Jobs in the United States

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Added just now
Territory Manager
Jacent
SAN ANTONIO, TX
Manage the hiring process in assigned geography as the Hiring Manager; including but not limited to: reviewing resumes/applications of qualified candidates, conducting in-person and…
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Store Supervisor, FT
Under Armour
North Bend, WA
As a Supervisor, you're a key part of our store leadership - coaching teammates, supporting daily operations, and driving results. You'll back up the Assistant Store Manager, uphold…
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Store Supervisor, FT
Under Armour
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VC
Customer Support Representative
Versatile Credit, Inc.
Chicago Engagement Hub, IL · Charlotte Engagement Hub, NC · Boston Engagement Hub, MA · Atlanta Engagement Hub, GA · Baltimore Engagement Hub, MD
- $24.5 to $32.5 USD / hour
You must have a high school diploma or equivalent · New hires (Level 4-7) must have 9 months of continuous service with the company before they are eligible to post on other roles
Added 1 min ago
Market Development Manager - Healthcare
The ODP Group
Signal Hill, CA
The Market Development Manager is responsible for developing and maintaining go-to-market frameworks that drive consistent, scalable execution across healthcare, partnering closely with…
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Market Development Manager - Healthcare
The ODP Group
Itasca, IL · Chicago, IL
The Market Development Manager is responsible for developing and maintaining go-to-market frameworks that drive consistent, scalable execution across healthcare, partnering closely with…
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Workday Certified Data Lead
Accenture LLP Company
United States
This role requires to be onsite 3 days per week in local office · If Associate’s Degree must have equivalent minimum 6 year of work experience
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Clinical Services Performance Manager
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Support Clinical Services Manager review of patient management files and deliver summaries to pharmacy operations
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Manager Data Engineering
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Experience with enterprise AI platforms, machine learning operations (MLOps), and AI governance practices preferred.
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OPERATIONS MANAGER (EVS) - Rosedale, MD
Compass Group
Rosedale, MD
Summary: As an Operations Manager, you are responsible for assisting in directing and overseeing the support services operational needs of the department. You will coordinate the tasks of…
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CG
HUMAN RESOURCES ASSISTANT (FULL TIME)
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Washington, DC
- $24 USD / hour
- Full-time
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FACILITIES JANITORIAL MANAGER
Compass Group
CHICAGO, IL
Working as the Facilities Manager, you are responsible for assisting with the overall management and operations of the healthcare facility ensuring that services offered to the customers is…
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Campus Executive Chef
Compass Group
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…Executive Chef to lead the culinary vision and day-to-day kitchen operations at Carthage College. This role is responsible for delivering exceptional food experiences while fostering a…
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- $20 to $30 USD / hour
Must have the ability to work overtime in support of the department’s needs
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Assistant Café Manager
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…freshness, and presentation. Working closely alongside the Café Manager, you will oversee the daily operations of the café, with a particular focus on the development, and performance…
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ADMIN SPECIALIST IV
The Aerospace Corporation
El Segundo, CA
We are seeking a driven and confident Senior-level Administrative Partner to work directly with the General Manager. In this pivotal role, you will be a key contributor to the division's…
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Collections, Curatorial, and Exhibitions Assistant
Colby College
United States
- $21 USD / hour
…the position works closely with the Deputy Director, Senior Manager of Collections and Registration, and colleagues across Museum departments to support exhibition planning, collections…
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Wellness & Recovery Specialist - NEW Gym Opening!
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CPR/AED certification required within 30 days of hire
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Service Associate - Night - NEW Gym Opening!
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CPR certification required within 30 days of hire
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Service Associate - NEW Gym Opening!
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CPR certification required within 30 days of hire
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BU FP&A Analyst
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Assist the FP&A Manager with process improvements such as report automation and template standardization.
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Material Handler- Material Kitting
Celgene - Summit (Corp)
Summit West, NJ
- $28.13 to $34.09 USD / hour
Wednesday - Saturday (with e/o Wednesday off), Onsite Day Shift, 11 a.m · Willing to work staggered day shift hours
Added 3 mins ago
Senior Specialist, Business Analyst Global operations (IT)
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As a Senior Specialist in the Cross Study Operations and Specimen Management (CSO & SM) Product Line within Global Development Operations Business Insights & Technology (GDO BI&T), you will…
Added 3 mins ago
Manager, Aviation Security Programs, Office of the Chief Security Officer
The Port Authority of NY & NJ
New York, NY
Under the direction of the Assistant Director, Aviation Security, in the Office of the Chief Security Officer, the Manager of Aviation Security Programs will manage the Central Office…

Amazon

Senior Applied Scientist, Leo Security

Bellevue, WA, United States

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Job details

Posting language: English
Posted: Sep 12, 2026

Original job description

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

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

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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

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

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

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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

Apply on usnlx.com About employer

More about this job

Skills

Research
Supply chain management
Machine learning
Oracle Java
C++
Python
Deep learning
Natural language processing
R
Scikit-learn
Apache Spark
Apache MXNet
TensorFlow
NumPy
SciPy
Control systems
ML
Recruitment
Mental health

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Work requirements

Jobs in the United States