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Added 3 hours ago
CI
Preclinical Principal Scientist, Research & Development
Cresilon, Inc.
Remote, United States
- $130,000 to $210,000 USD / year
The Preclinical Principal Scientist will serve as a key scientific contributor, subject matter expert (SME), and Project Manager in the execution of Cresilon’s Preclinical Research…
Added 3 hours ago
CI
Manager/Principal Scientist Research & Development - Polymer Formulation
Cresilon, Inc.
Brooklyn, NY
- $130,000 to $180,000 USD / year
The R&D Manager/Principal Scientist - Polymer Formulation will lead the design, development, and implementation of novel formulations and polymer materials for use in medical devices,…
Added 7 hours ago
HH
Histology Technologist
HCA Healthcare
Richmond, VA
- $30.27 to $45.42 USD / hour
Prepare and process specimens for gross and microscopic examination and diagnosis by a pathologist, ensuring optimal conditions for analysis.
Added 7 hours ago
Data Scientist
BOOZ, ALLEN & HAMILTON, INC.
Arlington, VA
As a data scientist, you're excited at the prospect of unlocking the secrets held by a data set, and you're fascinated by the possibilities presented by IoT, machine learning, and…
Added 8 hours ago
Senior / Staff Scientist, Assay Automation
Clear Labs
San Carlos, CA
…environments. We will calibrate level during the interview…
Added 8 hours ago
Process Data Scientist
Regeneron Pharmaceuticals, Inc (USA)
United States
…people with serious diseases. We are looking to fill a Data Scientist position to support the Process Controls and Validation group. These teams support the Manufacturing and Regulatory…
Added 9 hours ago
ND
Principal Scientist, Upstream Process Science
NantKwest Dba Immuni
Louisville, CO
- $34,986 USD / year
The Principal Scientist, Upstream Process Sciences role will manage the team responsible for upstream process development, process characterization, and scientific support activities for…
Added 9 hours ago
UO
CIRES / NOAA Chemical Sciences Laboratory, Research Scientist in Atmospheric Che
University of Colorado Denver
Boulder, CO
- $89,500 to $106,000 USD / year
…major component of the position will involve leadership in the development, characterization, deployment, and scientific application of chemical ionization mass spectrometry (CIMS) and…
Added 10 hours ago
Senior Applied Scientist, Leo Space Security
Amazon
Bellevue, WA
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,…
Added 11 hours ago
Clinical Laboratory Scientist - Sharp Memorial - Night Shift - Per Diem
Sharp HealthCare
San Diego, CA
California Clinical Laboratory Scientist (CLS) Generalist license - CA Department of Public Health; Other; California Clinical Toxicologist Scientist License - CA Department of Public…
Added 11 hours ago
UO
Senior Scientist
University of Colorado Denver
Boulder, CO
- $40,000 to $72,000 USD / year
During the application process you will need to enter contact information for a reference who can write a letter of recommendation on your behalf. We will request letters and additional…
Added 14 hours ago
UO
Chair of Pathology
University of Colorado Denver
Aurora, CO
- $400,000 to $499,999 USD / year
This position requires a dynamic, passionate, and experienced physician/scientist leader with a proven track record across the spectrum of individual scholarship, collaborative academic…
Added 15 hours ago
UO
Open Rank Assistant/Associate Professor Orthopedic Oncologist/Surgeon
University of Colorado Denver
Aurora, CO
- $486,895 to $499,999 USD / year
…education program that includes a formal curriculum, a visiting scientist speaker series, an annual symposium, and a weekly grant development meeting for PIs and trainees, and formal…
Added 15 hours ago
UO
COMBAT Open Rank-Research Scientist, Senior Research Scientist
University of Colorado Denver
Aurora, CO
- $90,000 USD / year
Open Rank-Research Scientist, Senior Research Scientist
Added 16 hours ago
UO
Open Rank Regular Faculty: Assistant - Full Professor
University of Colorado Denver
Aurora, CO
- $110,000 to $150,000 USD / year
…in the Department of Ophthalmology include retinal biology, development, human retinal organoids, cell and tissue transplantation, epidemiology, artificial intelligence, and systematic…
Added 19 hours ago
P
Oncology Late Stage Clinical Development Scientist (Non MD)
Pfizer
Jefferson City, MO
- $176,600 to $294,300 USD / year
…enterprise level workgroups aimed at optimizing PFE clinical development procedures; may be a subject matter expert or business process owner for a relevant SOP or…
Added 19 hours ago
Lead Clinical Lab Scientist
Veterans Affairs, Veterans Health Administration
Durham, NC
Added 19 hours ago
Exploitation Specialist / Imagery Scientist, Expert
Avalore, LLC
Springfield, VA
Determine how to pre-process and standardize the data to match existing data standards or to be transformed into a usable state for labeling and model development purposes. This may involve…
Added 19 hours ago
Exploitation Specialist / Data Scientist (Senior)
Avalore, LLC
Springfield, VA
Avalore, LLC is seeking an Exploitation Specialist / Data Scientist, Senior to support Department of War (DoW) customers in Springfield, VA.
Added 19 hours ago
Data Scientist (Exploitation Specialist)
Avalore, LLC
Springfield, VA
We are seeking a talented and motivated Data Scientist to perform advanced data analysis using statistical and quantitative methods, develop impactful visualizations to support…
Added 20 hours ago
Lead Clinical Lab Scientist
Veterans Affairs, Veterans Health Administration
Amarillo, TX
Added 20 hours ago
Medical Laboratory Scientist - CORE (Chemistry) - Evenings
MD Anderson Cancer Center
Houston, TX
You will also contribute to laboratory quality, innovation, and continuous improvement by participating in process improvement initiatives, validating new methodologies, laboratory…
Added 20 hours ago
MA
Senior Medical Laboratory Scientist - CORE (Chemistry) - Part-Time
MD Anderson Cancer Center
Houston, TX
- Part-time
As a Senior Medical Laboratory Scientist, the selected candidate will apply advanced laboratory expertise, support quality and regulatory compliance initiatives, and serve as a resource to…
Added 21 hours ago
O
Data Scientist (Databricks, Mosaic AI)
OpenDataJobs
Remote, United States
- $110,000 to $140,000 USD / year
We solve problems through people, process, and technology, in that order. Technology matters, but people make transformation happen. That principle defines our culture. Trust and motivation…
Added 21 hours ago
Data Scientist
neurohire.ai
Remote, United States
NeuroHire is seeking a motivated and analytical Data Scientist to join our team. In this role, you will work with structured and unstructured datasets to discover meaningful patterns,…

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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