Senior NSSS Integration Engineer

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 2

TGP 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.

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

• Work with Alva’s 2
  
  TGP process engineering team, EPC partner, I&C manager, and Duo Sync 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.

• 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.

• 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.