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Added 11 mins ago
BB
Specialist III-IC Quality Assurance
BMO Bank N.A.
Naperville, IL
- $115,768.98 to $151,800 USD / year
…automation during bundle release, including script review, script development, and script execution; and Serving as an escalation point for project stakeholders and org. leadership and…
Added 11 mins ago
BB
Specialist III-IC Quality Assurance
BMO Bank N.A.
Naperville, IL
- $115,768.98 to $151,800 USD / year
…automation during bundle release, including script review, script development, and script execution; and Serving as an escalation point for project stakeholders and org. leadership and…
Added 19 mins ago
G
Senior Project Manager | Commercial Construction
GPAC
Ann Arbor, MI
- $120,000 to $150,000 USD / year
Job Title: Senior Project Manager – Commercial & Multifamily Construction
Added 23 mins ago
Restaurant Manager - Unit 1185
Whataburger Restaurants
United States
As a Restaurant Manager, you’ll oversee a high‑volume restaurant with average annual sales of $4M+ and an average team size of more than fifty Family Members. You’ll create an environment…
Added 27 mins ago
Value Stream Manager - Livonia Area
The Pivot Group Network
Livonia · Livonia, MI
Are you ready to take on a challenging and rewarding opportunity in value stream manager? The Pivot Group Network, a Michigan manufacturing-focused recruiting group, is committed to…
Added 27 mins ago
Value Stream Manager - Mount Clemens Area
The Pivot Group Network
Mount Clemens · Mount Clemens, MI
Are you a forward-thinking professional with a passion for excelling as a value stream manager? The Pivot Group Network, a Michigan manufacturing-focused recruiting group, is committed to…
Added 27 mins ago
Value Stream Manager - Croswell Area
The Pivot Group Network
Croswell · Croswell, MI
Are you a forward-thinking professional with a passion for excelling as a value stream manager? The Pivot Group Network, a Michigan manufacturing-focused recruiting group, is committed to…
Added 28 mins ago
UO
Marketing and Communications Specialist
University of Colorado Denver
Boulder, CO
- $58,200 to $67,500 USD / year
Assist Director of Marketing and Communications in the development and coordination of print communications projects including brochures, event flyers, the admissions viewbook, admitted…
Added 28 mins ago
TT
Manager of Product Management
Tyler Technologies
Lakewood, CO
- $103,000 to $137,816 USD / year
Excellent knowledge and understanding of the full software development lifecycle and associated methodologies helpful.
Added 28 mins ago
Substation Operations Technical Spec II
Dominion Energy
GLEN ALLEN, VA
Responsible for supporting the development, implementation, and maintenance of all various forms of online and offline power equipment testing in Electric Transmission and Distribution…
Added 28 mins ago
C
Care Facilitator
ChenMed
Portsmouth, VA
- $14.3 to $20.42 USD / hour
Performs other duties as assigned and modified at manager’s discretion.
Added 28 mins ago
Senior Dashboard Developer
CACI International
Ashburn, VA
Bachelor's degree + 8 years of experience in related fields, such as software development, dashboard development, full-stack development, front-end development, or business intelligence…
Added 28 mins ago
Infrastructure Delivery Manager, Infrastructure Delivery
Amazon
Herndon, VA
The mission of the team is to deliver network capacity on time with zero rework. The Infrastructure Delivery Manager will manage the implementation and delivery of inbound capacity and…
Added 28 mins ago
C
Front Desk Team Member
ChenMed
Virginia Beach, VA
- $14.3 to $20.42 USD / hour
Performs other duties as assigned and modified at manager’s discretion.
Added 28 mins ago
C
Medical Assistant
ChenMed
Richmond, VA
- $17 to $24.26 USD / hour
Performs other duties as assigned and modified at manager’s discretion.
Added 28 mins ago
Project Manager
Bay Metals & Fabrication, LLC
Chesapeake, VA
Bay Metals & Fabrication (BMF) is seeking an experienced Project Manager – Naval Ship Repair to lead complex ship repair projects from planning through final closeout.
Added 28 mins ago
Cloud Solutions Engineer
Office of the Director of National Intelligence
McLean, VA
…infrastructure for IC OIG systems, including case management software and mission-critical applications hosted in cloud environments. Design and implement cloud security controls, including…
Added 29 mins ago
Value Stream Manager - Dearborn Area
The Pivot Group Network
Dearborn · Dearborn, MI
Are you a skilled professional with a passion for excelling as a value stream manager? The Pivot Group Network, a Michigan manufacturing-focused recruiting group, is dedicated to building…
Added 37 mins ago
Value Stream Manager - Sault Ste. Marie Area
The Pivot Group Network
Sault Ste. Marie · Sault Ste. Marie, MI
Are you a detail-oriented professional with a passion for excelling as a value stream manager? The Pivot Group Network, a Michigan manufacturing-focused recruiting group, is dedicated to…
Added 39 mins ago
Value Stream Manager - Iron River Area
The Pivot Group Network
Iron River · Iron River, MI
Are you a dedicated professional with a passion for excelling as a value stream manager? The Pivot Group Network, a Michigan manufacturing-focused recruiting group, is committed to…
Added 39 mins ago
Value Stream Manager - Escanaba Area
The Pivot Group Network
Escanaba · Escanaba, MI
Are you a forward-thinking professional with a passion for excelling as a value stream manager? The Pivot Group Network, a Michigan manufacturing-focused recruiting group, is committed to…
Added 45 mins ago
Federal Business Development Representative
GovSignals
Washington, DC
We're hiring a Federal Business Development Representative to expand our federal team. You'll work directly with the CEO in our Washington, DC office and own the full sales cycle, carrying…
Added 54 mins ago
MO
Key carrier
Marshalls of MA
Hyattsville, MD
- $17.75 to $18.25 USD / hour
…embraces diversity, fosters collaboration, and prioritizes your development. Whether you’re working in our four global Home Offices, Distribution Centers or Retail Stores - TJ Maxx,…
Added 58 mins ago
Electrical Systems and Controls Engineer - Remington
The Kinetic Group Operations LLC
Lonoke, AR
Added 58 mins ago
Project Manager - Multifamily Development
CLMI Group, LLC
Los Angeles, CA
The Project Manager – Multifamily Development (Design & Construction) is responsible for leading the design and construction delivery of assigned multifamily residential projects from…

Closed listing

Amazon

Senior Applied Scientist, Leo Space Security

Arlington, VA, United States
Herndon, VA, United States

This opening has closed.

The original listing is kept below for reference.

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Job details

Posting language: English
Posted: Nov 5, 2026

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Original job description

Archived listing. The details below describe a past opening.

Description

Amazon Leo is a constellation of Low Earth Orbit satellites that will provide low-latency, high-speed broadband network connectivity to unserved and underserved communities around the world.

We are looking for an Applied Scientist to be a founding scientist on the Engineering and R&D team within Leo Infrastructure and IP Security. The team defends the manufacturing lines, launch sites, and global ground infrastructure behind the constellation from the most sophisticated threat actors on the planet. These requirements create open scientific problems at the intersection of agentic AI, real-time stream processing, graph-based reasoning, and behavioral analytics. You will build the science behind a neurosymbolic reasoning platform and the models that detect the behavior of sophisticated threat actors. This is an R&D role with a production mandate, where you define the problem rather than solve a pre-scoped one, and every model, detection, and agent workflow you build becomes the system Leo's security teams use to protect the constellation.

#### Export Control Requirement

Due to applicable export control laws and regulations, candidates must be a U.S. citizen.

Key job responsibilities

Design and implement scalable, production-grade neurosymbolic systems that integrate symbolic reasoning over graph-based knowledge representations with LLM agents to deliver reliable, verifiable security outcomes.
Design and run reinforcement learning and fine-tuning pipelines (GRPO, PPO, DPO) to optimize language models for security reasoning, triage, and detection-authoring tasks.
Build behavioral and statistical models that detect threat actor behavior, and design the evaluation frameworks that measure model performance against that behavior before trusting a model in production.
Design and build multi-agent systems that autonomously triage, enrich, and contain security events, including the constrained reasoning, safety guardrails, and validation mechanisms that make automated decisions trustworthy at scale.
Own the end-to-end science lifecycle, from research and experimentation through production deployment, defining the metrics that measure system performance and real-world security impact.
Advance the state of the art through publications at top-tier venues, patents, or open-source contributions, and shape the scientific agenda and research culture from day one.

A day in the life

You will move between research and production in the same week: framing an ambiguous security problem as a scientific question, prototyping an approach, and partnering with software engineers to ship it as a capability the platform runs continuously. Security engineers on your team translate threat intelligence into the adversary behaviors that matter; you build the models that detect those behaviors and evaluate model performance against them. You will obsess over the two latencies that define the platforms, the time from event to detection and the time from detection to containment action, and design agents and detections that drive both down. You will backtest candidate detections against retained telemetry, review evaluation results before a model or agent capability graduates to automated execution, and deliver scientific artifacts that ship.

About the team

Leo Infrastructure and IP Security protects the people, facilities, hardware, and supply chain behind a global satellite constellation. The Engineering and R&D team within this organization builds the platforms and tooling the security pillar teams operate on, moving security operations from manual triage to correlation-based detection, automated response, and agentic AI. The team is composed of applied scientists, software engineers, and security engineers working across physical and digital security domains.

#### Inclusive Team Culture

In Amazon Security, it's in our nature to learn and be curious. Ongoing DEI events and learning experiences inspire us to continue learning and to embrace our uniqueness. Addressing the toughest security challenges requires that we seek out and celebrate a diversity of ideas, perspectives, and voices.

#### Training & Career Growth

We're continuously raising our performance bar as we strive to become Earth's Best Employer. That's why you'll find endless knowledge-sharing, training, and other career-advancing resources here to help you develop into a better-rounded professional.

#### Work/Life Balance

We value work-life harmony. Achieving success at work should never come at the expense of sacrifices at home, which is why flexible work hours and arrangements are part of our culture. When we feel supported in the workplace and at home, there's nothing we can't achieve.

Basic Qualifications

3+ years of building machine learning models for business application experience
PhD, or Master's degree and 6+ years of applied research experience
Experience programming in Java, C++, Python or related language
Experience with neural deep learning methods and machine learning

•

Experience with graph algorithms, knowledge graphs, unsupervised learning (clustering, dimensionality reduction, anomaly detection), NLP, and embedding-based retrieval

•

Experience designing evaluation frameworks for AI systems where ground truth requires human judgment, including staged rollouts, A/B testing, and expert feedback loops

Preferred Qualifications

Experience with modeling tools such as R, scikit-learn, Spark MLLib, MxNet, Tensorflow, numpy, scipy etc.
Experience in building quantitative solutions as a scientist or science manager
Experience in one or more of the following domains: access- control system and methodology, network security, application- and system-development security, security architecture and models, cryptography, and operations security

•

Experience with terabyte-scale stream processing and real-time correlation of heterogeneous event sources

•

Experience with cost and latency optimization for LLM-based systems (token reduction, schema optimization, deterministic offloading)

•

Publications in applied ML, graph analytics, agentic AI, or security analytics

Amazon is an equal opportunity employer and does not discriminate on the basis of protected veteran status, disability, or other legally protected status.

Our inclusive culture empowers Amazonians to deliver the best results for our customers. If you have a disability and need a workplace accommodation or adjustment during the application and hiring process, including support for the interview or onboarding process, please visit https://amazon.jobs/content/en/how-we-hire/accommodations for more information. If the country/region you’re applying in isn’t listed, please contact your Recruiting Partner.

The base salary range for this position is listed below. Your Amazon package will include sign-on payments and restricted stock units (RSUs). Final compensation will be determined based on factors including experience, qualifications, and location. Amazon also offers comprehensive benefits including health insurance (medical, dental, vision, prescription, Basic Life & AD&D insurance and option for Supplemental life plans, EAP, Mental Health Support, Medical Advice Line, Flexible Spending Accounts, Adoption and Surrogacy Reimbursement coverage), 401(k) matching, paid time off, and parental leave. Learn more about our benefits at https://amazon.jobs/en/benefits .

USA, VA, Arlington - 167,100.00 - 226,100.00 USD annually

USA, VA, Herndon - 167,100.00 - 226,100.00 USD annually

USA, WA, BELLEVUE - 167,100.00 - 226,100.00 USD annually

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