Joseph Oyeyani Makoju is a Nigerian administrator and company executive who has served as the managing director of the West African Portland Cement Company (WAPCO) and the Power Holding Company of Nigeria (PHCN), formerly known as NEPA. He served the former at a time of harsh economic realities.
 Early life and education
Makoju studied engineering at the University of Nottingham thereafter, he got employment in U.K. as a mechanical engineer groomed to work at Ewekoro Works.
 Career at WAPCO
Makoju returned to Nigeria from the United Kingdom in 1976 and joined Ewekoro Works as the process manager. The Ewkoro works WAPCO plant then was the oldest out of the firm's two lines. He later served as production manager of Shagamu Works deputy works general manager and general works manager. After the completion of a training at the National Institute of Policy and Strategic Studies, he was posted to the corporate head office in Lagos as the deputy managing director. Makoju became the managing director of the firm in 1991, succeeding Mr Ogunleye.
Makoju's tenure as MD saw WAPCO at many times operating close to full capacity in a sector that was dominated by scarcity of cement, the cement industry in Nigeria historically has had to deal with image problems associated with high price, scarcity, government deals and distortions in the marketing process while WAPCO specially had to answer questions about its cement allocation system.
The firm in the 1995 financial calender was able to declare a high profitable value of 5.1 billion naira after entering the capital market twice in 1990 and 1992 to raise funds for increased capital investment mostly for the purchase of a cement grinding mill and replacement of quarry equipment.
 Career at PHCN
Makoju became the managing director of the power Holding Company of Nigeria in 2000. He was faced with the challenge of providing uninterrupted power supply to the teeming masses and to position the firm for privatization in the long term. At the beginning of his tenure, he was deputy head of a technical board that raised the power generating capacity of PHCN in the short term through the rehabilitation of power plants, installation of new units, reinforcement of the transmission system, construction of new transmission lines and sub-stations and expansion of the distribution network.
However, issues bordering on low gas supply to power plants, drop in water levels at Hydro stations, vandalism, theft contributed to reducing the maximum efficiency and power generation, failing to deliver on the government's electoral statements of uninterrupted power supply. By 2006, the country was facing a epileptic power supply and a potential national blackout.