Administrative Assistant III

Calpine Corporation is America’s largest generator of electricity from natural gas and geothermal resources with operations in competitive power markets. Our fleet of 79 energy facilities in operation represents over 27,000 megawatts of generation capacity. Through wholesale power operations and our retail businesses, we serve customers in 22 states and Canada. Our clean, efficient, modern and flexible fleet uses advanced technologies to generate power in a low-carbon and environmentally responsible manner.

We are uniquely positioned to benefit from the secular trends affecting our industry, including the abundant and affordable supply of clean natural gas, environmental regulation, aging power generation infrastructure and the increasing need for dispatchable power plants to successfully integrate intermittent renewables into the grid.

Position is located in Walnut Creek, CA and is not a remote position, must be in the office 5 days a week.

If you are looking for an opportunity to work with extremely dynamic professionals, in a fast-paced, high functioning office, then look no further, Calpine is the place for you.

We are seeking an experienced, proactive, detail-oriented and tech savvy Administrative Assistant to support our busy West Region Legal team. This role is essential in supporting smooth day-to-day operations. This role requires discretion, professionalism and the ability to anticipate needs and juggle multiple priorities in a fast-paced environment. Document management, workflow automation and technology tools are a plus.

Provides high level administrative support duties to the legal leadership team, with willingness to help other departments with administrative tasks, as needed. Manages calendars, coordinates meetings and coordinates travel arrangements. Maintains and organizes department and project files. Prepare and edit correspondence, presentations, reports and other documents. Coordinate execution of documents in accordance with Company policy. Prepares a variety of reports including weekly/monthly department status updates, routine project progress, business development activities and expense reports frequently using Microsoft applications such as Word, Excel and PowerPoint.

Assists in planning department and regional meetings, off‑sites and events.

• Manage calendars, coordinates meetings and books travel arrangements.
• Prepare agendas, gather materials, take minutes for West region office matters.
• Manage electronic and physical files, ensuring accuracy, version control and compliance with retention policies.
• Maintain and organize digital document management systems (e.g., Sharepoint).
• Draft, proofread and format legal documents, correspondence and presentations.
• Coordinate e‑signature workflows and manage document execution tracking using platforms like Docu Sign.
• Assist in legal technology implementation and user training to help drive efficiencies across legal department.
• Track legal matters, deadlines and deliverables, and support case and contract management systems, including data entry, tracking deadlines, and status updates.
• Conduct legal and factual research using on‑line databases and tools as needed.
• Handles highly confidential and sensitive information with the utmost discretion.
• Other tasks and duties, as required.

• Associate’s Degree, Technical/Business School or equivalent education and experience.
• 5+ years’ demonstrated experience in a fast‑paced professional services environment, including advanced support skills and extensive knowledge of tools, software and other technologies.
• Paralegal certificate or Bachelor's degree preferred.
• Strong proficiency with legal and business software (e.g., Microsoft 365, Sharepoint, Docu Sign). Strong Excel and PowerPoint skills preferred.
• Excellent organizational and time management skills and the ability to manage multiple priorities with poise and efficiency.
• High attention to detail and ability to work independently in an unstructured environment with minimal supervision.
• Excellent people skills with the ability to…