Grímur Björnsson is the owner and founder of Warm Arctic ehf, a limited liability consulting firm registered under Icelandic law that largely comply with EU regulations and standards. Providing consulting services since early 2015 on topics related to geothermal reservoir engineering, green field development, well and wellfield strategies, well prognosis and nominal design, resource assessment and development decision making, numerical modeling and consulting to top management of geothermal companies worldwide. Work includes projects in the Philippines, Indonesia, Iceland, Nicaragua, the Caribbean, East Africa, Central Europe and the USA with a cumulative pipeline potential of more than 2000 MW and 500 MW in operation. Many 3-D well by well numerical geothermal reservoir models for various developers and investors worldwide, mostly under the iTOUGH2 inverse platform and on large scale Linux parallel computing platforms. Various documents regarding field development strategies, and how geothermal reservoir parameters couple into business models.