Former Liberal frontbencher Sophie Mirabella has been hired by mining magnate Gina Rinehart as a lobbyist and spin doctor in Canberra.

The dumped Indi MP was named on Friday as the first general manager of government and media relations for Ms Rinehart's company Hancock Prospecting.

"Given the continued growth of Hancock this is a very exciting time to include our first GM of government and media relations, and to welcome Sophie on our team," Ms Rinehart said in a statement.

"Sophie is not shy of hard work, and we are pleased that she has accepted this new challenging role with our hardworking executive team, and I look forward to her contribution towards the HPPL group."