{"id":748872,"url":"https://alion.io/job/alvaenergy-senior-nsss-integration-engineer","title":"Senior NSSS Integration Engineer","company":{"id":669625,"name":"Alva Energy","domain":"alvaenergy.io","url":"https://alion.io/company/alvaenergy","size_band":null,"is_staffing_agency":false,"is_intermediary":false,"ats_vendor":"Ashby","truth_index":{"grade":"B","score":75,"open_postings":5,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-09-23T05:45:00Z"}},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":"senior","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"hiring_geo_confidence":"structured","locations":["Cambridge, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":96000,"max_usd":182000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":2148},"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[],"status":"live","first_seen_at":"2026-06-26T14:33:01Z","employer_posted_date":"2026-06-26","last_verified_at":"2026-09-23T19:01:40Z","board_verified":true,"closed_at":null,"days_open":89,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":89},"description":"Alva Energy is scaling nuclear power uprates and related first-of-a-kind deployment projects across the U.S. power fleet. We are hiring a Senior NSSS Integration Engineer to lead integration of nuclear steam supply system requirements into Alva’s uprate execution programs, with particular focus on 2TGP integration, plant modifications, and coordination across internal and external engineering teams.\nThis role is a senior technical leadership position for an engineer who can bridge plant operations, systems engineering, transient response, and implementation planning. You will work closely with Alva’s process engineering team, I&C engineering, safety analysis team, EPC partner, utility partner, and NSSS vendor to ensure uprate-related system integration is technically sound, operationally practical, and aligned with plant safety and design basis requirements.\nKey Responsibilities:\nLead NSSS integration for Alva’s 2TGP and related uprate projects, ensuring NSSS requirements are correctly translated into system design, controls philosophy, and implementation scope.\n\nWork with Alva’s 2TGP process engineering team, EPC partner, I&C manager, and DuoSync developer to define and manage the NSSS-side requirements needed for integrated plant operation.\n\nDevelop and define operating strategies and procedures for startup, shutdown, step load changes, ramping, and other transient operating conditions relevant to two turbine plant operation.\n\nServe as the technical bridge between plant operations, process design, controls development, and engineering implementation for NSSS-related system integration.\n\nPartner with Alva’s safety analysis team to review safety analysis outputs and determine required plant modifications, design updates, and engineering actions.\n\nSupport engineering definition and review of NSSS-related plant modifications, including containment, ECCS, auxiliary feedwater, and other systems.\n\nCoordinate technical interfaces among the utility partner, EPC partner, internal engineering team, and NSSS vendor to resolve design, operational, and licensing-basis issues.\n\nReview design packages, technical deliverables, and modification concepts to ensure consistency with plant operating requirements, transient performance expectations, and NSSS design constraints.\n\nQualifications\nBachelor’s degree in Mechanical Engineering, Nuclear Engineering, or related engineering discipline.\n\n10+ years of experience in nuclear power plant operations, systems engineering, design engineering, or plant modification programs.\n\nStrong background in 4-loop PWR operation and systems engineering, ideally with direct experience supporting plant transients, operating procedures, and system response.\n\nDemonstrated experience working across NSSS and balance-of-plant interfaces in an operating plant or major plant modification environment.\n\nFamiliarity with safety analysis and the engineering implications of design-basis and transient performance requirements.\n\nAbility to work effectively across process engineering, I&C, safety analysis, EPC, utility, and vendor organizations.\n\nBreadth of experience in mechanical design, project coordination, and cross-functional technical leadership.\n\nStrong written and verbal communication skills, including the ability to lead technical discussions and drive alignment across diverse stakeholders.\n\nWillingness to travel periodically to utility, partner, and supplier sites as needed.\n\nPreferred Qualifications\nPrior licensed operator, SRO, or equivalent plant operations background at a 4-loop PWR.\n\nExperience supporting uprates, major plant modifications, or first-of-a-kind integration efforts.\n\nFamiliarity with startup test planning, transient analysis inputs, or control system integration in nuclear plant environments.","description_format":"text","description_chars":3790,"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":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":[],"lifecycle":[{"event":"open","at":"2026-09-11T15:06:41Z"}],"liveness":{"score":13,"band":"cold","label":"Long shot","p_open":1,"p_active":0.448,"p_room":0.28,"age_days":88,"expected_fill_days":26,"reasons":["conf:0","win:tail","crowd:"],"computed_at":"2026-09-23T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/alvaenergy-senior-nsss-integration-engineer","json_url":"https://alion.io/job/alvaenergy-senior-nsss-integration-engineer.json","meta":{"generated_at":"2026-09-23T21:03:01Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers"}}