Full-Time

Power System Modeling Manager

Posted on 10/31/2025

FlexGen

FlexGen

201-500 employees

Energy storage systems with optimization software

No salary listed

Remote in USA

Remote

Category
Electrical Engineering (1)
Requirements
  • Master’s degree in Electrical Engineering, Power Systems, or related field
  • 5+ years of professional experience in power system modeling and analysis
  • Proficiency with PSCAD, PSS®E, or comparable simulation platforms
  • Strong knowledge of NERC, ISO/RTO interconnection and modeling requirements
  • Experience managing external consultants and/or cross-functional technical teams
  • Ability to translate modeling outcomes into software specifications and product features
  • Excellent communication and stakeholder engagement skills
Responsibilities
  • Lead the design, development, and maintenance of dynamic models (e.g., PSCAD, PSS®E, EMT-type) for interconnection and grid studies
  • Ensure all models comply with NERC, ISO, RTO, and international grid code requirements
  • Provide clear technical specifications and executable prototypes to guide new HybridOS feature development
  • Coordinate with global modeling consultants, for both US and non-U.S. markets
  • Review and validate third-party deliverables to ensure accuracy, quality, and compliance with regulatory standards
  • Represent HybridOS modeling capabilities in customer and stakeholder discussions
  • Address technical modeling inquiries during project execution and proposal phases
  • Support project-specific modeling needs by adapting or developing models as required
  • Work closely with software engineering teams to integrate modeling requirements into product development
  • Contribute to QA/QC processes for models and modeling workflows
  • Participate in industry forums and technical committees to influence and stay ahead of modeling standards and trends
Desired Qualifications
  • Experience with distributed energy resources (DERs), hybrid plants, or inverter-based resources
  • Familiarity with international grid codes (e.g., Australia, Germany, Europe)
  • Understanding of Agile or modern software development workflows
  • Exposure to both regulated and deregulated electricity markets

FlexGen provides integrated energy storage solutions by designing and deploying battery energy storage systems (BESS) and pairing them with HybridOS, a proprietary software platform that manages and optimizes these assets. The product combines hardware and software to enable automated energy dispatch from batteries, solar/wind, and conventional generators to meet grid demands. It can manage a single site or an entire fleet of storage assets and delivers real-time data and performance analytics. Unlike competitors that may focus on either hardware or software alone, FlexGen offers a tightly integrated, software-first solution that coordinates multiple energy sources and storage assets in one system. Its goal is to support the energy transition by stabilizing the power grid, integrating renewable energy, and ensuring reliable power supply for utilities, independent power producers, and large industrial customers, while optimizing asset performance and cost for its customers.

Company Size

201-500

Company Stage

Debt Financing

Total Funding

$357.5M

Headquarters

Durham, North Carolina

Founded

2009

Simplify Jobs

Simplify's Take

What believers are saying

  • CES acquisition adds 125 technicians and 15 GWh commissioning expertise.
  • Powin assets expand footprint to 25 GWh in 10 countries.
  • Rosendin partnership targets data center power reliability growth.

What critics are saying

  • Tesla dominates utility-scale storage, eroding FlexGen's market share.
  • CES integration causes operational friction and customer churn.
  • Battery chemistry shifts obsolete HybridOS State of Health algorithms.

What makes FlexGen unique

  • HybridOS v13 provides predictive diagnostics and unified solar-storage control.
  • Hardware-agnostic EMS manages 25 GWh across 10 countries.
  • 98% fleet availability outperforms industry by 5%.

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Benefits

Health Insurance

Paid Vacation

Paid Sick Leave

Paid Holidays

Growth & Insights and Company News

Headcount

6 month growth

0%

1 year growth

2%

2 year growth

2%
The Associated Press
Apr 2nd, 2026
FlexGen acquires Clean Energy Services to enhance battery storage reliability and expand service offerings

FlexGen Power Systems has acquired Clean Energy Services (CES), a provider of battery energy storage and utility-scale solar services. The deal strengthens FlexGen's battery storage leadership by adding CES's commissioning and lifecycle service capabilities to its existing software offerings. Founded in 2022, CES will operate as a FlexGen subsidiary whilst maintaining its existing customer base. CES brings over 125 field technicians and engineers, having commissioned more than 15GWh of battery storage systems and servicing over 1GW of solar and 4.5GWh of battery assets. The acquisition enables FlexGen to offer integrated solutions combining its HybridOS energy management software with CES's field service expertise. CES will continue operating its remote operations centre in Houston, whilst FlexGen maintains its Durham facility, together providing 24/7 monitoring across their combined portfolios.

The Associated Press
Feb 19th, 2026
FlexGen unveils HybridOS v13 energy management system for battery storage and solar projects

FlexGen Power Systems has announced the latest version of its HybridOS energy management system, designed to maximise performance for battery storage and solar projects. The hardware-agnostic platform features a unified user interface providing real-time visibility across all assets from a single panel. Key updates include predictive diagnostics to identify hardware issues proactively, enhanced battery management system functionality to extend battery lifespan, and expanded power plant controller capabilities for unified solar and storage management. The system enables operators to increase grid service participation and convert curtailed energy into dispatchable power during peak demand. FlexGen serves over 200 energy storage systems totalling more than 25 GWh globally. The company provides battery energy storage solutions and software to utilities, developers and industrial clients.

EnergyStoragePro
Aug 22nd, 2025
FlexGen Acquires Powin Assets, Growing Energy Storage Footprint to 25 GWh in 10 Countries

FlexGen acquires Powin assets, growing energy storage footprint to 25 gwh in 10 countries.

Batteries International
Aug 15th, 2025
FlexGen secures court approval for Powin assets acquisition

August 15, 2025: Flexgen Power Systems said on August 6 it had been given court approval to acquire a substantial portion of the business of US-based BESS developer Powin.

Latitude Media
Aug 13th, 2025
Can FlexGen leverage Powin's bankruptcy to compete with Tesla?

A bankruptcy court in New Jersey last week approved a deal in which FlexGen Power Systems will purchase intellectual property and a "significant spare parts inventory" from former competitor Powin.

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