The clamour for engineering and infrastructure in national development in all spheres of development is more in the developed nations but the responsibility is no less for the developing economies/nations. A lot of effort has been made in sustaining engineering and infrastructural development in Nigeria; still there are more deficiencies in the formalization. Therefore this paper contributes to effort of formalizing the role it play in the national development. The sources of data were mainly on secondary source which rely on much of literature review and the analysis was analytical. The finding reveals the role of engineering and infrastructure in national development and its sustainability. It also state that institution should be established to set a clear plans and rule for service provision, regulate and monitor service quality, coordinate engineering and infrastructural project efficiently and equitably in maintenance of the existing infrastructure. The paper concludes that the government is encouraged to show more commitment to engineering and infrastructure development than ever. It also states that good quality engineering and infrastructure is necessary to avoid bottlenecks and services disruption and to support a range of importance activities in the economy. It was recommended that government should ensure that the standard and policies relating to infrastructural development are addressed and handled holistically. And that effective evaluation of contracts, consulting and construction services of the required professionals should be put in place for proper implementation.
Economic transformation and the provision of basic infrastructure to engender growth and development in any nation is vested in the construction industry hence the massive investment of the government in this sector. However, the expected gains of the construction industry have been eroded by the failure of many construction projects due to unethical professional practices on the part of the construction professionals. This study analyzed the causes and effects of unethical practices on the industry and project delivery with measures to combat the unethical practices among the stakeholders. The study adopted the survey design and a stratified random sampling technique was used to select 140 respondents. A structured questionnaire was designed and administered to construction professionals (Architects, Quantity Surveyors, Builders and Engineers). The relative importance index tool was used to analyse the severity of the factors identified. Findings revealed the absence of punishment for unethical practices (0.94), collusion between officials, consultants and contractors (0.91), availability of loopholes in project monitoring (0.89), weak law enforcement institution (0.87) and greed for money (0.83) among others as major causes of unethical professional practices which have serious effects on the construction industry. The result also revealed poor workmanship and substandard project delivery (0.88), high cost of construction (0.86), the collapse of structures/buildings (0.82), inflated contract sums (0.81), high maintenance cost (0.79), time and cost overrun (0.76) as the extremely severe effects of unethical practices in the industry. Prosecution and punishment of offenders (0.98), the whilstle blower protection policies and rewards (0.84), strengthening of institutionand anticorruption agencies (0.78), award of contracts on merit (0.75) and civil society participation and oversight (0.68) were identified as highly effective measures to curtail unethical professional practices. The study recommends that the government being a major actor should abide by the due process of contract award and letting, using Public Procurement Act (PPA) guidelines in executing all its construction projects. The professionals, contractors and clients’ representatives should also exhibit high professional excellence through adherence to professional ethics and codes of conduct.
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