Engr. Lamu started his career with Borno State Ministry of Works and Housing in 1986 after completing his One-year mandatory National Youth Service Corps with WRECA in Kano. He worked with Borno State MOW&H as Principal Mechanical Engineer till when he moved to National Electric Power Authority (NEPA) as Manager (Mechanical) in April 1996. He attended many professional courses and training workshops, which included NEPA pupil Engineer/Technologist Development programme, Supervised Pupilage programme at Shiroro Hydro Power Station, Supervised Pupilage Programme at Lagos Thermal Power Station, Egbin, and Management Development Training programme by Accenture.

In June 2002, he was promoted to Senior Manager (Mechanical) at Kainji Hy-dro Power Station. Engr. Lamu was elevated to the position of Principal Man-ager (Turbine) in August 2008, a position he held for a period of just a little above one year before he was transferred to Jebba Hydro Electric PLC to take on the position of Assistant General Manager (Maintenance) in October 2009. In August 2011, Engr. Lamu was appointed MD/CEO of Jebba Hydro Electric PLC, a position he held till the completion of privatizing the Electricity sector. The Board of Directors of Mainstream Energy Solutions Ltd, the succes-sor company that acquired assets of Kainji and Jebba Hydro Electric PLC ap-pointed him as the MD/CEO of Mainstream Energy Solutions Ltd in October 2013. A position he holds till date.

Engr. Lamu holds various Professional Qualifications such as:
 Fellow of the Nigeria Society of Engineers (FNSE)
 Fellow of the International Hydro Association (FIHA))
 Member, Council for the Regulation of Engineer in Nigeria (COREN)
 Member, Nigerian Institute of Engineering Management (NIEM)
 Member, Nigerian Institute of Mechanical Engineers (NIME)
 Member, World Energy Council (WEC)
 Member, Financial Reporting Council of Nigeria (FRCN)

In the course of his professional career, he attended a number of trainings and capacity building programme. Some of them include;
 Course on Power Plant Management in Accra, Ghana (June 2009)
 Course on Theory and Application on Incentive regulation (May 2011).
 Maintenance Training on Vibration and Balancing of large Composite Turbine and     Compressor Shaft.
 Course in AVIRA Program by INSEAD Business School, Singapore (September 2014)
 High Performance Leadership Programme, Oxford (November 2016)

To honor his achievements, he was awarded the following;
 Fellow, Institute for Government Research Leadership Technology
 Fellow Institute of Credit Administration
 Doctor of Science (D.Sc.) Honoris Causa from Common Wealth     University