{"id":2973174,"url":"https://alion.io/job/microsoft-principal-applied-scientist-9","title":"Principal Applied Scientist","company":{"id":18,"name":"Microsoft","domain":"microsoft.com","url":"https://alion.io/company/microsoft","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Eightfold","truth_index":{"grade":"B","score":79,"open_postings":279,"ghost_share":0,"stale_share":0.832,"repost_share":0,"time_to_fill_p50_days":28,"computed_at":"2026-10-22T06:10:10Z"}},"role":"AI/ML","role_family":"AI/ML","seniority":"lead","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Washington, United States","Boston, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":142800,"max":274800,"currency":"USD","period":"year","gross":null,"usd_annual":274800},"salary_estimate":null,"experience_years_min":9,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"Azure","optional":false},{"name":"Copilot","optional":false},{"name":"Machine Learning","optional":false},{"name":"Recommender Systems","optional":false}],"status":"live","first_seen_at":"2026-09-01T17:20:01Z","employer_posted_date":"2026-09-09","last_verified_at":"2026-10-22T20:23:39Z","board_verified":true,"closed_at":null,"days_open":51,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":51},"description":"OverviewThe Microsoft 365 Copilot Reasoning Science team is looking for a Principal Applied Scientist to help shape the future of enterprise productivity by building reliable, long-horizon agentic capabilities for M365 Copilot Chat. In this role, you’ll advance the state of the art in frontier-model harness engineering and evaluation, tackling the challenges required for AI agents to reliably plan, reason, and execute complex, multi-step tasks on behalf of millions of users.\nThe ideal candidate is a self-starter who thrives in a fast-paced, high-visibility environment, and is passionate about being data-driven, iteration speed, scale, and engineering culture. You will be presented with opportunities to have great impact, work with frontier models, and collaborate closely with teams across the company, including Microsoft Research, Azure, and MAI.\nThe team is part of CACore (Copilot and Agents Core Platform), an organization that brings together talent in the areas of LLMs (Large Language Models), recommender systems, machine learning, information retrieval, agentic engineering, and responsible AI. This role is flexible in that you will be able to partner with your manager to define the way that you’d like to work, whether in the office or from home.\nMicrosoft’s mission is to empower every person and every organization on the planet to achieve more. As employees we come together with a growth mindset, innovate to empower others, and collaborate to realize our shared goals. Each day we build on our values of respect, integrity, and accountability to create a culture of inclusion where everyone can thrive at work and beyond.\nResponsibilities\nDefining and managing experiments from inception to shipment, creating the requisite metrics, ML pipelines, algorithms. Owning problems end-to-end and being willing to pick up whatever knowledge you’re missing to get the job done.\n\nDefining rigorous evaluation methodologies, offline benchmarks, online experimentation frameworks and data-driven approaches for measuring model and product performance.\n\nInfluencing senior leadership and partner teams through quality written and oral summaries of work in progress and experimentation results.\n\nBuilding tools to accelerate your own (and your teammates’) workflows, but only when off-the-shelf solutions won’t do.\n\nContributing to strategic planning and long-term technical roadmaps, incorporating latest research to meet business goals.\n\nContributing to the growth and development of the team’s engineers and applied scientists. Identifying new research talent to join Microsoft and collaborating with the academic community to develop the recruiting pipeline.\n\nSupporting and developing a thriving applied science culture within CASQ to encourage experimentation, scientific process, and innovation.\n\nQualifications\nRequired Qualifications:\n Bachelor's Degree in Statistics, Econometrics, Computer Science, Electrical or Computer Engineering, or related field AND 6+ years related experience (e.g., statistics, predictive analytics, research)OR Master's Degree in Statistics, Econometrics, Computer Science, Electrical or Computer Engineering, or related field AND 4+ years related experience (e.g., statistics, predictive analytics, research)\nOR Doctorate in Statistics, Econometrics, Computer Science, Electrical or Computer Engineering, or related field AND 3+ years related experience (e.g., statistics, predictive analytics, research)\nOR equivalent experience. \n\nMicrosoft Cloud Background Check: This position will be required to pass the Microsoft Cloud background check upon hire/transfer and every two years thereafter.\nPreferred Qualifications:\nProficiency in agentic engineering.\nMaster's Degree in Statistics, Econometrics, Computer Science, Electrical or Computer Engineering, or related field AND 9+ years related experience (e.g., statistics, predictive analytics, research) OR Doctorate in Statistics, Econometrics, Computer Science, Electrical or Computer Engineering, or related field AND 6+ years related experience (e.g., statistics, predictive analytics, research) \nOR equivalent experience. \n\n5+ years experience creating publications (e.g., patents, libraries, peer-reviewed academic papers). \n5+ year(s) building and maintaining production machine learning systems at internet scale. \n3+ year(s) experience in working with multidisciplinary, geo-distributed team. \nDemonstrated experience owning end-to-end machine learning and software projects, including gathering requirements and feedback, collaborating with cross-functional stakeholders, producing technical designs, shipping to production, and iterating on systems post-launch. \nAbility to thrive in dynamic environments, especially where priorities may shift and project definitions evolve. \nAdvanced expertise in agentic engineering. \nApplied Sciences IC5 - The typical base pay range for this role across the U.S. is USD $142,800 - $274,800 per year. There is a different range applicable to specific work locations, within the San Francisco Bay area and New York City metropolitan area, and the base pay range for this role in those locations is USD $188,000 - $304,200 per year.\nCertain roles may be eligible for benefits and other compensation. Find additional benefits and pay information here:\nhttps://careers.microsoft.com/us/en/us-corporate-pay\nThis position will be open for a minimum of 5 days, with applications accepted on an ongoing basis until the position is filled.\nMicrosoft is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to age, ancestry, citizenship, color, family or medical care leave, gender identity or expression, genetic information, immigration status, marital status, medical condition, national origin, physical or mental disability, political affiliation, protected veteran or military status, race, ethnicity, religion, sex (including pregnancy), sexual orientation, or any other characteristic protected by applicable local laws, regulations and ordinances. If you need assistance with religious accommodations and/or a reasonable accommodation due to a disability during the application process, read more about requesting accommodations.","description_format":"text","description_chars":6240,"description_truncated":false,"requirements":{"experience_years_min":9,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Console Games","Cloud Platforms (IaaS & PaaS)","Gaming Consoles","Developer Tools"],"lifecycle":[{"event":"open","at":"2026-10-21T03:19:49Z"}],"visa":[],"liveness":{"score":11,"band":"cold","label":"Long shot","p_open":1,"p_active":0.306,"p_room":0.36,"age_days":50,"expected_fill_days":28,"reasons":["conf:1","stale_co","evergreen","wave","velocity","win:tail","crowd:brand"],"computed_at":"2026-10-22T06:10:10Z"},"pay":{"stated_usd_annual":274800,"is_top_pay":true},"html_url":"https://alion.io/job/microsoft-principal-applied-scientist-9","json_url":"https://alion.io/job/microsoft-principal-applied-scientist-9.json","meta":{"generated_at":"2026-10-22T20:33:27Z","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":4623,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-23T00:00:00Z"}},"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":18},"rest":"https://alion.io/mcp/rest/get_company?id=18"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fmicrosoft-principal-applied-scientist-9"},{"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%2Fmicrosoft-principal-applied-scientist-9"},{"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%2Fmicrosoft-principal-applied-scientist-9"},{"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/microsoft-principal-applied-scientist-9\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fmicrosoft-principal-applied-scientist-9"}]}