Mohammed al-Asam of the Sudanese Professionals Association told AP that "we are ready with a clear plan for a transition with qualified names."
The association drove four months of protests that led to the ouster and arrest of Sudan's leader Omar al-Bashir earlier this month. Al-Bashir was replaced by a military council. Protesters demand a speedy transition to civilian rule.
Al-Asam, a 28-year-old doctor, said in an interview late Saturday that the military council is becoming more powerful every day and that "this is dangerous to the revolution."
He said protesters also demand the arrests of additional members of the Bashir regime.