The project manager is the king pin around which the whole organization revolves. He is entrusted with the task of integrating  the interdisciplinary and interorganizational efforts under changing environments efforts under changing environments for successful accomplishment of the specified objectives. He operates independently of the normal organizational chain of command, with the sole aim of achieving the specified goals within the available resources. He assumes total responsibility and accountability for the success or failure of the project. In particular his responsibilities include team building, financial control, contract management, technical management, resources management, interface management and quality management. His functions vary with the nature of the project and organizational setup, but his roles which refect the behaviour patterns identified with their specified position are similar in almost all types of projects.
Ten related roles of the project manager, generally, conforming to ‘Managerial Role Constellation’ advocated by Mintzberg are outlined below:

a)     Figurehead role

The project manager, is the legal and social head of the project, is the single focal point for making decisions, ceremonial functions and symbolic duties.

b)    Leadership role

As a leader, the project manager directs the interfunctional efforts through a complex web of relationships created in the project organization by building a performance-motivated organization a team of skilled and experienced people who collectively face the challenges posed by the people.

c)     Liaisoning role

The project manager maintains contacts outside the organization, deals with those activities which may involve correspondence and contact with the concerned government officials contract vendors, professionals, and top persons of the construction industry.

d)    Monitoring role

The project manager focuses a planned approach for performing tasks, and implements time, cost and quality planning and monitoring system for the project that highlights the commitment of the project team to provide assured results.

e)     Disseminator’s role

The project manager transmits the relevant information received from external sources and internal system to the concerned people in the work place. This information may be written or verbal, formal or informal.

f)      Spokesperson’s role

The project manager acts as the sole representative through whom all communications with the client or other external parties are conducted outside the project site.

g)     Enterpreneur’s role

The project manager seeks and identifies opportunities to promote improvements and needed changes.

h)    Disturbance handling role

The project manager maintains organizational harmony by resolving conflicts and diagnosing organizational behaviour an time. He applies corrective action when the organization faces important unexpected disturbances.

i)       Resources allocator role

The project manager takes responsibility for allocating/altering the project resources and makes any changes which are necessary to ensure the availability of adequate resources on time. This role also calls for developing and monitoring budgets and predicting future resource needs.

j)       Negotiator’s role

The project manager negotiates important conflicting issues and business related matters, both inside and outside of the project environment. He represents the organization on major negotiations. In order to fulfill his assigned role effectively and efficiently a project manager has to have managerial skill, technical expertise, business acumen, leadership qualities and excellent communication and interpersonal skills. He should be a person with at least a degree or equivalent in engineering, architecture or quantity surveying. He should have relevant management qualification and a wide construction experience, at least few years of which should be on senior positions in major projects.