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. He later joined the Federal Civil Service as Senior Legal Officer,
Nigerian Federal Ministry of Justice. He also held appointment as Assistant Legal Adviser in the Federal Capital Territory and Culture and Tourism.
Chairman Of The Code Of Conduct Tribunal At the age of 36, Danladi Umar was sworn in as an acting chairman of the Code Of Conduct Tribunal ("CCT"), the adjudication unit of the Code of Conduct Bureau established under the
Law of Nigeria. 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. He is the youngest person (age 40 years) to ever hold the office of chairman of the CCT. He was sworn in by the chief justice of Nigeria (CJN) and chairman of the National Judicial Council (NJC), Justice Aloysius
A. I. Katsina-Alu at the Supreme Court alongside two other new tribunal members, retired Justice Robert Isaac Ewa Odu and Barrister
Atedze William Agwaza, making up the three members of the CCT tribunal.
Trial of the Senate President of Nigeria On September 18, 2015, Danladi Umar made legal history in Nigeria by becoming the first judge in the country to issue an arrest warrant against a sitting senate president of Nigeria,
Bukola Saraki. His action against the third citizen of the country was unprecedented.
Arraignment of 6 Ex-Governors 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. == Assassination attempt ==