Looking for a professional business solicitor, on-going relationship

I require a business solicitor(s) to bring into our fold and use both with key clients and for ourselves. Please advise when you reply what area(s) of expertise you have for the following we seek. We need someone who has vast experience and advice, whilst our clients demand the credentials. Please also supply some detail about experience and how you see us working on a long-term basis.

-multi-national company set-up
-trademark
-shareholder and other corp agreements
-contracts surrounding various aspects of events and competitions
-liability advice

Thank you.