Senior Office Manager

Overview

About us:

Founded in 1990, LS Power is a premier development, investment, and operating company focused on the North American power and energy infrastructure sector, with leading platforms across generation, transmission and energy expansion solutions. Since inception, LS Power has developed or acquired 50,000 MW of power generation, including utility-scale solar, wind, hydro, battery energy storage, and natural gas-fired facilities. Through its transmission business, LS Power Grid, the company built and operates 780+ miles of high-voltage transmission and 7 transmission utilities and has another 375+ miles currently in construction or development. LS Power actively invests in and scales businesses that are meeting the growing needs of the energy expansion, including electric vehicle charging, demand response, microgrids, renewable fuels and waste-to-energy platforms. Over the years, LS Power has raised more than $89 billion in debt and equity capital to support North American infrastructure.

Our Purpose, Mission, & Values:

Our Purpose is to solve complex energy problems that improve the world

Our Mission is to make lives better by developing a cleaner and more reliable energy ecosystem

Our Values are the willingness to participate in and help strengthen our culture of integrity, Innovation, Teamwork, and Taking Ownership

Our People create value and are our Most Valuable asset. We take our values of Integrity, Innovation, Teamwork and Taking Ownership seriously and ask candidates to think about how they can help us further enhance our culture with their specific skillsets, capabilities and experiences.

Benefits

We provide our team the opportunity to share their unique perspectives, solve new challenges, and continue in their career growth. We are committed to supporting employees’ happiness, healthiness, and overall well-being by providing comprehensive benefits that include 100% employer paid premium healthcare, paid parental leave and more.

About the Role:

We currently have an opportunity for a Sr. Office Manager who is responsible for overseeing the daily operations of the office, ensuring efficiency and a positive work environment. This role leads a small administrative team, providing guidance, mentorship, and support while managing office functions, processes, and projects. As the Sr. Office Manager, you are a key resource for staff and leadership, driving operational excellence and fostering a collaborative, organized, and professional workplace.

Responsibilities

What You Will Do

• Lead, mentor, and manage a team of administrative professionals.

• Oversee day-to-day office operations, ensuring smooth workflows and efficiency.

• Implement and maintain office policies, procedures, and best practices.

• Coordinate onboarding, training, and development for office staff.

• Manage vendor relationships, office supplies, and facilities support.

• Support leadership with projects, communications, and administrative initiatives.

• Ensure the office environment reflects LS Power's standards for professionalism and collaboration.

Qualifications

We Want You On Our Team Because You...

• Are focused on day-to-day office operations, team mentoring, and process oversight.

• Demonstrate Integrity in managing operations and leading your team.

• Exhibit Innovation by improving office processes and creating efficiencies.

• Thrive on Teamwork, supporting staff and collaborating with leadership.

• Take Ownership of responsibilities, balancing multiple priorities effectively.

• Possess strong organizational, problem-solving, and communication skills.

• Are proficient in Microsoft Office Suite and office management systems.

Ideally, You Have

• Hold a college degree or equivalent.

• 5–7 years of relevant administrative or office management experience.

• Includes supervisory or team leadership experience (managing a small team, e.g., 2–4 staff).

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Job Locations US-MO-Chesterfield

ID 2026-1955

Category Administrative Services

Type Full Time