Prof. Mellau graduated with a Bachelor of Veterinary Medicine (BVM) degree 1990 and a Master of Veterinary Medicine degree, from Sokoine University of Agriculture (SUA) in 1996. He holds Doctoral Degree (PhD) from the then, Royal Veterinary and Agricultural University (RVAU) in Copenhagen, Denmark. He worked with SUA since 1990 and rose through academic ranks to the level of Professor in 2011. He served as a Head of Department of Veterinary Medicine and Public Health between 2008-2014 and briefly as the Dean of Faculty of Veterinary Medicine in 2014. He was appointed Deputy Vice Chancellor responsible for Academic, Research and Consultancy (DVC-ARC) effective December 2014.