The head of Puerto Ricos power utility resigned Friday while facing scrutiny for the slow progress being made on restoring the islands power grid eight weeks after Hurricane Maria devastated the U.S. territory.

Ricardo Ramos, executive director of the Puerto Rico Electric Power Authority (PREPA), submitted his resignation, effective immediately, to the utilitys board.

His sudden departure comes days after Ramos testified before the Senate over a controversial $300 million contract he signed with a small Montana firm to restore power to the island territory.

The contract, which Puerto Rico officials canceled after the hearing, was suspect because the bankrupt utility chose Whitefish Energy over larger firms with lower rates and more experience in dealing with disaster-stricken areas, according to The Washington Post.