Al Ammadi joined Diyar Al Muharraq in 2016 as head of investment and asset management and was appointed as CEO in August 2019. Diyar Al Muharraq is one of Bahrain’s largest mixed-use urban developments, spanning 12 square kilometers and comprising seven islands spread across 10 square kilometers of reclaimed land. The company has a joint venture with the U.A.E.’s Eagle Hills to develop Marassi Al Bahrain, a mixed-use project, including 6,600 residential units and 245,000 square meters of retail space, in addition to two hotels, the Address Marassi Al Bahrain and Vida Marassi Al Bahrain. In December 2022, Diyar Al Muharraq signed a deal with Jannat Real Estate Investments to build Matal Al Naseem over a commercial area of 21,322 square meters.