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Office Administrator

Apex Companies, LLC
$23—$25
tuition assistance, 401(k)
United States, California, Brentwood
May 05, 2026

Are you highly motivated, hard-working, and seeking to join a growth-focused consulting & engineering firm? Are you looking for a company that will invest in your development and grow your professional skills? If so, consider a career with Apex!

Powered by record sales, extraordinary client retention, strategic acquisitions, and an entrepreneurial spirit, Apex Companies is one of the fastest growing engineering and environmental consulting firms in the US.We were recently recognized by the Zweig Group as one of the fastest growing firms in the AEC industry.We take pride in providing our clients with exceptional service and have earned numerous awards for project excellence. We continue to grow, andwe want you to grow with us.

We're seeking a dynamic Office Administrator to join our Brentwood, CA team. In this role, you'll play a key part in keeping our workplace running smoothly and efficiently. You'll serve as the goto resource for office organization, coordination, and administrative support-helping ensure our teams can stay focused, productive, and supported.


Key Responsibilities Include but are not limited to:

  • Coordinate office space, organization, and daytoday logistics
  • Purchase, manage, and track office supplies and vendor services
  • Support office and departmental operations, ensuring processes run smoothly
  • Provide administrative support, including scheduling, coordinating meetings, and assisting with projects
  • Compile, edit, and create professional documents, reports, and correspondence
  • Proactively identify opportunities to improve office efficiency and support business needs


What We're Looking For

  • High school diploma or GED required
  • 5-7 years of experience in an office or administrative role within a professional services environment
  • Experience with office management, document preparation, and document control
  • Strong attention to detail and the ability to manage multiple priorities simultaneously
  • Excellent written and verbal communication skills
  • Proficiency with Microsoft Office (Word, Excel, PowerPoint, Outlook) and Adobe Acrobat
  • Reliable, selfmotivated, and wellorganized, with a strong sense of accountability
  • Proven history of stable employment, along with excellent attendance and punctuality

Why you'll love working for us:



  • Company-subsidized medical and dental.
  • Company-paid life, short, and long-term disability.
  • 401k match, tuition assistance, and more.
  • Cross-training and the ability to work on a variety of projects.
  • Performance-based bonuses or other incentives.
  • Working with the best and brightest in the industry.
  • 2,000+ employee national firm with 70+ locations across the US.



Apex Job Title: Office Administrator

Req ID: 11533

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Hourly Expected Pay Range
$23 $25 USD

We believe in equality for all and celebrate the diversity and differences of our employees, customers, and communities. We do not discriminate based on gender, race or color, ethnicity or national origin, age, disability, religion, sexual orientation, gender identity or expression, veteran status, or any other applicable characteristics protected by law. Apex aims to make apexcos.com accessible to all users. If you have a disability or special need that requires accommodation to navigate our website or complete the application process, please contact Talent@apexcos.com or (301) 417-0200. Likewise, feel free to reach out to us if you would like to view or discuss Apex policy related to equal employment opportunity or have any related concerns. EO/AA/VEV/Disabled Employer

TO ALL RECRUITMENT AGENCIES: Apex Companies does not accept unsolicited agency resumes. Please do not forward resumes for any of our job postings to our career's sites, or to any employees of Apex Companies or affiliates. Apex Companies is not responsible for any fees related to unsolicited resumes.

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