Anthropic AI Security Fellow

London, UK; Ontario, CAN; Remote-Friendly, United States; San Francisco, CA

About Anthropic

Anthropic’s mission is to create reliable, interpretable, and steerable AI systems. We want AI to be safe and beneficial for our users and for society as a whole. Our team is a quickly growing group of committed researchers, engineers, policy experts, and business leaders working together to build beneficial AI systems. Apply using this link. We’re accepting applications on a rolling basis for cohorts starting in July 2026 and beyond. Applications for the May 2026 cohort are now closed.

AI Security at Anthropic

We believe we are at an inflection point for AI’s impact on cybersecurity. Models are now useful for cybersecurity tasks in practice: for example, Claude can now outperform human teams in some cybersecurity competitions and help us discover vulnerabilities in our own code. We are looking for researchers and engineers to help us accelerate defensive use of AI to secure code and infrastructure.

Anthropic Fellows Program Overview

The Anthropic Fellows Program is designed to accelerate AI security and safety research, and foster research talent. We provide funding and mentorship to promising technical talent - regardless of previous experience - to research the frontier of AI security and safety for four months. Fellows will primarily use external infrastructure (e.g. open-source models, public APIs) to work on an empirical project aligned with our research priorities, with the goal of producing a public output (e.g. a paper submission). In our previous cohorts, over 80% of fellows produced papers (more below). We run multiple cohorts of Fellows each year. This application is for cohorts starting in July 2026 and beyond.

What to Expect

Direct mentorship from Anthropic researchers
Access to a shared workspace (in either Berkeley, California or London, UK)
Connection to the broader AI safety research community
Weekly stipend of 3,850 USD / 2,310 GBP / 4,300 CAD & access to benefits (benefits vary by country)
Funding for compute (~$15k/month) and other research expenses

Mentors, Research Areas, & Past Projects

Fellows will undergo a project selection & mentor matching process. Potential mentors include:

Nicholas Carlini
Keri Warr
Evyatar Ben Asher
Keane Lucas
Newton Cheng

On our Alignment Science and Frontier Red Team blogs, you can read about some past Fellows projects, including:

AI agents find $4.6M in blockchain smart contract exploits: Winnie Xiao and Cole Killian,... mentored by Nicholas Carlini and Alwin Peng
Strengthening Red Teams: A Modular Scaffold for Control Evaluations: Chloe Loughridge et al., mentored by Jon Kutasov and Joe Benton

You may be a good fit if you

Are motivated by reducing catastrophic risks from advanced AI systems
Are excited to transition into full-time empirical AI safety research and would be interested in a full-time role at Anthropic

Please note: We do not guarantee that we will make any full-time offers to fellows... strong performance during program may indicate good fit.

Have strong technical background in computer science,... physics,... cybersecurity,... or related fields
Thrive in fast-paced,... collaborative environments
Can implement ideas quickly... communicate clearly

Strong candidates may also have:

Contributed to open-source projects in LLM- or security-adjacent repositories
Demonstrated success bringing clarity... ambiguous technical problems
Experience with pentesting,... vulnerability research,... offensive security
History demonstrating desire... high-quality outputs
Reported CVEs,... awarded bug bounty vulnerabilities
Experience with empirical ML research projects
Experience with deep learning frameworks... experiment management

Candidates must be:

Fluent in Python programming
Available full-time on Fellows program for four months

**We encourage you apply even if you do not meet every qualification... imposter syndrome... We think AI systems like ones we're building have enormous social & ethical implications... This makes representation important; strive diverse perspectives.

Interview process

Includes initial application & references check, technical assessments & interviews, and research discussion.

Compensation

Expected base stipend $3,850 USD/week (~$200k+ annualized), expectation of full-time hours (40/week) for four months.

Logistics

Work authorization required in US/UK/Canada; specified workspace locations London/Berkeley; openness to remote fellows in these countries; viz sponsorship not available; applications managed by Constellation recruiting partner. ...