Prof. Verhaz has been employed at the clinic since 1995, Clinical Center Republic of Srpska Banja Luka, Clinic for infectious diseases and a Specialist infectologist from 1999th at the Faculty of Medicine of the University of Banja Luka. In 2005 she has completed specialization in Gastroenterohepatology at the University of Belgrade and from November 2006 Prof. Verhaz has been acting as a National Coordinator for hepatitis Republic Srpska, appointed to this position by the Ministry of Health and Social Protection of the Republic of Srpska. In 2010 joined the Commission for Infectious Diseases at the Ministry of Health and Social Protection of the Republic Srpska and since 2012 she's a member of the Drug Commission of the Agency for Medicines and Medical Devices of Bosnia and Herzegovina. In 2012 the doctorate at the Faculty of Medicine of the University of Banja Luka acting as a Head of the Department of Infectious Diseases at the Medical Faculty of the University of the Republic of Srpska Banja Luka. Meanwhile she participated in the implementation of many projects regarding hepatitis B and C diagnosis and treatment. Since May 2014, she has been working as the Head of the Clinic for Infectious Diseases of the University Clinical Center Republic of Srpska Banja Luka. Through the years she has been active participant in many projects the trainings of trainers within the HIV/AIDS and hepatitis C topics and a lecturer at many Conferences e.g. at "6th Regional Conference on HIV / AIDS“ in Sarajevo in May 2012, "Global Fund" in Noeum in 2014, 2nd Central and Eastern European Meeting on Viral Hepatitis and Co-infection with HIV in Romania in 2016 etc. Prof. Verhaz is also a co-author of the Clinical Guidelines for the Treatment of HIV and AIDS in Bosnia and Herzegovina in 2013, and the amended edition of 2021.She has published dozens of scientific papers as an author and co-author, and participated in the production of several textbooks and books.