Jobs in the United States

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Added just now
Security Engineer III
Amazon.com Services LLC
Arlington, VA · Seattle, WA
AWS Security is looking for a Senior Application Security Engineer to help validate that our services, applications, and websites are designed and implemented to the highest security…
Added just now
Automation Engineer
Nicolet National Bank
Technology Center, WI
The Automation Engineer is responsible for designing, developing, deploying, and supporting scalable automation solutions that improve operational efficiency, reduce manual effort,…
Added 2 mins ago
J
Sr. QA/Test Automation Engineer
Jobot
Gaithersburg, MD
- $140,000 to $175,000 USD / year
…customers to deliver innovative solutions across cloud strategy, cybersecurity, systems integration, data engineering, machine learning, AI, disaster recovery, and enterprise infrastructure…
Added 2 mins ago
J
Software Engineer (JAVA)
Jobot
Gaithersburg, MD
- $140,000 to $175,000 USD / year
…customers to deliver innovative solutions across cloud strategy, cybersecurity, systems integration, data engineering, machine learning, AI, disaster recovery, and enterprise infrastructure…
Added 4 mins ago
Security Technology Engineer
Texas Instruments
Dallas, TX
…automation, analytics, resiliency, and lifecycle strategy. The engineer will work closely with Security Operations, IT infrastructure, Cybersecurity, Facilities, Engineering, Procurement,…
Added 5 mins ago
Cyber Resiliency Engineer Sr
Lockheed Martin
Mount Laurel, NJ
Apply your technical expertise in a collaborative fashion, to plan, design, develop, validate, and verify cybersecurity solutions across the system lifecycle.
Added 5 mins ago
Senior Corporate Security Engineer
Charlie Health
Nashville, TN · NY
The Senior Corporate Security Engineer role is responsible for designing, building and operating the technical security systems and controls that protect Charlie Health’s corporate…
Added 5 mins ago
Mulesoft Developer
Steampunk
McLean, VA
Engineer and implement solutions and provide recommendations for continuous improvement for the services provided
Added 5 mins ago
Senior MuleSoft Developer
Steampunk
Remote, United States
Engineer and implement solutions and provide recommendations for continuous improvement for the services provided
Added 8 mins ago
Senior Systems & Infrastructure Engineer
GEM Technologies
New York, NY
GEM Technologies is looking for an experienced Senior Systems & Infrastructure Engineer who enjoys solving difficult technical problems and taking ownership of them through resolution.
Added 8 mins ago
CO
Senior Systems Engineer
City of Avondale
Avondale, AZ
- $98,458.2 to $147,687.29 USD / year
The City of Avondale has an opportunity for a Senior Systems Engineer to join the Information Technology Department
Added 11 mins ago
Senior Full Stack Developer
LMI
United States
LMI is seeking a talented and mission-driven Senior Full Stack Software Engineer to design, develop, and modernize secure, scalable, cloud-native software applications and platforms…
Added 12 mins ago
Principal Site Reliability Engineer
Hitachi Global
Raleigh, NC · Houston, TX · Atlanta, GA · Broomfield, CO
Hitachi Energy is seeking a Principal Site Reliability Engineer to ensure the secure, reliable, and efficient operation of cloud‑hosted environments that support ESS software products and…
Added 12 mins ago
ML/DevOps Engineer
Language Access Network, LLC
Remote, United States
As a ML/DevOps Engineer specializing in cyber security, you will be responsible for architecting, automating, and maintaining secure CI/CD pipelines and cloud infrastructure. You will act…
Added 13 mins ago
Help Desk Engineer | Technical Support Engineer
Heritage Senior Living
West Allis, WI
Heritage Senior Living is seeking a knowledgeable, responsive, and customer-focused Help Desk Engineer to provide technology support to employees across our organization.
Added 13 mins ago
Sales Engineer
RedSeal
Remote, United States
As a Sales Engineer, you will establish and maintain positive and constructive relationships with customers as you communicate to understand their hybrid environment, security architecture,…
Added 16 mins ago
GA
Senior AI/ML Engineer - Generative AI for Software Development
GE Aviation Systems LLC
United States
- $130,000 to $173,000 USD / year
GE Aerospace Defense & Systems is seeking a Senior AI/ML Engineer to join our Emerging Technologies team in Grand Rapids, Michigan. In this role, you will help shape how large language…
Added 18 mins ago
Cyber Analytics Application Engineer
CACI
CYC LINTHICUM HEIGHTS, MD · Linthicum Heights, MD · Linthicum Heights
Job Title: Cyber Analytics Application Engineer
Added 21 mins ago
Infrastructure Engineer II
Dartmouth College
NH
The Infrastructure Engineer II is a hands-on engineer who builds, secures, and operates these platforms across on-premises and public cloud environments. Security is central to the role:…
Added 22 mins ago
Senior IT Support Engineer
Insight Global
Washington, DC
A company in the DC area is looking for a Senior IT Support Engineer to join their team. The Senior IT Support Engineer is responsible for the reliable, secure and effective delivery of…
Added 22 mins ago
SN
Senior Security Engineer, Microsoft Stack
Southern New Hampshire University
Remote, United States
- $106,684 to $170,727 USD / year
The Senior Security Engineer, Microsoft Stack will report to the Deputy Chief Information Security Officer. In this role, you will be a hands-on engineering role accountable for…
Added 24 mins ago
RL
Staff Information Security Engineer
Rithum LinkedIn Board
Remote, United States
- $170,000 to $220,000 USD / year
As a Staff Information Security Engineer, you own the intersection of AI adoption and information security: designing guardrails for AI-powered products, building automated security…
Added 24 mins ago
WS
Systems Engineer w/TS
Watershed Security
Jacksonville, FL
- $85,000 to $110,000 USD / year
Watershed Security, is a Veteran Owned Small Business with over 20 years’ Cybersecurity and Government Contracting experience. Watershed is looking for a hands-on Systems Security Engineer…
Added 25 mins ago
Test Readiness Engineer
Riverside Research Institute
Beavercreek, OH
Riverside Research is seeking a Senior NIAP Evaluation and Test Readiness Engineer to support the evaluation and certification readiness of secure communications products for national…
Added 25 mins ago
DevSecOps Cloud Engineer
Trace3
Colorado Springs, CO
The DevSecOps Cloud Engineer supports North American Aerospace Defense Command (NORAD) Cheyenne Mountain Complex (NCMC) Integrated Tactical Warning/Attack Assessment (ITW/AA) and Space…

Tolmo

Research Engineer, AI Security

San Francisco, CA, United States

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Job details

Posting language: English
Posted: Nov 2, 2026

Original job description

ABOUT TOLMO

Tolmo is cybersecurity for the age of AI. Coding agents now ship software faster than any human team can review or secure it; 100+ pull requests per engineer per week is no longer an outlier, and attackers are using the same agents to find and exploit weaknesses in days, not months. The old playbook of quarterly pentests and endless alert queues breaks at this speed.

We're building a new security playbook. Tolmo runs a fleet of AI security agents that reason over a live graph of your entire production system (code, CI, cloud, and telemetry) and continuously attack a faithful copy of it like a real adversary. Every finding arrives validated, with its blast radius and a remediation plan that lands in your workflow, ready for a coding agent to fix. Hours to integrate, days to your first validated finding.

We've done this before: Tolmo's founders built Sqreen (acquired by Datadog) and led security products that thousands of organizations trusted. We're backed by Accel and Y Combinator and just getting started.

THE ROLE

Our product is only as good as our agents' judgment. As a Research Engineer on AI Security, you make that judgment better and measurably so: how our agents plan, reason over a graph of a customer's production system, decide what is worth testing, and know when a finding is real.

This sits between research and engineering. In one week you might design an eval that catches a new class of false positive, change how an agent plans a multi-step investigation, compare models on a hard benchmark, and harden the agents themselves against prompt injection from the systems they inspect. You'll work directly with the founders, our engineers, and the security leads who run pentests with our agents, and your work ships to production.

WHAT YOU'LL DO

Agent reasoning: improve how our agents plan, use tools, and reason over a live graph of code, cloud, and telemetry, so they reach real findings faster and with fewer dead ends.
Evaluation: build the evals, benchmarks, and graders that tell us whether an agent actually got better, and make them part of how every change ships.
Model selection and tuning: compare models, prompts, and agent designs on cost, latency, and quality, and turn the results into production decisions.
Model and agent security: defend our agents against prompt injection, data exfiltration, and manipulation by the very systems they test, and research the security of LLM-based applications our customers build.
Reliability at scale: make long-running agents dependable across thousands of runs: verification, self-checks, and sensible stopping.
Learning from the field: study agent runs from customer engagements, find where reasoning broke, and turn each failure into an eval and a fix.

WHAT WE'RE LOOKING FOR

Hands-on experience building, evaluating, or improving LLM-based agents or systems in production.
A rigorous, empirical approach: you design experiments, distrust single anecdotes, and let the evals decide.
Strong engineering skills: you write production-quality code (Python, TypeScript, or Go) and build tools other people rely on.
A working understanding of security, or a strong drive to learn it fast: how real systems are attacked and how findings are validated.
Familiarity with LLM security risks such as prompt injection, jailbreaks, and tool misuse.
You build with AI coding agents daily (e.g., Claude Code, Cursor) and have opinions about what makes them reliable.

NICE TO HAVE

Research background in machine learning, AI safety, or security: publications, open-source work, or talks.
Offensive security experience: penetration testing, red teaming, bug bounty, or CTFs.
Experience with reinforcement learning, fine-tuning, or synthetic data generation for agents.
Experience with graph data models or reasoning over structured data.
Prior early-stage startup experience.

COMPENSATION & BENEFITS

Competitive salary, depending on level and experience.
Early-stage equity: you're joining early; you'll own a real piece of what we build.
Comprehensive medical, dental, and vision coverage, and the equipment you need to do your best work.
Based in San Francisco; we work in person.

Tolmo is building a team with wide-ranging backgrounds, perspectives, and paths into security; we think it makes our product and judgment better. If you're excited about this role but don't match every point above, we'd still like to hear from you. We're an equal opportunity employer and welcome applicants of every background.

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