{"id":2970156,"url":"https://alion.io/job/caci-international-principal-aiml-engineer-large-language-model-2","title":"Principal AI/ML Engineer (Large Language Model)","company":{"id":58481,"name":"CACI International","domain":"caci.com","url":"https://alion.io/company/caci-international","size_band":"5000+","is_staffing_agency":false,"employer_type":"services","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"D","score":47,"open_postings":369,"ghost_share":0.626,"stale_share":0.16,"repost_share":0.745,"time_to_fill_p50_days":48,"computed_at":"2026-11-05T05:54:30Z"}},"role":"AI/ML","role_family":"AI/ML","seniority":"lead","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Aurora, United States","Philadelphia, United 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will support the development of AI/ML algorithms in a multitude of disciplines from object detection/classification, natural language processing, reinforcement learning, and large language models.\nResponsibilities:\nLead and mentor a multidisciplined team consisting of developers and researchers to implement machine learning algorithms to solve a broad set of challenges for our various customers\nApply Large Language Models (LLMs) to a variety of applications within remote sensing such as tasking collections, identifying gaps in collection plans, analyzing patterns of life, and more.\nFine tune foundation models and building adaptors for new applications (llama factory, PEFT)\nApply retrieval augmented generation (RAG) techniques to data to populate and query vector databases (e.g. Weaviate)\nBuild custom applications with LLM frameworks such as LangChain, DSPy\nDeploy LLM solutions across cloud-based and local resources using kubernetes (llama.ccp, vllm etc)\nAnalyze large multi-domain datasets such as images, text and/or graph data, to identify statistically relevant features to build models that provide analysts with actionable data\nReview relevant publications to understand and apply cutting edge concepts to defense and commercial applications\nInterface with both internal and external leadership to communicate technical status\n Qualifications:\nRequired:\nActive TS/SCI with Adjudicated Polygraph\nBS in machine learning, computer science, mathematics, or related fields.\n10+ years of experience, preferably in software development or as a data scientist with 2+ years of building LLM applications using some of the following:Fine-tuning foundational modelsSteering Techniques (e.g Sparse auto encoders, representation tuning)\nBuilding adapters to use foundational models (e.g. PEFT, llama factory)\n\nPrompt engineering techniques / Inference time techniques (e.g. chain of thought, tree of thoughts, etc.)\nUsing Retrieval Augmented Generation techniques to populate and query vector databases (e.g. Weaviate, pinecone)\nUsing LLM Frameworks (e.g. LangChain, DSPy)\nUsing AI APIs ( e.g AWS Bedrock, OpenAI)\nUsing LLM deployment frameworks (eg llama.cpp, vllm, tgi)\nDeveloping UIs with ReAct\n\nExperience leading an interdisciplinary team of researchers and software developers and working with a program manager to define project scope and schedule to ensure we meet project milestones as defined by our customers\nExperience with Python and data science / machine learning libraries (e.g. PyTorch, TensorFlow, Keras, OpenCV, NumPy, Pandas, Polars, scikit-learn, etc.\nDesired:\nMS or PhD in machine learning, computer science, mathematics, or related fields.\nExperience leading an interdisciplinary team of researchers and software developers\nExperience with any of the following Computer Vision domains:Large Language Models and experience identifying ways to incorporate them into new areas and applications\nApplying Transformer-based architectures to domains in other areas outside of Natural Language Processing (NLP) such as computer vision\nObject detection algorithms such as YOLO and Faster-RCNN\nNatural Language Processing algorithms such as BERT\nGenerative Adversarial Networks and Variational Autoencoders\nReinforcement learning and familiarity with Gymnasium Gym, RLlib, and Stable Baselines\nApplying clustering algorithms and/or deep neural networks to real life problems\nImplementing tracking and pattern-of-life algorithms\n\nExperience with Machine Learning libraries and frameworks such as HuggingFace and LangChain\nExperience with Computer Vision libraries such as OpenCV, Nerfstudio, FiftyOne, etc.\nExperience with Linux\nFamiliarity with using AWS cloud computing resources such as EC2, S3, Lambda, etc.\nExperience with any of the following additional languages: Java, C++, Rust, Go, and/or C#\nExperience implementing algorithms on the GPU in Python or C++ using CUDA and other CUDA libraries\nExperience with implementing tracking and pattern-of-life algorithms\nExperience in application deployment, virtualization, and containerization (e.g. Podman, Docker, Kubernetes, Rancher)\nExperience working with various Remote Sensing datasets (e.g. EO/OPIR/SAR images, passive RF, etc.)\nExperience shaping and writing proposals\n-What You Can Expect:\nA culture of integrity.\nAt CACI, we place character and innovation at the center of everything we do. As a valued team member, you’ll be part of a high-performing group dedicated to our customer’s missions and driven by a higher purpose - to ensure the safety of our nation.\nAn environment of trust.\nCACI values the unique contributions that every employee brings to our company and our customers - every day. You’ll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.\nA focus on continuous growth.\nTogether, we will advance our nation's most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground - in your career and in our legacy.\nPay Range:\nThere are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI, you will receive comprehensive benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits.\nSince this position can be worked in more than one location, the range shown is the national average for the position.\nThe proposed salary range for this position is:\n$114,600-$252,100CACI is an Equal Opportunity Employer.All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any other protected characteristic.","description_format":"text","description_chars":6637,"description_truncated":false,"requirements":{"experience_years_min":10,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":true,"languages":[]},"benefits":["Flexible time off"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Cybersecurity","Data & Analytics","Military","National Security"],"lifecycle":[{"event":"open","at":"2026-10-21T01:56:09Z"}],"visa":[],"liveness":{"score":26,"band":"fade","label":"Fading","p_open":1,"p_active":0.6,"p_room":0.44,"age_days":71,"expected_fill_days":48,"reasons":["conf:2","stale_co","urgency","velocity","win:tail","crowd:brand"],"computed_at":"2026-11-05T05:54:30Z"},"pay":{"stated_usd_annual":252100,"is_top_pay":true},"html_url":"https://alion.io/job/caci-international-principal-aiml-engineer-large-language-model-2","json_url":"https://alion.io/job/caci-international-principal-aiml-engineer-large-language-model-2.json","meta":{"generated_at":"2026-11-05T08:19:51Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":10678,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-06T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":58481},"rest":"https://alion.io/mcp/rest/get_company?id=58481"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fcaci-international-principal-aiml-engineer-large-language-model-2"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fcaci-international-principal-aiml-engineer-large-language-model-2"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fcaci-international-principal-aiml-engineer-large-language-model-2"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/caci-international-principal-aiml-engineer-large-language-model-2\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fcaci-international-principal-aiml-engineer-large-language-model-2"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":2970156}},{"tool":"search_jobs","arguments":{"company":"caci.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":2970156},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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