It would depend on the scenario and there would need to be some details discussed but essentially yes I could be your SEO department. I have access to a number of trusted partners with whom I have worked with for years. Specialists are best doing what they know best and a team can easily and quickly be put together which I would head up if the work was too much in terms of man hours. All SEO strategy is my own but sometimes I use trusted partners for various aspects of delivery.