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John Harper Email & Phone Number

Cortex Domain Consultant at Palo Alto Networks
Location: Columbus, Ohio, United States 11 work roles
1 work email found @tenable.com 4 phones found area 614, 888, and 570 LinkedIn matched
✓ Verified May 2026 4 data sources Profile completeness 86%

Contact Signals · 1 work email · 4 phones

Work email j****@tenable.com
Direct phone (614) ***-****
LinkedIn Profile matched
3 free lookups remaining · No credit card
Current company
Palo Alto Networks
Role
Cortex Domain Consultant
Location
Columbus, Ohio, United States
Company size
17854 employees

Who is John Harper? Overview

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Quick answer

John Harper is listed as Cortex Domain Consultant at Palo Alto Networks, a company with 17854 employees, based in Columbus, Ohio, United States. AeroLeads shows a work email signal at tenable.com, phone signal with area code 614, 888, 570, and a matched LinkedIn profile for John Harper.

John Harper previously worked as Cloud Solutions Architect at Palo Alto Networks and Founder at Hackers Teaching Hackers.

Company email context

Email format at Palo Alto Networks

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{first_initial}{last}@tenable.com
86% confidence

AeroLeads found 1 current-domain work email signal for John Harper. Compare company email patterns before reaching out.

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Profile bio

About John Harper

Information security professional and outside the box thinker, helping to solve everyday security problems. Lover of knowledge and teaching others.Founder of Hackers Teaching Hackershttps://hthackers.comhttps://www.facebook.com/hackersteachinghackers/https://twitter.com/hthackers

Listed skills include Firewalls, Information Technology, Computer Forensics, Information Security, and 46 others.

Current workplace

John Harper's current company

Company context helps verify the profile and gives searchers a useful next step.

Palo Alto Networks
Palo Alto Networks
Cortex Domain Consultant
Columbus, OH, US
Website
paloaltonetworks.com
Employees
17854
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Company profile
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11 roles

John Harper work experience

A career timeline built from the work history available for this profile.

Cloud Solutions Architect

Current
Palo Alto Networks

Santa Clara, California, US

Nov 2024 - Present

Founder

Current
Hackers Teaching Hackers

Canal Winchester, Ohio, US

I created Hackers Teaching Hackers (HTH) so Information Security professionals (Red, Blue, Purple, etc.) could share, teach, and collaborate in a fun environment. I learn more through hands-on experience so I wanted that to be a key element of this conference. Come and join us! All skill levels welcome.

Jun 2014 - Present

Security Engineer

Tenable

Columbia, MD, US

Oct 2019 - Nov 2024

Consultant

Nationwide Insurance

US

Team Lead for the Attack and Penetration Testing Team:- Linux / Windows / Mac System Exploitation- Social Engineering- Targeted Phishing- Web Application / Web Service Exploitation- Password Hash Cracking- Mobile: Android / iOS / Blackberry / Kindle / Etc.- Wireless / Software Defined Radio (tinkerer)- SCADA: HVAC- Custom Tooling and Scripting- Living off.

Mar 2014 - Oct 2019

Principal Information Security Consultant

Cbts

Cincinnati, Ohio, US

Penetration TestingApplication Security ValidationVulnerability Scanning for PCI Compliance

Aug 2013 - Mar 2014

Principal Information Security Specialist

American Electric Power

Columbus, OH, US

Act as a highly technical team lead for GridSMART and tactical testing initiativesProvide expert level technical analysis through threat modelingLead team peer review meetings that address complex problems: Cloud solutions, BYODPerform reverse engineer initiatives on firmware/software and critical system hardwareWork closely with developers to improve code.

Sep 2010 - Aug 2013

Lead Security Engineer

The Home Depot

Atlanta, Georgia, US

Lead security liaison for various business portfolios on the Information Assurance team. Provide threat and vulnerability management services, security guidance and final approval for new initiatives. Additional responsibilities:Penetration testing and social engineeringPCI and SOX compliance reviewsRisk exception tracking and mitigationPolicies and.

Sep 2009 - Sep 2010

Senior Systems Engineer

Accelerated Building Solutions, Inc.

Responsible for the design and implementation of all network, server, and voice solutions.

Feb 2007 - May 2009

Senior Technology Protection Analyst

Huntington National Bank

Columbus, Ohio, US

Vulnerability scanning, Manage wireless detection and compliance system, Responsible for full disk encryption on mobile devices, Penetration testing, Manage anti-virus protection software, Work with outside vendors to implement products that match business needs, Provide security awareness training to associates, Ensure compliance with Sarbanes Oxley.

Feb 2001 - Feb 2007

Telecommunications Specialist

Metatec International

Responsible for all the Cisco data networks, both from a LAN and WAN perspective. This also included the administration of the Lucent Definity G3 voice system.

May 1998 - May 2000
Team & coworkers

Colleagues at Palo Alto Networks

Other employees you can reach at paloaltonetworks.com. View company contacts for 17854 employees →

DO Danya O. Danya O. Colleague at Palo Alto Networks Dallas-Fort Worth Metroplex, United States View → LF Lori Finch Lori Finch Colleague at Palo Alto Networks Plano, Texas, United States, United States View → RW Riley Wolfgang Riley Wolfgang Colleague at Palo Alto Networks Seattle, Washington, United States, United States View → MP Mark Perkins Mark Perkins Colleague at Palo Alto Networks San Diego County, California, United States, United States View → AG Amit Gupta Amit Gupta Colleague at Palo Alto Networks Gorakhpur, Uttar Pradesh, India, India View → CM Ca. Madhusudhan T C Ca. Madhusudhan T C Colleague at Palo Alto Networks Bengaluru, Karnataka, India, India View → FH Firas Hammad Firas Hammad Colleague at Palo Alto Networks Dubai, United Arab Emirates, United Arab Emirates View → SG Sendil Ganesan Sendil Ganesan Colleague at Palo Alto Networks Milpitas, California, United States, United States View → JR Jaswanth Ramireddy Jaswanth Ramireddy Colleague at Palo Alto Networks Bengaluru, Karnataka, India, India View → LM Linor Mocha Linor Mocha Colleague at Palo Alto Networks Tel Aviv-Yafo, Tel Aviv District, Israel, Israel View →
FAQ

Frequently asked questions about John Harper

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

What company does John Harper work for?

John Harper works for Palo Alto Networks.

What is John Harper's role at Palo Alto Networks?

John Harper is listed as Cortex Domain Consultant at Palo Alto Networks.

What is John Harper's email address?

AeroLeads has found 1 work email signal at @tenable.com for John Harper at Palo Alto Networks.

What is John Harper's phone number?

AeroLeads has found 4 phone signal(s) with area code 614, 888, 570 for John Harper at Palo Alto Networks.

Where is John Harper based?

John Harper is based in Columbus, Ohio, United States while working with Palo Alto Networks.

What companies has John Harper worked for?

John Harper has worked for Palo Alto Networks, Hackers Teaching Hackers, Tenable, Nationwide Insurance, and Cbts.

Who are John Harper's colleagues at Palo Alto Networks?

John Harper's colleagues at Palo Alto Networks include Danya O., Lori Finch, Riley Wolfgang, Mark Perkins, and Amit Gupta.

How can I contact John Harper?

You can use AeroLeads to view verified contact signals for John Harper at Palo Alto Networks, including work email, phone, and LinkedIn data when available.

What skills is John Harper known for?

John Harper is listed with skills including Firewalls, Information Technology, Computer Forensics, Information Security, Cisco Systems Products, Ceh, Ids, and Linux.

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