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Open nowPosted 121 days ago

Senior NSSS Integration Engineer

Alva Energy, Inc7 open roles

Where
Cambridge (Hybrid)
Work mode
Hybrid
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Your applicationOpen nowSenior NSSS Integration EngineerAlva Energy, Inc · Cambridge (Hybrid)

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The clock on this job

Early applications get read.

12.3% of postings close within 7 days. Measured by our own scanner across the market. Alva Energy, Inc postings stay open a median of 10 days.

Share of postings closed within
  1. 2.1%1 day
  2. 4.5%3 days
  3. 12.3%7 days
  4. 19.3%14 days
  5. 35.6%30 days
  6. 57.8%60 days
This job: posted 121 days ago

Alva Energy, Inc median: 10 days open

The posting

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.

This 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.

Key Responsibilities:

- Lead NSSS integration for Alva’s 2TGP and related uprate projects, ensuring NSSS requirements are correctly translated into system design, controls philosophy, and implementation scope.

- Work 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.

- Develop and define operating strategies and procedures for startup, shutdown, step load changes, ramping, and other transient operating conditions relevant to two turbine plant operation.

- Serve as the technical bridge between plant operations, process design, controls development, and engineering implementation for NSSS-related system integration.

- Partner with Alva’s safety analysis team to review safety analysis outputs and determine required plant modifications, design updates, and engineering actions.

- Support engineering definition and review of NSSS-related plant modifications, including containment, ECCS, auxiliary feedwater, and other systems.

- Coordinate technical interfaces among the utility partner, EPC partner, internal engineering team, and NSSS vendor to resolve design, operational, and licensing-basis issues.

- Review design packages, technical deliverables, and modification concepts to ensure consistency with plant operating requirements, transient performance expectations, and NSSS design constraints.

Qualifications

- Bachelor’s degree in Mechanical Engineering, Nuclear Engineering, or related engineering discipline.

- 10+ years of experience in nuclear power plant operations, systems engineering, design engineering, or plant modification programs.

- Strong background in 4-loop PWR operation and systems engineering, ideally with direct experience supporting plant transients, operating procedures, and system response.

- Demonstrated experience working across NSSS and balance-of-plant interfaces in an operating plant or major plant modification environment.

- Familiarity with safety analysis and the engineering implications of design-basis and transient performance requirements.

- Ability to work effectively across process engineering, I&C, safety analysis, EPC, utility, and vendor organizations.

- Breadth of experience in mechanical design, project coordination, and cross-functional technical leadership.

- Strong written and verbal communication skills, including the ability to lead technical discussions and drive alignment across diverse stakeholders.

- Willingness to travel periodically to utility, partner, and supplier sites as needed.

Preferred Qualifications

- Prior licensed operator, SRO, or equivalent plant operations background at a 4-loop PWR.

- Experience supporting uprates, major plant modifications, or first-of-a-kind integration efforts.

- Familiarity with startup test planning, transient analysis inputs, or control system integration in nuclear plant environments.

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