William Johnson William Johnson Technical manager for heat pumps, Omnie A graduate mechanical engineer with over 20 years experience in commercial and industrial refrigeration. William worked as a Regional Manager at Earth Energy from 2006 to 2010; responsible for installation of the Ground Source Heat Pump range. Prior to joining Omnie William spent a number of years maintaining and commissioning heat pumps. William has an extensive working knowledge of heat pumps, including applications, leading to an understanding of the benefits of a correctly designed and installed system. He is passionate about the development of heat pumps in the UK, and understands the import role this technology is playing in renewables obligations and carbon reduction.