[9][10] In 1991, he joined the Fidelity Bank as Deputy Manager and head of Audit unit and rose to the position of executive director in October 2003.

[11][12] Obiano left the banking system to join Nigerian politics and in 2013 contested the November 16, 17 and 30 Anambra State gubernatorial elections on the platform of the All Progressives Grand Alliance, APGA.

[31] On 30 November 2021, the Peoples Gazette released an exclusive on bank documents showing that on 29 March 2017, Obiano had withdrawn over ₦4 billion from multiple Anambra security vote allocation accounts with no stated explanation.

"[33] Hours after Obiano left office and thus lost immunity from prosecution on 17 March 2022, he was arrested by the EFCC at the Murtala Muhammed International Airport in Lagos.

The reason for the arrest is yet to be announced but EFCC spokesperson Wilson Uwajaren said it was connected to the watchlist placement and that Obiano was attempting to flee the nation.