Al Rettenmaier joined Cool Planet in 2013. He previously led two alternative energy startups, New Generation Biomass, producing power from biomass, and Integrated Energy Solutions, integrating CO2 sequestration and algae biomass harvesting with coal based power generation.. At EPC leader Black & Veatch, Al served as a process engineer,. business development manager and VP, client executive and AVP. He began his career as a process engineer for Ethyl Corporation, a Fortune 150 specialty chemical company.. Al reviews renewable energy grant applications as a bioenergy/biotech expert for the National Science Foundation. He is cited as a global expert in gas to liquid capital projects.