Demo

Administrative Assistant III

Lensa
Walnut, CA Full Time
POSTED ON 12/6/2025 CLOSED ON 12/31/2025

What are the responsibilities and job description for the Administrative Assistant III position at Lensa?

Lensa is a career site that helps job seekers find great jobs in the US. We are not a staffing firm or agency. Lensa does not hire directly for these jobs, but promotes jobs on LinkedIn on behalf of its direct clients, recruitment ad agencies, and marketing partners. Lensa partners with DirectEmployers to promote this job for Calpine. Clicking "Apply Now" or "Read more" on Lensa redirects you to the job board/employer site. Any information collected there is subject to their terms and privacy notice.

Description

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.

Job Summary (includes but is not limited to the following, other duties may be assigned)

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.

Job Responsibilities

  • 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 DocuSign.
  • 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.

Job Requirements

  • 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, DocuSign). Strong excel and power point 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 communicate effectively among all levels of the organization.
  • Exceptional judgment and problem-solving skills.
  • Highly adaptable, enthusiastic, ambitious and willing to learn.

Salary Information

Hourly pay range $38.50 - $48.00 / per hour

Additional Calpine Information

  • Equal Opportunity Employer of Minorities, Females, Protected Veterans, and Individuals with Disabilities.
  • Calpine is committed to Equal Employment Opportunity and providing reasonable accommodations to applicants with physical and/or mental disabilities. If you are interested in applying for employment and need special assistance or an accommodation to use our website or to apply for a position, please send an e-mail with your request to hrrecruitment@calpine.com. Determination on requests for reasonable accommodation are made on case-by-case basis.
  • Please view Equal Employment Opportunity Posters provided by OFCCP here (http://www.dol.gov/ofccp/regs/compliance/posters/ofccpost.htm)

Equal Opportunity Employer/Protected Veterans/Individuals with Disabilities

This employer is required to notify all applicants of their rights pursuant to federal employment laws. For further information, please review the Know Your Rights (https://www.eeoc.gov/poster) notice from the Department of Labor.

If you have questions about this posting, please contact support@lensa.com

Salary : $39 - $48

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