediatric and Child Health, RCPCH, membership of Oxford University Hospitals, membership of American Academy of Nutrition and Dietetics.

Dr. Khajik is the first Iraqis doctor who has been awarded MA degree and qualified as specialist in child's nutrition and growth from UK. In the meantime, he is continuous in his job as clinical specialist and researcher at Zakho General Hospital-department of pediatrics.

Child nutrition and growth; Child psychiatry; Pediatric neurology.