CV & Resume

Rafael Ortiz

For a detailed PDF copy of my CV please contact me at [email protected].

Education

MS Cybersecurity, 4.0, with Honors
Johns Hopkins University
05/2018 - 08/2022

BS Biomedical Engineering, Highest Honors
Georgia Tech
08/2011 - 05/2015

Experience

Current

Principal Linux Threat Researcher @ Sophos
07/2025 - ongoing

Past

Senior Linux Threat Researcher @ Sophos
08/2022 - 06/2025

Senior Security Researcher @ Red Canary
05/2021 - 07/2022

Security Researcher @ ElevenPaths Buenos Aires Lab
10/2017 - 05/2021

Cybersecurity Presales @ Telefonica Tech Cybersecurity
01/2021 - 05/2021

Cybersecurity Specialist @ Telefonica USA
02/2017 - 12/2020

Owner @ Poolsloth VRM Cryptocurrency Mining Pool
08/2017 - 05/2019

VOIP Network, System & Security Admin @ Specialty Telehealth Services
07/2015 - 02/2017

Telemedicine Communications Specialist @ Specialty Telehealth Services
06/2015 - 07/2015

Biomedical Engineering intern @ Skeletal Dynamics
06/2015 - 07/2015

Cofounder @ PillboxTV
02/2015 - 07/2015

Undergraduate Research Assistant @ Botchwey Lab, Georgia Tech
01/2013 - 02/2015

Other

Top Languages

Pre-2020 Top Languages

Here are the top five languages I use by hours, as recorded by [ActivityWatch](https://activitywatch.net/) on a monthly basis. | Month | 1 | 2 | 3 | 4 | 5 | |-------|---|---|---|---|---| | April 2021 | Rust | Python | C | Shell Script | JavaScript | | March 2021 | Rust | JavaScript | Java | Go | Python | | February 2021 | Python | Rust | Shell Script | Java | JavaScript | | January 2021 | Go | Java | TypeScript | Python | Shell Script | | December 2020 | Rust | Go | Python | JavaScript | Java | | November 2020 | Java | Go | TypeScript | C | Python | | October 2020 | Java | TypeScript | Shell Script | Go | Python | My new employer is less than thrilled to allow ActivityWatch on corporate machines, so the information stops at April. I do have some GitHub stats, but keep in mind these only use publicly available information.

Conferences & Speaking

(2022) every Boring Problem Found in eBPF, Way West Hackin' Fest (5-8 May)
    https://wildwesthackinfest.com/way-west/speakers-2022/
(2022) oxidebpf Toolshed Demo, Way West Hackin' Fest (5-8 May)
    https://wildwesthackinfest.com/way-west/speakers-2022/
(2019) High assurance digital assets and identities for humans and machines:
    building a trustworthy blockchain, Florida Blockchain Foundation Supply 
    Chain Digital Transformation Session 2: Blockchain Technology for Air Travel
    and Innovative concepts (2 July) 
    https://fbf2019.angage.events/editablepage/view/411
(2019) Blockchain in a real business, Florida Blockchain Foundation Digital 
    Transformation Session 1: Blockchain 101 (28 May)
    https://www.floridablockchainfoundation.org/events-1/supplychainworkshops
(2018) Breaking out HSTS (and HPKP) on Firefox and Chrome, Hack Miami 6 (19 May)
    https://web.archive.org/web/20180530170414/https://www.hackmiami.com/speakers-hackmiami-conference-6

Other Stuff I’ve Done

• CryptoClipWatcher, a Windows utility to defend against clipboard hijacking malware. Written in C#.
• ChainLock, a Linux and Android tool to protect sensitive files. Desktop application written in C and Python, with extensions. Mobile application written in Java. The project stands up a Tor hidden service to communicate. Ask me about it sometime, it’s a fun one.
• oxidebpf, a Rust library for managing BPF programs.
• redcanary-ebpf-sensor, a suite of eBPF programs for gathering security telemetry.

Other Places I’ve Written

• How to Make API REST Requests to Tor Hidden Services in an Android APK
• ChainLock, A Linux Tool for Locking Down Important Files
• Introducing oxidebpf: an open source Linux tool for Rust and eBPF developers
• eBPF for Security: a Beginner’s Guide
• every Boring Problem Found in eBPF

Patents

(2018) Methods and Systems for Multiple Independent Roots of Trust, 
    US 62/729,916 filed 11 September 2018. Patent Pending.

Papers

(2017) Sphingosine-1-Phosphate Receptor-3 Supports Hematopoietic Stem and 
    Progenitor Cell Residence Within the Bone Marrow Niche. Stem Cells, 35: 
    1040–1052. doi:10.1002/stem.2556

Posters & Abstracts

(2014) S1P receptor signaling coordinates shifting chemotactic gradients during
    hematopoietic stem cell mobilization. Hilton Head Regenerative Medicine 
    Workshop. March 2014

(2014) Coordinating hematopoietic stem cell trafficking through Sphingosine-1-
    phosphate receptor signals. Atlanta, GA: Immunoengineering Seminar. May 2014

(2014) Investigating sphingolipid-chemokine cross-talk during microvascular 
    remodeling using novel heparin hydrogels. Monterey, CA: North American 
    Vascular Biology Organization, Vascular Biology 2014

(2014) Sphingosine-1-phosphate receptor signaling is sufficient to mobilize 
    hematopoietic stem cells to peripheral blood. Southeastern regional lipid 
    conference, Cashiers, NC

(2014) Investigating sphingolipid-chemokine cross-talk during microvascular 
    remodeling using novel heparin hydrogels. Southeastern regional lipid 
    conference, Cashiers, NC.

(2014) Hematopoietic stem cell migratory activity is enhanced by Sphingosine-1-
    phosphate receptor 3 antagonism. Petit Scholarship poster session, Parker H.
    Petit Institute for Bioengineering and Bioscience.