The phrase "to need this expertise" means that someone requires the skills, knowledge, or experience that someone else possesses in order to solve a problem or accomplish a task. Full definition
Though online teachers do not need expertise in all four communication areas, strong writing skills enables them to share their knowledge successfully. (360training.com)
Social media jobs have been considered to be offered by companies especially those that need the expertise of people who are aware of the consumer movement and needs online. (template.net)
You don't need any expertise to catch the baby and make sure it doesn't hit the floor. (skepticalob.com)