Demo

Senior Office Administrator

Landmarc Environmental Systems
Naperville, IL Full Time
POSTED ON 4/16/2026
AVAILABLE BEFORE 6/15/2026

Responsibilities

  • Overall manage day-to-day office operations and provide administrative support to the field/office staff
  • Using Deltek’s Vantagepoint software, complete client billing and invoice processing, including project set ups and submitting to client portals.
  • Timely entry of timesheets, corporate credit card reports, expense reports, Accounts Receivable, and Accounts Payable invoices
  • Build relationships and communicate promptly with vendors on missing invoices, statements, payments, or other financial needs
  • Understand and maintain Subcontracts and Certificates of Insurance
  • License plate expirations and renewals, purchases, sales, renewals and retrieving titles from other states, etc.
  • Onboarding a very high volume of new employees.  
  • Book travel and coordinate communication for field employees
  • Keep stock and order PPE/other safety gear for the field employees
  • Use spreadsheets to organize employee information
  • Receive incoming mail, notify departments as necessary, and process in a timely manner
  • Gather documents and assist team members with general contracting/business licenses in several states
  • Manage and track outgoing packages
  • High-quality conduct to anything client-facing (billing submittals, email, etc)
  • Keep open communication with other Landmarc OA’s
  • Assist other company offices and departments for yearly safety training (hotels, transportation, supplies, be available for needs at training)
  • Work as a team member and contribute as an individual in all tasks assigned
  • Other projects, as assigned by principals, project managers, accounting supervisors, and HR supervisors

Qualifications

  • Minimum 3-5 yrs. professional experience of an administrative/financial support role with a professional construction services firm strongly preferred
  • Associate’s or Bachelor’s Degree in Business or related field preferred
  • Exceptional organizational and critical thinking skills
  • The ability to multitask effectively and change course quickly based on priority of the task is essential.
  • Extremely detail oriented and proficient in communications and financial matters
  • Ability to see and meet a need before it arises
  • Proficiency in Adobe and Microsoft Office Suite, specifically Word, Outlook, and Excel required
  • Availability to work after hours as required

Salary : $60,000 - $80,000

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