{"id":2829518,"url":"https://alion.io/job/atkinsrealis-specialist-reactor-physicist","title":"Specialist Reactor Physicist","company":{"id":8926,"name":"AtkinsRéalis","domain":"atkinsrealis.com","url":"https://alion.io/company/atkinsrealis","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"A","score":86,"open_postings":413,"ghost_share":0.002,"stale_share":0.559,"repost_share":0.005,"time_to_fill_p50_days":43,"computed_at":"2026-10-23T05:54:15Z"}},"role":"Energy","role_family":"Energy","seniority":"staff","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Kincardine, Canada"],"countries":["CA"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":63000,"max_usd":157000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":263},"experience_years_min":15,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Fortran","optional":false},{"name":"MCNP","optional":false},{"name":"C++","optional":true},{"name":"MATLAB","optional":true},{"name":"Python","optional":true},{"name":"Windows","optional":true}],"status":"live","first_seen_at":"2026-04-27T00:00:00Z","employer_posted_date":"2026-04-27","last_verified_at":"2026-10-21T23:56:26Z","board_verified":true,"closed_at":null,"days_open":179,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":179},"description":"Job Description\nOverview\nWe are currently looking for a Specialist Reactor Physicist to be part of our teamin the Fuel and Physics department supporting the design of new nuclear power plants and the operation, refurbishment, or waste management and decommissioning of existing CANDU nuclear power plants.\nPlease note that this job posting is intended for you to express your interest in future opportunities within AtkinsRéalis\nYour role\nPerform and/or supervise the following calculations: Finite-reactor-core calculations, Kinetics calculations, Transport calculations, Advanced-fuel-cycle calculations, Monte Carlo calculations.\n\nPrepare inputs, run reactor physics computer codes.\n\nDevelop, adapt and modify FORTRAN computer codes as required for specific applications (e.g., to implement new methods or perform new types of calculations for both diffusion and transport calculations).\n\nDevelop codes and methodologies and perform reactor physics analyses to support design and commercial activities.\n\nDocument analyses in technical notes and reports, and present results at meetings.\n\nInterface with other groups/projects as required.\n\nReview technical documents.\n\nSupervise, train and prepare training material for junior staff.\n\nEstimate, monitor schedules and assign work to meet completion dates.\n\nInterface with clients and projects to assess reactor physics related issues confronting their projects/stations and advising on potential solutions.\n\nPrepare and/or review work proposals for internal and external clients.\n\nPerform varied work assignments effectively and respond quickly to changing project needs.\n\nEstablish required resources for client work.\n\nPropose/develop methodologies and approaches to be used in reactor physics tasks.\n\nDevelop analysis basis plans.\n\nLead work and liaise with a multidisciplinary analysis team including project management.\n\nAbout you\nMaster’s or Ph.D. degree or equivalent in Nuclear Engineering, or Science, from a university of recognized standing\n\n15+ years of relevant experience or 10 years of experience with an advanced degree.\n\nExtensive experience with reactor physics codes WIMS, DRAGON, RFSP and MCNP. Experience with DONJON and KENO computer codes.\n\nExperience with nuclear data library creation\n\nExperience with few energy group constants\n\nKnowledge of light water reactors, and small modular reactors is desirable\n\nMust be conversant with computer environments.\n\nProficiency in both Linux and WINDOWS environments.\n\nAbility to program especially in python, MATLAB, C++, or Fortran and familiarity with the Linux and Windows operating system.\n\nReward & benefits\nExplore the rewards and benefits that help you thrive - at every stage of your life and your career at AtkinsRéalis in Canada.\nEnjoy competitive compensation, employee recognition, and a brilliant range of flexible benefits you can tailor to your health, wellbeing, financial and lifestyle needs.\nMake the most of diverse opportunities for training and professional development to grow your skills and expertise.\nAnd take advantage of our hybrid working culture and generous time-off policies to balance a fulfilling career with your personal life.\nBe rewarded. Find out more.\nAbout AtkinsRéalis\nWe're AtkinsRéalis, a world-class engineering services and nuclear organization. We connect people, data and technology to transform the world's infrastructure and energy systems. Together, with our industry partners and clients, and our global team of consultants, designers, engineers and project managers, we can change the world. We're committed to leading our clients across our various end markets to engineer a better future for our planet and its people.\nFind out more.\nAdditional information\nAtkinsRéalis cares about your privacy. AtkinsRéalis and other subsidiary or affiliated companies of AtkinsRéalis (referred to throughout as “AtkinsRéalis”) are committed to protecting your privacy. Please consult our Privacy Notice on our Careers site to know more about how we collect, use, and transfer your Personal Data.\nBy submitting your personal information to AtkinsRéalis, you confirm that you have read and accept our Privacy Notice.\nAppropriate accommodation will be provided upon request throughout the recruitment and hiring process as required by Company policy and the Accessibility for Ontarians with Disabilities Act (AODA).\nSuccessful applicants will be notified about AtkinsRéalis’ accommodation policies at the time the employment offer is extended, and the information will be shared with new personnel during the onboarding process.\nWorker Type\nEmployeeJob Type\nRegularAt AtkinsRéalis, we seek to hire individuals with diverse characteristics, backgrounds and perspectives. 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