Prof. Quansah joined the Kwame Nkrumah University of Science and Technology (KNUST) in 2008 and has over 15 years of teaching and research experience. He currently serves as the Head of the Department of Meteorology and previously held the position of Coordinator for the Meteorology and Climate Science Programme. He is affiliated with the Ghana Science Association and holds a licentiate membership in the Institute for the Management of Information Systems (IMIS), England, United Kingdom.

His research focuses on climate change science, including mitigation and adaptation, with emphasis on greenhouse gas emissions, fluxes, and carbon cycling. His work also encompasses land-atmosphere interactions and surface energy balance processes, renewable energy systems, particularly solar energy, climate variability and extreme events and their environmental impacts, as well as land surface and atmospheric modelling, and the impact of aerosols on boundary layer meteorology.

He has played key roles in several major research and capacity building projects, including the Cloud Observation and Monitoring Equipment Project funded by the KNUST Research Fund, and the Wellcome Trust Climate Impact Study funded by the Wellcome Trust, which established a climate cohort in Ghana to assess health impacts of climate change, developed climate health data systems, and informed public health and adaptation policies. He has also contributed to the Air Quality and Pollution Prevention programme funded by the Clean Air Fund, which delivered a three-phase training programme across Ghana, West Africa, and Africa, integrating field observations, data analysis, hands on training, and stakeholder engagement to support evidence-based air quality management.

In addition, he co-led the WASCAL II CONCERT Project led by the West African Science Service Centre on Climate Change and Adapted Land Use and funded by the German Federal Ministry of Education and Research, which quantified greenhouse gas emissions using integrated observations and regional modelling and assessed climate and land use impacts to inform policy. He also participated in the WASCAL WRAP 1.0 Project, which focused on estimating carbon and energy fluxes over contrasting ecosystems in the Sudanian savanna region of West Africa.

Prof. Quansah contributes to the academic community by reviewing articles for journals such as Heliyon, Scientific African, and Agricultural and Forest Meteorology.