Every good manager worries about how to make teams work more effectively, because project success is directly related to how well your team works together.  And you, as the manager, are directly responsible for that.

We us a variety of techniques to support your team working, such as -

psychological assessment
role player identification
team building events
self-assessment mentoring.

Very frequently the participation of consultant "outsiders" can act as a facilitation and lightning rod to deal with difficult issues which people within the organisation are sometimes reluctant to address.

A team leader's project is key to his or her career.  So it is not surprising that budgets for consultant team facilitation are increasingly built into the project business case.

As one or our clients said -

I have a diverse team and am now using a different management style with each individual. I am getting the best out of them and I can see the performance has improved.