Security/advice

Hi;
How can I secure company and employe financial information? The accounting dept manager wants me just to setup the server(SQL) and make it accesseble for all employess, then he wants me not to get into the server after that. He pretty much wants to administer the server (Remeber, he does not have any knowlege administering a server). Please give me your idea from IT perspective how I can deal with this kind of issue. Who need to take care of the accounting/finacial info of a company (maintaing and administering a database and server)? The Accounting manager ot IT admin?