[6][7] After completing his studies, he started private practice in the chambers of Ayinde Sani and Co, Ibrahim Umar and Co and Kanu Agabi and Associates.

On July 11, 2011, he was appointed as the Chairman of the CCT, replacing his predecessor Justice Murtala Adebayo Sanni who died on January 24, 2011.

[17] On November 16, 2015, Danladi Umar had issued warrants for the arraignment of six former governors for falsifying their properties and personal wealth in their assets declaration forms, an action that is punishable under Nigerian laws.

[19] On his way to Bauchi for an official assignment, Umar's convoy was attacked by armed gunmen on the Keffi-Gitata Road in Nasarawa State.

[20] Ibraheem Al-Hassan, the Head of Press and Public Relations of the tribunal, stated that the security personnel guarding Danladi Umar engaged the gunmen in a fierce firefight, killing one of the assassins and wounding several others, who escaped.