A Techmarine (known as a Frater Astrotechnicus in High Gothic) is a Space Marine technician and engineer as well as a full Astartes Battle-Brother of his Chapter. They are fully initiated members of both the Cult Mechanicus and their Chapter. Prospective Techmarines are chosen from the ranks of the Space Marine Chapters for their affinity with technology. They learn how to divine the runes of engineering and study the liturgy of maintenance. This great body of lore must be committed to memory and understood by the novice Techmarine.
George Earl Abalayan