AM Oil Resources & Technology Inc. said Tuesday that it hired Keith Alan Johnson as chief executive officer. He replaces Anthony Miller, who has resigned.

The Valencia petroleum technology company said Johnson, who also will hold the title of president, has more than 30 years’ experience in the energy sector, including more than 20 years in transmission and marketing management at Southern California Gas Co., now Sempra Energy Utilities. Johnson also was executive vice president of marketing for Green Aero Energy, a wind energy technology company.

AM Oil designs and makes cost-effective and more environmentally friendly equipment to maximize production in oil fields.

Prior to the announcement, the company’s shares closed up 2 cents, or 8 percent, to 27 cents on the Over-the-Counter Bulletin Board.