Mark Jackson

Ottawa, Toronto

Mark Jackson is our firm’s expert in computer assisted auditing techniques, given his strong background in sophisticated IT environments and 10+ years in financial auditing.  Mark is also one of our resident experts in ACL, which is a tool used in audits to extract and analyze data.

Mark is a senior audit manager for Welch LLP. He joined Welch in 1999 as a co-op student and became full-time in 2002. He received his CA designation in 2004 and Certified Internal Auditor designation in 2012. He has experience in providing financial statement audit, compliance audit, accounting, as well as documenting, evaluating and testing internal controls for audited organizations. Mark has also conducted practice inspections on behalf of CPA Ontario.

Since 2004, Mark has been involved with the design and maintenance for the firm’s CaseWare (assurance engagement software) template files, which include the development of audit programs, year-end schedules and financial statements.

These templates have been used in several thousand client files at 12 Welch LLP offices across Ontario. In addition, Mark has provided training services to new staff at Welch LLP.

Mark qualified as a certified consultant for Sage 50 (Simply Accounting) in 2005 and has since provided consulting services for numerous clients in a variety of industries. Such consulting services have included installation, data conversion, training and support. Mark was also involved in the data mapping schemata for the initial establishment of the ACCPAC A/R module for the Billing and Collection Function for the Federal Communication Commission (USA).

Quick Facts


Bachelor of Mathematics; Masters in Accounting, University of Waterloo


Assurance, computer-assisted auditing techniques

Favourite Author/Book

Outliers – Malcolm Gladwell

Personal Accomplishment/most proud of?

My two children