Ciso
Current
Jun 2024 - Present
AeroLeads people directory · profile
John Heasman Email & Phone Number
Chief Information Security Officer at Proof
at
Proof (formerly Notarize)
1 work email found
@chegg.com
2 phones found area 206
LinkedIn matched
✓ Verified Jul 2026
4 data sources
Profile completeness 100%
Current company
Role
Chief Information Security Officer at Proof
Location
San Francisco, California, United States
Who is John Heasman? Overview
A concise factual answer block for searchers comparing this professional profile.
Quick answer
John Heasman is listed as Chief Information Security Officer at Proof at Proof (formerly Notarize), based in San Francisco, California, United States. AeroLeads shows a work email signal at chegg.com, phone signal with area code 206, and a matched LinkedIn profile for John Heasman.
John Heasman previously worked as CISO at Proof (Formerly Notarize) and Chief Information Security Officer at Chegg Inc.. John Heasman holds Master'S Degree In Engineering And Computing Science, Engineering & Computing Science from University Of Oxford.
Company email context
Email format at Proof (formerly Notarize)
This section adds company-level context without repeating John Heasman's masked contact details.
{first_initial}{last}@chegg.com
86% confidence
AeroLeads found 1 current-domain work email signal for John Heasman. Compare company email patterns before reaching out.
Profile bio
About John Heasman
John Heasman is a Chief Information Security Officer at Proof at Proof (formerly Notarize). He possess expertise in vulnerability assessment, computer security, application security, security, penetration testing and 14 more skills.
Listed skills include Vulnerability Assessment, Computer Security, Application Security, Security, and 15 others.
Current workplace
John Heasman's current company
Company context helps verify the profile and gives searchers a useful next step.
10 roles
John Heasman work experience
A career timeline built from the work history available for this profile.
Chief Information Security Officer
May 2019 - May 2024
Deputy Chief Information Security Officer
Aug 2018 - May 2019
Senior Director Of Security Engineering
In my current role I manage the Security Engineering team, comprising of application security and vulnerability management functions, having built the application security team from the ground up.The core tenets of teams I lead are deep technical knowledge and an empathetic approach to interacting with other teams.
Aug 2017 - May 2019
Senior Director Of Software Security
Jun 2014 - Aug 2017
Lead Security Advisor
In this job role I worked on creating internal testing methodologies and building the reputation of the US office via managing and delivering penetration tests for new clients.In addition I promoted the company through presentations at security conferences and by providing interviews and quotes to the media on emerging IT security threats.
Sep 2012 - Jun 2014
Director Of Research
In this job role I was responsible for leading penetration tests requiring knowledge of new or specialist technologies. During this time I led a ten week assessment of Microsoft Exchange, a six week assessment of Microsoft Softgrid and a four month engagement with the Microsoft Vista team. In addition, I coordinated research projects undertaken by other employees that led to the publication of whitepapers and security advisories.
Sep 2006 - Sep 2012
Security Consultant
Dec 2003 - Sep 2006
Information Security Consultant
Defcom Information Security (Became Netsec)
Jul 2002 - Dec 2003
Intern
Worked with the IBM web hosting security team testing and configuring the precursor to Tivoli NIDS.
Jul 2000 - Sep 2000
1 education record
John Heasman education
-
University Of Oxford
FAQ
Frequently asked questions about John Heasman
Quick answers generated from the profile data available on this page.
What company does John Heasman work for?
John Heasman works for Proof (formerly Notarize).
What is John Heasman's role at Proof (formerly Notarize)?
John Heasman is listed as Chief Information Security Officer at Proof at Proof (formerly Notarize).
What is John Heasman's email address?
AeroLeads has found 1 work email signal at @chegg.com for John Heasman at Proof (formerly Notarize).
What is John Heasman's phone number?
AeroLeads has found 2 phone signal(s) with area code 206 for John Heasman at Proof (formerly Notarize).
Where is John Heasman based?
John Heasman is based in San Francisco, California, United States while working with Proof (formerly Notarize).
What companies has John Heasman worked for?
John Heasman has worked for Proof (Formerly Notarize), Chegg Inc., Docusign, Ncc Group, and Ngs Software.
How can I contact John Heasman?
You can use AeroLeads to view verified contact signals for John Heasman at Proof (formerly Notarize), including work email, phone, and LinkedIn data when available.
What schools did John Heasman attend?
John Heasman holds Master'S Degree In Engineering And Computing Science, Engineering & Computing Science from University Of Oxford.
What skills is John Heasman known for?
John Heasman is listed with skills including Vulnerability Assessment, Computer Security, Application Security, Security, Penetration Testing, Information Security, Reverse Engineering, and Java.
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