Mark Reardon
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Mark Reardon Email & Phone Number

CISO, EY U.S. Government and Public Sector (GPS) at EY
Location: Atlanta Metropolitan Area, United States, United States 9 work roles 1 school
1 work email found @ey.com 16 phones found area 404, 770, and 470 LinkedIn matched
✓ Verified May 2026 4 data sources Profile completeness 100%

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Work email m****@ey.com
Direct phone (404) ***-****
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Current company
EY
Role
CISO, EY U.S. Government and Public Sector (GPS)
Location
Atlanta Metropolitan Area, United States, United States
Company size

Who is Mark Reardon? Overview

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Quick answer

Mark Reardon is listed as CISO, EY U.S. Government and Public Sector (GPS) at EY, a company with 371494 employees, based in Atlanta Metropolitan Area, United States, United States. AeroLeads shows a work email signal at ey.com, phone signal with area code 404, 770, 470, and a matched LinkedIn profile for Mark Reardon.

Mark Reardon previously worked as CISO, EY U.S. Government & Public Sector (GPS) at Ey and Director of Information Security and Information System Security Officer at Fiserv'S Digital Channels Business Unit. Mark Reardon holds Ba, Applied Mathematics from California State University, Fullerton.

Company email context

Email format at EY

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{first}.{last}@ey.com
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Profile bio

About Mark Reardon

Information security and technology leader in financial, healthcare, and public sector settings. Expertise in building and executing an enterprise-wide security program in highly complex environments. Demonstrated ability to lead security during mergers and other periods of rapid change. Experience maturing software development, IT operations, and information security processes to achieve desired organizational objectives.Areas of ExpertiseSecurity Strategy, Policy, & Standards, DevSecOps & Pen Testing, Threat Intelligence & Modeling, Automated Software Testing Tools, Incident Planning & Response, Risk Assessment & Response, External & Internal Audits, End-point Protection, Transitioning to Cloud Services, Risk Management, Security Metrics, Corrective Action Planning, Vulnerability Management, Software Dev. Life Cycle, Security Operations Including SOC. Program & Project Management, Vendor Management, andSecurity Staff DevelopmentInternational and federal codes of practice including NIST’s FISMA and Cybersecurity Frameworks, HIPAA/HiTech, SOC 1 & 2 Audits, Payment Card Industry (PCI) Data Security Standard, ISO Security 27000 series, Sarbanes-Oxley Act, Gramm-Leach-Bliley Act, General Data Protection Regulation (GDPR), & California Consumer Privacy Act (CCPA)

Listed skills include Security, Information Security, Disaster Recovery, Information Technology, and 46 others.

Current workplace

Mark Reardon's current company

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EY
Ey
CISO, EY U.S. Government and Public Sector (GPS)
Atlanta, GA, US
Website
Employees
371494
AeroLeads page
9 roles · 34 years

Mark Reardon work experience

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Ciso, Ey U.S. Government And Public Sector (Gps)

Ey

Atlanta, GA, US

Ciso, Ey U.S. Government & Public Sector (Gps)

Current
Ey

London, GB

Feb 2021 - Present

Director Of Information Security And Information System Security Officer

Fiserv'S Digital Channels Business Unit
  • Directed remote, global team overseeing product development and operational security processes for Internet and mobile banking applications. Provided cybersecurity guidance to development and product marketing leaders.
  • Led security evaluation of approximately 70 base and 150 customized applications for 3,000 financial institutions and over 70 million consumers. This required close coordination with Enterprise Architecture and.
  • Approved all proposed changes to production systems as a member of the Change Advisory Board.
  • Developed security strategy for transitioning to cloud-based services using containers.
  • Supported FFIEC, PCI, SOC 1, and SOC 2 internal and external audits.
  • Conducted risk assessments for all security findings and oversaw the creation of remediation plans.
May 2018 - Sep 2020

Avp Of Information Security And Ciso

Marietta, Georgia, US

Led information security governance program for the largest healthcare organization in Georgia. Supported 2016 merger of 11 hospitals and over 250 practice locations into a single $3 billion per year healthcare system. Elevated the information security program from a focus on technical issues to include a strategic perspective that supported and enabled.

Jan 2016 - Sep 2017

Chief Information Security Officer

Atlanta, Georgia, US

  • Created state of Georgia’s information security governance program, overseeing strategy, policy development, compliance, and risk assessment/acceptance processes. Advised the governor’s office, policymakers, state CIO.
  • Integrated information security requirements into infrastructure outsourcing agreements valued at $1.2 billion, yielding savings of over $180 million to the state.
  • Conceived and implemented the cybersecurity component of the state’s Fusion Center, collaborating with federal authorities, National Guard, GBI, and GEMA to proactively detect and address cyber-terrorism.
  • Created State Cybersecurity Review Board to prioritize spending on risk management.
  • Brought state into compliance with PCI security standards. Remediation achieved rapidly, $7 million under budget, and reduced recurring credit card expenses by 50%.
  • Developed over 100 policies and standards based on FISMA framework and ITIL practices.
Jul 2005 - Jan 2016

Director Of Security Engineering

US

Integrated teams who unified the service delivery architecture for three security operations centers (SOC), two network operations centers (NOC), and seven data centers brought together by merger of TruSecure, Ubizen, and BeTrusted. Developed uniform COTS-based information security solutions for regional and international corporations, ensuring compliance.

Oct 2003 - Jul 2005

Consultant

Atlanta, Georgia, US

Senior Information Security Consultant to the Director of Information Security. Duties included formulating and documenting policy, standards, and procedures, assessing compliance, and developing mitigation steps for issues discovered.

2002 - 2003 ~1 yr

Multiple Leadership Positions

US

Grew start-up company into an industry leader in Internet-based banking and finance with a market cap of $8.4 billion and 2,600 employees. Held several leadership positions including VP of Software Development and Director of Information Security. Proposed and co-led realignment of company’s focus from military security technologies like PKI and secure.

Oct 1994 - May 2002

Lan Development

Dallas, TX, US

Managed the development of Ethernet and Token Ring interface cards for a family of VSAT terminals. Developed support for IP routing and Data Link Switching (DLSW) on VSAT systems.

1992 - 1994 ~2 yrs
Team & coworkers

Colleagues at EY

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1 education record

Mark Reardon education

  • California State University, Fullerton
    California State University, Fullerton
    Applied Mathematics
FAQ

Frequently asked questions about Mark Reardon

Quick answers generated from the profile data available on this page.

What company does Mark Reardon work for?

Mark Reardon works for EY.

What is Mark Reardon's role at EY?

Mark Reardon is listed as CISO, EY U.S. Government and Public Sector (GPS) at EY.

What is Mark Reardon's email address?

AeroLeads has found 1 work email signal at @ey.com for Mark Reardon at EY.

What is Mark Reardon's phone number?

AeroLeads has found 16 phone signal(s) with area code 404, 770, 470 for Mark Reardon at EY.

Where is Mark Reardon based?

Mark Reardon is based in Atlanta Metropolitan Area, United States, United States while working with EY.

What companies has Mark Reardon worked for?

Mark Reardon has worked for Ey, Fiserv'S Digital Channels Business Unit, Wellstar Health System, Georgia Technology Authority, and Cybertrust.

Who are Mark Reardon's colleagues at EY?

Mark Reardon's colleagues at EY include Paramjeet Singh Attri, Carlos Angulo Monroy, David Pistulka, Federico Camboni, and Jimmy Beatty, Crisc.

How can I contact Mark Reardon?

You can use AeroLeads to view verified contact signals for Mark Reardon at EY, including work email, phone, and LinkedIn data when available.

What schools did Mark Reardon attend?

Mark Reardon holds Ba, Applied Mathematics from California State University, Fullerton.

What skills is Mark Reardon known for?

Mark Reardon is listed with skills including Security, Information Security, Disaster Recovery, Information Technology, Cissp, Computer Security, Information Security Management, and Cloud Computing.

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