Alethe Denis is a Senior Security Consultant II at Bishop Fox specializing in red team social engineering, physical security bypass, and open-source intelligence (OSINT). With extensive experience conducting security assessments for both private and public sector organizations — including critical infrastructure — she brings a rare combination of technical depth and human-focused attack simulation to every engagement.
Alethe developed and owns Bishop Fox’s Tabletop Facilitation service line, designing realistic, scenario-driven exercises that help organizations stress-test their incident response capabilities.
A recognized leader in the DEF CON community, Alethe serves as Global DEF CON Groups Coordinator and Deputy Lead for DEF CON Groups Singapore, working to grow and support the international security community. She earned a DEF CON Black Badge at DEF CON 27 after winning the 10th annual Social Engineering Capture the Flag (SECTF) contest, compromising a Fortune 500 target using only a telephone. She and her teammates have also earned bronze, silver, Most Valuable OSINT, and Black Badge awards across multiple TraceLabs capture-the-flag competitions, including first place in the August 2020 DEF CON edition of the TraceLabs Missing Persons OSINT CTF.
Alethe has appeared on the Darknet Diaries podcast and has taken the stage at venues as varied as San Diego Comic-Con and the DEF CON main stage, and regularly supports conferences throughout the year with talks and workshops.
Aug 21, 2025
From Talent Shortage to Cybersecurity Talent Pipeline
Mar 31, 2025
Epic Fails and Heist Tales: A Red Teamer’s Journey to Deadwood
Feb 05, 2025
From Dial Tone to Throne: IVR Testing in the Spirit of The King of NYNEX
Jan 10, 2025
Navigating Workplace Security: Red Team Insights for the Return to Office
Aug 13, 2024
Manipulating the Mind: The Strategy and Practice of Social Engineering
Jan 04, 2024
Strengthening Cybersecurity Defenses: Validating Incident Response Plans with Red Team Tabletop Exercises
Wednesday, April 8
Tactics of Deception: Protecting Trust and Purpose
February 12, 2026
Bishop Fox at Wild West Hackin' Fest, Mile High 2026
January 27, 2026
Datadog State of Cloud Security Livestream
September 14-16, 2025
Alethe Denis to Speak at Dent 2025
August 28, 2025
Alethe Denis to Present at IAFCI International Training Conference & Exhibitor Show
Thu, Jul 24, 2025 – Sun, Jul 27, 2025
San Diego Comic-Con 2025: Exploring the Hacker’s Mind with DEF CON Black Badge Winner Alethe Denis
June 13, 2025
CybHER Conversation - From Black Badge to Red Team: Alethe Denis on Social Engineering and Offensive Security
Saturday, June 14, 2025
Alethe Denis to Deliver Keynote at 5th Annual Layer 8 Conference
Wednesday, April 9, 2025
Epic Fails and Heist Tales: Red Teaming Toward Truly Tested Security
February 14-15, 2025
Bishop Fox at CactusCon 13
October 9-11, 2024
Alethe Denis Shared Real-World Red Teaming Stories at at Wild West Hacking Fest 2024
News Insights: 23AndMe with Alethe Denis, Security Expert - Red Team
Pentest Tools Podcast: We Think We Know How to Explain the Value of a Penetration Test
Thursday, October 5, 2023 at 9 am PT / 12 pm ET
Combatting Adversaries: Proactive Social Engineering & Network Testing
April 22-23, 2023
Bishop Fox to Present at BSides San Francisco
On-Demand Virtual Session
Combatting Adversaries: Proactive Social Engineering & Network Testing
September 30 at 1:30 PM
Senior Security Consultant Alethe Denis is set to speak at Converge Security Conference
Defend Like A Girl: Hacking Your Way to Cyber Success
Join our livestream as host Alethe Denis and special guests Lindsay Von Tish, Jessica Stinson, Shanni Prutchi, and Katie Ritchie as they share their experiences as hackers and showcase how you can find success in the rapidly evolving world of cybersecurity.
Bishop Fox Live at DEF CON 30 featuring Alethe Denis
Listen to social engineering expert Alethe Denis share her stories and insight with our DEF CON livestream hosts Tom Eston and Joe Sechman.
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