The phrase "comfortable position" refers to a state where you feel physically or mentally at ease, without any pain or discomfort. It can also be used to describe a situation where you have a stable and successful position in life. Full definition
I know that these people who you want to join you are in comfortable positions at brand name companies and don't want to take the risk of joining you. (bothsidesofthetable.com)
That may be most comfortable position in the first days. (fitpregnancy.com)
Nursing in a more comfortable position for your baby may lead to breast preference. (lovingmomentsbras.com)