I have been approached by a large mult inational client that would like me to conduct a security audit for them. I have conducted dozens of secuity audits in the past, but none that are remotely of this magnitude. Therefore I seek recommendations for other firms that may handle such an audit. Of course I would like recommendations from people with first hand knowledge of the proposed companies previous engagements. Obviously the client has a great deal of faith in my abilities, but it is my belief that the project is beyond my scope. I would like to gracefully decline, but at the same time I would love to provide them with a few options.