Alexander is a lecturer in the Department of Statistics, University of Cape Coast, Ghana. He was a lecturer and a member of the School Research Committee (SRC) responsible for post-graduate research in the Department of Statistics and Operations Research, at the University of Limpopo, South Africa. His research interests include time series analysis with special focus on change points estimation, long memory and volatility modeling using financial time series data, application of generalized linear models such as Poisson, Generalized Poisson Regression, Negative Binomial Regression, Zero-inflated, Hurdle models (with non-Gaussian data in particular) in analysing incidence of diseases such as malaria, HIV-Aids among others, and stochastic processes -Markov Processes, Brownian Motion, Poisson Processes. He is an external examiner for North West University (South Africa) and has assessed several honours and master dissertations, and doctoral theses from North West University, University of Johannesburg and University of KwaZulu-Natal in South Africa and Kwame Nkrumah University of Science and Technology (KNUST), Ghana. He has also supervised a number of graduate and post-graduate students and currently teaching time series analysis, introduction to probability and stochastic processes to undergraduate and post-graduate students at the University of Cape Coast, Ghana.