Principal AI Scientist, Frontier Models & Security Lab
Amazon Inc.
Amazon Web Services, Inc. is seeking a Principal Applied Scientist for the Mission AI Lab in Arlington, VA. You will tackle frontier-model challenges, design evaluation frameworks, and build scalable data pipelines, collaborating with engineers, analysts, and operators to push state-of-the-art AI capabilities for national security applications. You will lead hands-on research on training and evaluating models, explain limitations to stakeholders, and mentor junior scientists while operating in a #J-18808-Ljbffr Amazon Inc.
$198.9k - $269k
...Principal Applied Scientist, Mission AI Lab, AWS Region Services Job ID: 10584472 | Amazon Web Services... ...Some of the hardest problems in security are waiting on models that do not exist yet. As a... ...Own the end-to-end adaptation of frontier models for complex reasoning tasks...PrincipalFlexible hoursShift workNight shiftDay shift$77.6k - $176k
Frontier AI Research EngineerThe Opportunity:Frontier Research operates at the edge of what’s... ...excellence across prototypes, and serves as the lab’s senior-most hands-on engineering... ...AI infrastructure, MLOps, or large-scale model deploymentExperience as a thought leader...SuggestedFull timeContract workPart timeLocal areaRemote work$175.88k - $251.25k
...agile, efficient, resilient, and secure. The Zscaler Zero Trust... ...the future of work is Human + AI and are building an AI-native... ...Zscaler is seeking an experienced Principal AI Security Specialist to bridge... ...knowledge of Large Language Models (LLMs), retrieval-augmented...PrincipalFull timeWork at officeLocal areaRemote work$176.1k - $238.2k
...with emerging technologies like AI/machine learning including... ...our fast growing AWS National Security Emerging Technology team to support... ...generative AI, foundation models, and associated AWS services —... ...core focus on generative AI, frontier AI, ML at the edge, quantum, mission...PrincipalWork experience placementFlexible hoursDay shift- ...Obtain Public TrustWhat You Will Do:Our consultants on the AI and Data Defense and Security team help clients maximize the value of their data and... ...Develop Generative AI (GenAI) solutions using large language models (LLMs), retrieval augmented generation (RAG), semantic...SuggestedFull timeFlexible hours
$77.6k - $176k
AI and ML Data ScientistThe Opportunity: As an Agentic AI Engineer and Data Scientist for military intelligence, you’re excited by the opportunity... ...created by large language models (LLMs), machine learning (ML... ...mission-critical national security challenges.In today’s contested...Full timeContract workPart timeWork at officeLocal areaRemote work$266.72k - $350.07k
...About this team The Enterprise Data & AI organization is a strategic and... ...efficiency. Core responsibilities As a Principal Applied AI/ML Scientist, you define and drive the solutions... ...-scale optimization and predictive modeling challenges. Examples of work...PrincipalPermanent employmentFull timeWork visa$220k - $350k
...enabling human life on Mars.PRINCIPAL AI ENGINEER, SPECIAL PROGRAMSThis... ...and deploying AI capabilities (models, APIs, tools, and... ...optimize integrations between AI frontier models (e.g., Grok family) and... ...and maintaining a Top Secret Security Clearance as a condition of employment...PrincipalPermanent employmentTemporary workLocal areaImmediate startWeekend work- ...The Senior Principal Full Stack AI Engineer serves as a senior, hands-on full... ...to ensure interoperability, security, and long-term sustainability... ..., including large language models (LLMs) and foundation... ...Vertex AI) and integrating frontier models such as GPT, Claude,...PrincipalFull time
$161.8k - $184.6k
...Overview Principal Data Scientist - AI Foundations, Specialist Models Data is at the center of everything we do. As a startup, we disrupted the credit card industry by individually personalizing every credit card offer using statistical modeling and the relational...PrincipalFull timePart timeLocal areaFlexible hours- ...is where your skills strengthen national security, cybersecurity, health, transportation,... ...applicants for a Computational Finance (CompFi) Scientist to join our Financial Innovation... ...Complex Systems Department (L644) in the Modeling and Analysis Technical Division. In...PrincipalWork experience placementInternshipLocal area
- ...on Defense and National Security mission sets. We leverage... ...innovation. Our teams are at the frontier of the Nation's most... ...-level decision-support modeling. This role serves as a principal technical advisor,... ...machine learning, NLP, and AI methodologies to streamline...For contractors
$116.35k - $210.33k
...has a new and exciting opportunity for a Principal Systems Administrator in our Intel... ...Our talented team is at the forefront in Security Engineering, Computer Network Operations... ...Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic...PrincipalFull timeImmediate startFlexible hours$200k
Falls Technology is seeking a Data Scientist / Data Modeler (ECL/HPCC) to support a federal national-security mission. This is an onsite role in McLean, VA , focused on designing data models and building high-volume ECL data processing on HPCC Systems clusters, with work...Full time- ...6Date Posted: 10/02/2026Position Title/Short DescriptionTitle: Principal Quantitative ModelerSection: Full-Time NonacademicLocation: McLean... ...- Default: Any FieldFull Text of JOE Listing:As a Quantitative Modeler at Capital One, you’ll be part of a team that’s leading the...PrincipalFull time
$175k - $225k
...solutions to complex national security issues. With over 50 years of... ...have an immediate need for a Principal Technical Advisor to provide onsite... ...while designing and applying AI-enabled approaches that... ...AI platforms, large language models, retrieval-augmented workflows...PrincipalFull timeWork at officeImmediate startFlexible hours- ...is where your skills strengthen national security, cybersecurity, health, transportation,... ...and Operations Department is seeking a Principal Space Systems of Systems Engineer to support... ...using one or more architecture, modeling, or digital engineering frameworks and methods...PrincipalInternshipLocal area
- ...research on planetary radiation belts and contribute to national security applications. The role requires a PhD in Physics and at least 5... ...welcoming atmosphere and generous benefits are offered at this leading research lab. #J-18808-Ljbffr Johns Hopkins Applied Physics Lab
- ...learning spaces to research labs and civic landmarks and infrastructure... ...of a Federal Architecture Principal with a Science focus to join... ...as part of the local team, securing successful CPARS.In the role... ...through HDR’s 100% energy modeling initiative.Perform other duties...PrincipalContract workWork at officeLocal area
- Iridium Communications Inc is seeking a Principal Security Engineer to join at the earliest stage of a new security service. You will apply... ...engineering. This role leads red‑team style assessments, threat modeling, and collaboration with product and partner teams to embed...
- ...Financial Analyst Principal Support mission-critical initiatives and... ...able to ensure the safety and security of our nation. At GDIT, people... ...Develop long-range financial models in collaboration with the management... ...of everything we do. Growth: AI-powered career tool that...PrincipalContract workWork at office3 days per week
- Medallia, Inc. is seeking a Senior Staff Product Security Engineer to lead security strategy for AI-powered products and agentic systems. You will partner... ...platforms. The role requires deep expertise in threat modeling, security architecture, and AI security, with focus...
$220k - $260k
STR in Arlington, Virginia is seeking a Principal Defense Systems Analyst to lead research and development... ...performance and survivability of national security systems. Candidates should have 8-10+ years of experience in modeling & simulation and possess a Top Secret...$116.35k - $210.33k
...has a new and exciting opportunity for a Principal Systems Administrator in our Intel... ...Our talented team is at the forefront in Security Engineering, Computer Network Operations... ...Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic...PrincipalFull timeImmediate startRemote workFlexible hours$140k - $190k
...problems related to national security. Our team consists of... ...As a Senior Data Scientist , you will help research... ...integrate cutting-edge models and technologies into... ...statistical methods to frontier language models. In addition... ..., and apply novel AI/ML models to automatically...Full timeLocal areaNight shift$230k - $280k
...challenging problems related to national security. Our team consists of passionate and... ...around the globe. The Role: As a Principal Network Systems Researcher, you will utilize... ...communications theory per the OSI stack model ~ Working knowledge of unsupervised and...PrincipalFull timeLocal areaNight shift$164.5k - $213.5k
...fusion, artificial intelligence (AI), machine learning (ML), and... ...in defense, aerospace, security, and related fields all work... ...OverviewQinetiQ US is looking for a Principal Optical Engineer experienced... ...of objectsDesigning and modeling lenses and other optical components...PrincipalWork experience placementNight shift$116.35k - $210.33k
...has a new and exciting opportunity for a Principal Network Engineer in our Intel Sector's (... ...talented team is at the forefront in Security Engineering, Computer Network Operations... ...Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic...PrincipalFull timeImmediate startFlexible hours$180k - $200k
...structured finance professionals rely on to understand risk, run models, and make decisions with confidence. Our platform, Edge, serves... ...directly with our structured finance and risk teams. This is a principal-level role for someone who has done this work before and is...PrincipalShift work- ...improves lives. This is where your skills strengthen national security, cybersecurity, health, transportation, and citizen services. We... ...analysis, portfolio investment analysis, economic analysis and modeling, research, business case analysis, modeling and simulation, advanced...PrincipalWork experience placementInternshipLocal area
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