Relationships are deemed an important factor in determining one’s functionality. As individuals become young professionals, they enter the stage that requires many roles to play and experiences from childhood interplay. Therefore, the study intended to know the association between schema and attachment style on the interpersonal functioning of young professionals as mediated by coping styles. Two hundred fifty young professionals voluntarily participated through a convenient sampling technique. Analyzing the indirect effects, results suggested that among the schema sub variables, avoidance coping significantly mediated the following relationship with interpersonal functioning: disconnection and rejection, and impaired limit and performance (t=5.935, p=0.00). Among the attachment variables, avoidant coping significantly mediated the relationship between secure attachment and interpersonal functioning (t=2.436, p=0.015). Moreover, results showed that avoidant coping (β=.412, t=7.603), anxious attachment (β=.152, t=-2.53), and ambivalent attachment (β=.265, t=4.44) positively predicted problematic interpersonal functioning. This study concluded that coping partly mediated the connection between schema, attachment style, and interpersonal functioning. This means that coping style might impact the role of both schema and attachment to the interpersonal functioning of young professionals, while avoidant coping, ambivalent attachment, and anxious attachment could identify how healthy or unhealthy the interpersonal responses of young professionals. The findings illustrate the importance of early childhood relationships that determine an individual’s social interaction. Furthermore, the results showed how avoidant coping intervenes between an adaptive schema and attachment on interpersonal functioning. For future research, it is recommended to study effective interventions to avert or revert the development of any avoidant coping strategies to be used by employers or any academic institution.