Nwaoboshi began his career in 1979 as an aide to
Samuel Ogbemudia, Governor of the defunct
Bendel State. Subsequently, he was appointed chairman of the
Nigerian Railway Corporation. In 1999, he was also a political adviser to Governor
James Ibori. In 2000, he was appointed Commissioner for Agriculture and Special Duties in Delta State where he served in that position till 2006. In 2008, he was appointed State Chairman of the
People's Democratic Party in Delta State. He served for a second term as State Chairman in 2012 and in 2014 resigned to run for senate. In 2015, he was elected into office as a Senator representing Delta North senatorial district in the
National Assembly. He was subsequently appointed Chairman Senate committee on Niger Delta. In 2019, he was re-elected into the senate under the People's Democratic Party. On 23 June 2021, the Delta State PDP suspended Nwaoboshi for "anti-party activities after a public spat between Nwaoboshi and
Governor Ifeanyi Okowa. Nwaoboshi called the suspension "laughable" and "illegal" before leaving the PDP two days later and joining the APC at a meeting with President Buhari and
Delta Central Senator
Ovie Omo-Agege.
The Punch reported that Nwaoboshi's switch was in preparation for a run for Deputy Governor of Delta State.
Election dispute On 3 April 2019, a Federal High Court in Abuja sacked Nwaoboshi as Senator-elect for Delta North senatorial district on grounds that he was not validly nominated in the party primaries held by the People's Democratic Party in Delta State. He was also ordered by Justice Ahmed Mohammed to stop parading himself as senator-elect. According to the summons filed against him by his opponent in the party primaries, Prince
Ned Nwoko stated that the People's Democratic party had unlawfully announced him the winner after he was defeated in the primaries, it was also alleged that Nwoboshi hired thugs to cause a mass scare and stampede when he learnt of his brewing defeat. On 4 April 2019, Nwaoboshi appealed to the judgement sacking him as senator-elect. On 17 April 2019, a Federal High Court in Abuja denied Nwaoboshi's appeal to issue a restraining order to
Independent National Electoral Commission stating that it was out of its jurisdiction as an Appeal court had already ruled on the case, consequently the Justice
Mahmud Mohammed ordered that Independent National Electorate Commission should withdraw the certificate of return issued to Nwaoboshi and reissue a new certificate to Prince Ned Nwoko. Although he is now the Delta North Senator. On 11 May 2019, the Independent National Electoral Commission withdrew the certificate of return issued to Nwaoboshi. The certificate was returned when the court decision was overturned.
Bills sponsored In 2016, Nwaoboshi sponsored a bill "
The Code of Conduct Act Cap C15 LFN 2004 (Amendment) Bill, 2016 (SB 248)". The bill passed its first reading but was never signed or implemented into law. == Corruption allegations ==