“…In part, professional accountants (traditionally known as the Big Four auditors) are likely to issue similar assurance statements to financial audits. They are subject to independent and professional conduct requirements (Peters & Romi, 2014), providing more detailed and consistent statements, transferring audit techniques to the assurance process (Power, 2003), and are more effective monitors as a result of their reputational capital (Simnett et al, 2009). Engineering and consultancy firms as assurance providers for qualitative statements have greater subject matter expertise on specific sustainability issues (Huggins, Green, & Simnett, 2011), providing assurance statements which are more informative, complete, and clear (Hasan, Roebuck, & Simnett, 2003).…”