This article describes how demographic considerations impact on employee engagement affect the ITES sector's capacity to sustain its human resource base. Supplementary factors may too affect the sustainability of human resources, but demographic aspects form the backbone of sustainability and are taken into account in this article. The first part of this article explains the many demographical elements that contribute to the sustainability of human resources, and the second part explains the implications of employee engagement by enforcing demography on the sustainability. To solve this problem, research on the variables influencing employee sustainability in the ITeS sector is required, with an emphasis on demographic traits in particular. The study is to identify why employees stay with these companies for a long time and to find the significant factors that support their continued commitment.