Senior Human Resources Manager
About Flatiron Energy
Flatiron Energy, a Hull Street Energy portfolio company, is developing and building grid scale standalone energy storage assets that integrate renewable energy onto the grid, replace fossil fuel plants, and increase grid reliability. Founded by a team of experienced energy storage experts, Flatiron has a demonstrated track record of developing critical infrastructure needed to achieve our reliability and energy climate goals. The leadership team has deep experience in developing, constructing and operating energy storage assets in wholesale markets.
Flatiron Energy is a growing company with a dynamic, fast-paced, challenging, creative, fun, start-up culture. The right candidate will be excited to help build the company from the ground up, recognizing the challenges and opportunities for growth inherent in such a role. The Flatiron team is passionate about fighting climate change while ensuring their projects have an equitable impact on surrounding communities. Flatiron is only looking for candidates who resonate with our mission.
Title: Senior HR Manager
Reports To: CEO
Location: Boulder/Denver, New York City, or Boston preferred, remote also considered
Description: The Senior HR Manager will play a key role in building out Flatironâs human resources function and supporting our employees. enabling the growth of our employees in their careers. Reporting directly to the CEO, youâll own employee relations matters end-to-end, drive consistency in performance management, hiring workflows, documentation, benefit management, and employee engagement. In this role you will advise leadership on best practices, lead performance management and processes, develop career progression plans, and create new tools and protocols to enhance people operations and effectiveness.
Key Responsibilities:
- Own employee relations matters end-to-end, from candidate hiring to new hire training to employee performance management
- Organize and run annual and quarterly performance review cycles (communications, manager enablement, and completion tracking)
- Partner with leadership
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FAQ
- Is the Senior Human Resources Manager position at Flatiron Energy remote?
- Yes. This role was posted on Remote Frontend Jobs, a job board that lists exclusively fully remote positions.
- When was this Senior Human Resources Manager job posted?
- This listing was posted on March 4, 2026 and is still open for applications.
- How do I apply for the Senior Human Resources Manager position at Flatiron Energy?
- Use the apply button on this page — it takes you directly to the employer’s application page.