Not all the ways you can make a difference with your work are directly related to your job description. In fact, many aren’t. For example, anything you do to improve the work environment for yourself and others will have a positive impact.
One way to do this is by helping to build a sense of community and connection. Clearly, unless you’re part of senior management, you don’t have the power to steer the whole company culture, but you can have an impact on your immediate surroundings. One way to foster a sense of community is to simply instigate chances for people to connect and talk outside the normal work setting, like group lunches, after-work drinks, even events like a baseball game. Start small, and keep building.