Click to increase image sizeClick to decrease image size Additional informationNotes on contributorsMark Bigler Mark Bigler, CISA, CPA, is a senior EDP auditor for PacifiCorp in Salt Lake City UT. He has 12 years of experience in performing financial and Information systems audits. Bigler is the treasurer of the Utah chapter of ISACA, and is a member of the Institute of Internal Auditors and the American Institute of Certified Public Accountants.