Acting President Yemi Osinbajo had on Tuesday sacked the Director General, Department of State Service, Lawal Daura with immediate effect, over the invasion of the premises of the National Assembly on Tuesday.
On Tuesday, masked security operatives were seen blocking access to the parliament building in the capital Abuja.
"Mr. Seiyefa, who hails from Bayelsa State, was before his new appointment the most senior director in the DSS - Assistant DG".
Osinbajo had earlier met with Mr. Seiyefa at the presidential villa shortly after sacking Daura, and directing him to hand over to the most senior official in the service.
Some DSS operatives had blocked the National Assembly gate Tuesday morning.More news: 7.0-magnitude earthquake hits Indonesia; tsunami warning lifted
Seiyefa who replaces th sacked DG, Lawal Musa Daura, was in the villa ostensibly to receive briefing from the Acting President.
This is coming up after the Senator representing Kwara South, Rafiu Ibrahim, had alleged that senators belonging to the Parliamentary Support Group, PSG, received the sum of $1m each to impeach Senate President Bukola Saraki and his Deputy, Ike Ekweremadu. He later left for the DSS headquarters after the meeting to take charge of the security agency.
Saraki was also expected to meet with Mahmoud Yakubu, chairman of the Independent National Electoral Commission (INEC).
He also attended the University of Jos, where he obtained a Bachelor of Law (Honours) Degree in 1982, and was called to bar after attending the Nigeria Law School, Victoria Island Lagos.
Seiyefa, who came out of the Acting President's office around 5p.m, left the Villa in another auto.