The job duties of a reservoir engineering advisor focus on working to evaluate and develop a plan for extracting fossil fuel reserves for oil and gas companies. In this career, your responsibilities revolve around the assessment of fuel reservoirs and the development of technical plans for subsurface drilling and extraction. You may evaluate the potential of wells and forecast results based on technical data and analysis. You may work with geoscientists to create 3D models. The reservoir changes during extraction, so you may need to remain on site and update your models and forecasts based on these changes.