Egypt is facing daunting challenges, a leading candidate for president said Sunday, presenting his decades as a senior government official as a prime reason to vote for him and not an Islamist.

Amr Moussa said Egypt is going through an economic and social crisis that requires the talents of an experienced statesman, not a president who learns on the job.

Egyptians pick a new president to replace deposed Hosni Mubarak in a process that begins May 23-24. It is unclear how much power the new president will have, as the process for writing a new constitution is snagged over disagreements about makeup of the body that will write the new document.

Moussa served as Egypt’s foreign minister under Mubarak and in 2001 moved over to head the Arab League. He resigned that post last year to run for president.

At a news conference Sunday in Cairo, he disagreed with the goals of Islamist parties, which have won clear majorities in parliamentary elections running on a platform of Islamic principles.

“I believe that Egypt has been injured, Egypt has been mismanaged and that Egypt should not get into an experiment that has not been tried before,’’ he said when asked about his top Islamist opponent, a member of Egypt’s powerful Muslim Brotherhood.

Such an experiment, he said, could enter Egypt “into a period of confusion.’’

Critics charge that Moussa’s record as a top official under Mubarak could mean his election would mark a return to the ways of the former regime, characterized by corruption, inefficiency and nepotism.

Egypt’s economy has been hard hit in the aftermath of the popular uprising. Tourism and investment rates have plummeted, foreign currency reserves have dipped dangerously and the national budget reels under the burden of heavy subsidies on fuel and basic food products.