Well, you don't have to be asked directly to do that. I assume, you work in senior position, so read your role description and contract, for most senior positio

Well, you don't have to be asked directly to do that. I assume, you work in senior position, so read your role description and contract, for most senior positions I have seen "mentoring" and "team leading" is explicitly written there. Sure, don't expect to get assigned time and classroom with whiteboard for teaching in typical company, as it is expected to be done on fly ("don't know something? go ask our guru").