Conversely, a leader can be anyone who has a particular talent, who is creatively thinking out of the box and has a great idea, who has experience in a certain aspect of the business or project that can prove useful to the manager and the team. A leader leads based on strengths, not titles.
Professionalism is defined as one’s conduct at work.
Acting like a professional really means doing what it takes to make others think of you as reliable, respectful, and competent. Depending on your role this can take on many different forms.