Assistant practitioners. Developing the role of the assistant practitioner can help employers ensure they have the right flexible mix of skills to meet complex patient needs, freeing up registered practitioners to deliver what they have been uniquely trained for.he Skills for Health Core standards for assistant practitioners defines the role as follows: “ An assistant practitioner is a worker who competently delivers health and social care to and for people. They have a required level of knowledge and skill beyond that of the traditional healthcare assistant or support worker.