You can add a new director to your company, the process is carried out through MCA. There should be a written consent of the director to be appointed in the company. The existing board of directors has the right to add a director to the company.
A DIN (Director Identification Number) needs to be applied for if the new director is not registered with the Ministry of Corporate Affairs, Government of India.
The board also needs to pass the resolution for approving the appointment of a director. Post this the form is file with the Registrar of Companies.