His political vision aimed to ensure quality education for youths in the rundown areas of his senatorial district, by gaining the support of the federal government through special federal government support schemes, to rejuvenate literacy in such densely populated parts of Lagos State described by him as the most cosmopolitan and populated in Nigeria. Seriki also sought to advance gender sensitivity in politics and in public service opportunities. These key issues—along with housing, infrastructure development, and security—have remained cornerstones of his approach to politics. In 2011, Seriki defected from the PDP to the Action Congress of Nigeria. Political appointments Nigerian Ambassador to the Kingdom of Spain (2021–2022) In early 2021, Seriki was appointed by The President Muhammadu Buhari as Nigeria's ambassador to Spain. Minister of State for Interior (2009–2010) Seriki worked in tandem with the Minister of Interior in the formulation and implementation of policies towards the realization of the ministry's mandate. He chaired the Nigerian Civil Defence, Immigration, and Prisons Services Board and assisted in overseeing areas such as coordinating and ensuring harmony with the ministry's mandate. He was responsible for overseeing the Nigeria Prison Service, Federal Fire Service, Seaman Identity Certificate, and Registration of Marriages, according to governing laws of Nigeria. Minister of State for Defence (2008–2009) Seriki served as the Minister of State for Defence between 2008 and 2009. His responsibilities included overseeing the Military Pensions Board, in order to attain the objectives envisaged by the federal government. He, in tandem with the Minister of Defence, worked to formulate and implement policies within the purview of his mandated schedule. Under Seriki, there was effective oversight of the operations of the Armed Forces Resettlement Scheme and the welfare of ex-service personnel—including the Nigerian legion. He also oversaw matters relating to the honourable interment of deceased Nigerian armed forces personnel in war graves, as well as the documentation and preservation of Nigerian military history in military museums, including maintenance of the National Cenotaph. He coordinated the annual commemorative activities of the Armed Forces Remembrance Day Celebrations. During his tenure as minister of state, Seriki was appointed chairman of the Defence Health Maintenance Limited, a holding company for military health maintenance initiatives. During this time, he was also the chairman of the Ministry of Defence HIV/USDoD joint initiative to ameliorate the lives of HIV/AIDS-infected servicemen and their families. He was a member of the Joint Development Authority of Nigeria-São Tomé