Dennis O'brien, Cissp, Cisa
About Dennis O'brien, Cissp, Cisa
Dennis O'Brien is a Security Analyst 3 at TD Ameritrade with extensive experience in IT security and management roles across various companies.
Title: Security Analyst 3
Dennis O'brien holds the title of Security Analyst 3 at TD Ameritrade. He has been working in this capacity since 2020 in Westlake, Texas, United States.
Professional Experience: Senior IT Security Analyst
Prior to his role at TD Ameritrade, Dennis O'brien served as the Senior IT Security Analyst (Governance, Risk, and Compliance) at Enterprise Holdings. His tenure there was brief, lasting only 3 months in 2020, in the Greater St. Louis Area.
Past Roles: Senior Information Technology Auditor at Mercy
From 2017 to 2020, Dennis O'brien was employed as a Senior Information Technology Auditor at Mercy in the Greater St. Louis Area. He was responsible for overseeing IT audit processes for a span of 3 years.
Leadership: Director of Information Technology
Dennis O'brien took on the role of Director of Information Technology at Interstate Restoration Group from 2010 to 2016. Located in Fort Worth, TX, he led the IT department for 6 years, managing various technological aspects.
Education: University of Missouri-Saint Louis
Dennis O'brien completed his BSBA at the University of Missouri-Saint Louis. His educational journey there was notably brief, concluding in 1970.