After NYSC in 1983, Malam Yashi was self-employed and actively engaged in politics, but soon decided to join the Civil Service as a career. In 1984, he was appointed Administrative Officer, Bauchi State Civil Service. He worked as the Bauchi State Government Liaison Officer in Lagos and was commended by the Military Governor in 1988. Malam Yashi transferred to the Federal Civil Service (Presidency) as Assistant Director, Office of the President, Dodan Barracks in 1990. He was thereafter Assistant Director (Supplies) General Services Office, The Presidency. He was also Deputy Director (Public Agencies and International Affairs) Political Affairs Office, The Presidency and then Deputy Director (Public Affairs) Political Affairs Office, The Presidency. 

In 1991, Malam Yashi served as Secretary, Abia/Imo States White Paper Committee on Assets Sharing. He was Deputy Secretary of the National Committee of Traditional Rulers and Leaders of Thought and also Secretary, Sub-Committee on University Crisis (1996). He was then posted as Ag. Director/Secretary, National Commission for Refugees (1996-1999), after which, he served as Ag. Director, Economic Affairs Office and Ag. Director (Special Duties) (OSGF) (1999-2000). After 10 years in the Presidency, Malam Yashi was posted to the Federal Ministry of Power and Steel as Deputy Director (Supplies), where he also acted severally as Director (Finance and Supplies) (2000-2002).

Malam Yashi was in 2002 promoted Director (Administration) with effect from 1st January, 1999 and served in the following MDAs as well as Overseeing the Offices of the Permanent Secretary severally, viz; Office of the Head of Civil Service of the Federation (2002-2003), pioneer Director (Administration and Supplies) Federal Ministry of Housing and Urban Development (2003-2007), Director (Administration and Supplies) Office of the Surveyor-General of the Federation (2007-2008), Director (Planning, Research and Statistics) Federal Ministry of Women Affairs and Social Development (2008-2009) and Director (Policy, Planning, Management and Research) Federal Ministry of Education, until his retirement in line with the then Tenure Policy of the Federal Government on 1st January, 2010. 

After his retirement, Malam Yashi was appointed Senior Special Assistant and Chief of Staff to the Honourable Minister, FCT at different times between April 2010 and July 2012. He resigned as Chief of Staff on personal grounds on 2nd July, 2012 and remained the Small Farmer that he had always been until the present appointment in 2019 by President Muhammadu Buhari, GCFR. 

Malam Yashi is a Fellow, Institute of Corporate Administration of Nigeria (Sept. 2006).