Justin LeGrange

Thank you for taking the time to visit my blog - I hope you enjoy my content and learning more about me. The sidebar on this page has some extra facts about me, whereas beneath you'll find my work history and prior education!

Ever since I was a young boy, I’ve been fascinated with computers. As I grew up I tinkered more and more with computers, networking equipment - you name it, I more than likely played with it (or disassembled it - sorry Mom and Dad). Unfortunately, I didn’t pursue this any further until much later in college, opting to chase Aerospace Engineering instead.

Eventually I found my way back to computers at Oklahoma State University, gaining a Bachelor’s in Management of Information Systems. This kickstarted my love of computers again - in my classes I learned how to set up corporate networks in VMs and perform some system administration tasks on servers. During this timeframe I also started my first tech-related job with the university - I worked a help desk job re-imaging computers for the Athletics department.

Now, I love to research and break computers in new and unique ways as a penetration tester. I frequently challenge myself by playing CTFs on sites such as HacktheBox. I start (and sometimes finish!) different projects, both security-related and not, exploring different aspects of automation and exploit development. Above all, I continue to learn and grow so that I can be the best breaker I can.

Outside of work, I'm a husband, a cat dad, a runner, and a gamer. Notably I'm working on improving my half marathon time from my first time (2h:20m:24s) down to under two hours so that eventually I can take on a full marathon, and eventually (hopefully) a Boston-qualifying time.

Work History

Veracode - Senior Penetration Tester

February 2021 - Current

Facilitated web application and infrastructure penetration testing engagements including scoping, logistics verification, testing, and reporting. Contributed development to an internal web application that handled reporting notification functionality.

American Airlines - Penetration Tester

June 2018 - January 2021

Assisted penetration testing efforts through web application testing and network pentesting. Helped automate segmentation scanning processes via Python scripting. Lead red team efforts to create an internal adversary emulation program.

American Airlines - ADEPT Assoc. Infrastructure Engineer

July 2017 - June 2018

Handled access management for Hyperion systems. Installed and configured Nagios monitoring system and wrote processes surrounding operation and upgrades.

Oklahoma State University - IT Student Worker

September 2016 - July 2017

Scripted entire installation process, lowering turnaround time for computer imaging from ~2 hrs. to < 30 mins. Handled custom requests from coaching staff for equipment needs. Installed programs for staff on an as-needed basis.

Education & Certifications

eLearnSecurity Junior Pentester

Issued 2019

Unfortunately, this doesn't have a Credly or similar - it previously went to https://verified.elearnsecurity.com/certificates/16c74524-38c7-441c-be6e-dc0bfd13239b, but eLearnSecurity was acquired by INE, and so the domain is no longer valid.

Offensive Security Certified Professional

Issued February 2019

Bachelor's Degree - Oklahoma State University

2011 - 2017

BSE, Management of Information Systems with the Information Assurance option