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Added 41 mins ago
Senior Applied Scientist, Leo Space Security
Amazon
Bellevue, WA
Design and run reinforcement learning and fine-tuning pipelines (GRPO, PPO, DPO) to optimize language models for security reasoning, triage, and detection-authoring tasks.
Added 1 hour ago
UO
Associate Director of Marketing & Social Media
University of Colorado Denver
Boulder, CO
- $95,000 to $100,000 USD / year
…The ideal candidate will bring a strong marketing acumen, a digital-first orientation, experience with the creative process, and excellent interpersonal skills. This position reports to the…
Added 1 hour ago
G
Commercial Construction Superintendent
GPAC
Kokomo, IN
- $95,000 to $125,000 USD / year
Partner closely with Project Managers and other team members to ensure successful project execution
Added 2 hours ago
A
Creative Design Summer Analyst – New York – NAELFY27
Accenture
New York City, NY
- $21.39 to $48.13 USD / hour
…intersection of creativity, technology, and business impact. We partner with some of the world's leading thinkers, innovators, and subject matter experts to bring groundbreaking ideas to…
Added 2 hours ago
Engagement Manager (EXL94)
ExlService.com, LLC
NEW YORK, NY
Added 4 hours ago
Head of Program Design
Braven
Remote, United States
…students (e.g., pandemic moment that required more online to a digital learning fatigue moment six years after the pandemic) and/or the labor market (e.g., employers are scaling up…
Added 4 hours ago
Head of Program Design
Braven
Remote, United States
…students (e.g., pandemic moment that required more online to a digital learning fatigue moment six years after the pandemic) and/or the labor market (e.g., employers are scaling up…
Added 4 hours ago
Head of Program Design
Braven
Remote, United States
…students (e.g., pandemic moment that required more online to a digital learning fatigue moment six years after the pandemic) and/or the labor market (e.g., employers are scaling up…
Added 4 hours ago
Head of Program Design
Braven
Remote, United States
…students (e.g., pandemic moment that required more online to a digital learning fatigue moment six years after the pandemic) and/or the labor market (e.g., employers are scaling up…
Added 4 hours ago
Associate Director, Technical Project Management
Braven
Remote, United States
Partner with Digital Product Management on prioritization and roadmap alignment.
Added 4 hours ago
Associate Director, Technical Project Management
Braven
Remote, United States
Partner with Digital Product Management on prioritization and roadmap alignment.
Added 4 hours ago
Associate Director, Technical Project Management
Braven
Remote, United States
Partner with Digital Product Management on prioritization and roadmap alignment.
Added 4 hours ago
Associate Director, Technical Project Management
Braven
Remote, United States
Partner with Digital Product Management on prioritization and roadmap alignment.
Added 4 hours ago
Associate Director, Regional Communications
Braven
Remote, United States
…across the regions in which we operate. This role will also partner closely with colleagues across the organization to make sure communications are aligned and coordinated. As a key member…
Added 4 hours ago
Associate Director, Regional Communications
Braven
Remote, United States
…across the regions in which we operate. This role will also partner closely with colleagues across the organization to make sure communications are aligned and coordinated. As a key member…
Added 4 hours ago
Associate Director, Regional Communications
Braven
Remote, United States
…across the regions in which we operate. This role will also partner closely with colleagues across the organization to make sure communications are aligned and coordinated. As a key member…
Added 4 hours ago
Associate Director, Regional Communications
Braven
Remote, United States
…across the regions in which we operate. This role will also partner closely with colleagues across the organization to make sure communications are aligned and coordinated. As a key member…
Added 4 hours ago
UO
Assistant Director of Visitor Experience
University of Colorado Denver
Boulder, CO
- $70,900 to $74,000 USD / year
Partner with the Office of Admissions to support event logistics for specialized populations and events including Transfer and Top Scholar experiences.
Added 4 hours ago
Inpatient Rehabilitation Facility (IRF) Quality Analyst - Healthcare
EXL Talent Acquisition Team
United States
Added 4 hours ago
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Technical Systems Engineer II (Full-Time) - United States
Cisco
RTP, NC
- Full-time
…software delivery speed and reduce manual engineering effort. Partner closely with application developers to troubleshoot infrastructure issues and improve overall platform reliability.…
Added 4 hours ago
Staff Software Engineer
Cisco Systems, Inc.
Remote, United States
Partner closely with product managers, SREs, and cross-functional teams to deliver meaningful customer outcomes.
Added 4 hours ago
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Advisor, Change Management
BME Strategies
Remote, United States
- $87,360 to $120,640 USD / year
…is too small or big; pursuing the equitable solution; always learning, and; committed to quality at every…
Added 4 hours ago
UO
Marketing Content Strategist
University of Colorado Denver
Boulder, CO
- $72,000 to $80,000 USD / year
…aligns with the college's brand voice and is delivered through digital and print mediums. This role sits at the intersection of content, brand, digital marketing, and communications and…
Added 5 hours ago
W
Group Director, Technical Program Management - Strategic Partnerships - AI Natives
Walmart
SAN BRUNO, CA
- $254,000 to $481,000 USD / year
This leader will own the end-to-end partner relationships across consumer and enterprise use cases, translating frontier AI capabilities into differentiated consumer experiences and…
Added 5 hours ago
W
(USA) Manager, Strategic Account Management
Walmart
BENTONVILLE, AR · SAN BRUNO, CA · HOBOKEN, NJ · BELLEVUE, WA · SUNNYVALE, CA
- $80,000 to $202,000 USD / year
…opportunities and demonstrating adaptability and promoting continuous…

Amazon

Senior Applied Scientist, Leo Space Security

Bellevue, WA, United States

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Job details

Posting language: English
Posted: Nov 5, 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

•

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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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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