David Trimner has provided tax consulting services to nonprofit organizations for over 20 years.  While he is not an auditor, he has worked for several audit firms, including “Big 4,” “Second-Tier,” and regional firms.  He provides this inside look into how a nonprofit organization can write an effective request for proposal (RFP) and then successfully interview and select an audit firm.Executive SummaryEnsure that the prospective auditors demonstrate that they understand your organization’s structure and programs during the interview. Don’t be influenced by a fancy written proposal designed by sophisticated marketers if it tells you little about the team’s relevant skills....