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Accounting & Administrative Assistant

Trillium Staffing is now hiring an Accounting & Administrative Assistant in Wauwatosa WI!  ($18–$22/hr)

We are seeking an Accounting & Administrative Assistant to support both accounting operations and general office functions. This position is contract-to-hire and offers the opportunity to grow with a fast-paced, organized, and collaborative team.

This role handles bookkeeping tasks, AP/AR support, payroll assistance, documentation management, and coordination across departments. The team is currently transitioning from Sage to Unanet ERP, so flexibility, curiosity, and strong follow-through are essential.

If you’re organized, proactive, and pride yourself on getting things done, this role is for you.

Duties:
-Maintain daily bookkeeping tasks and ensure accurate financial records.
-Support accounts payable, accounts receivable, and payroll preparation.
-Track expenses, reconcile accounts, and update financial spreadsheets.
-Assist with project setup, billing documentation, and data entry.
-Provide administrative support to accounting, HR, and leadership teams.
-Manage document organization, reminders, filing, and general office needs.
-Follow up on open items and help ensure deadlines are met.
-Occasionally assist with packaging or inventory support as needed.
Qualifications:
-Strong multitasking and organizational skills.
-Excellent communication — comfortable asking questions and following up.
-Proactive, dependable, and self-directed.
-High attention to detail with accurate data-entry skills.
-Comfortable working independently in a hybrid environment.
-Proficient in Excel and Smartsheet.
-0–2 years of administrative or accounting experience preferred.
-Familiarity with Sage, QuickBooks, or Unanet is a plus
Apply today!

Trillium Construction Services has been recruiting and hiring construction and skilled trades talent for over 30 years. Trillium is an Equal Opportunity Employer.

By applying to this job, I agree to receive electronic communications including SMS text and email regarding future opportunities, referral bonus incentives, and other promotions from Trillium. You may opt out at any time from future communications by responding STOP to any electronic communication. You may view our full privacy policy at https://trilliumstaffing.com/jobs/privacy/.

Trillium offers a comprehensive benefit package that includes the ability to participate in health insurance and retirement plans, paid holidays, state required leave, and vacation days, if applicable. Trillium’s offerings are dependent on the state in which the assignment is located, length of time worked, and may change depending on assignment. Benefit packages for direct hire placements vary based on the client company.

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Contact Us if you have any questions

Our intentions are to fill job vacancies as quickly as possible with qualified candidates. We are always accepting applications if a time sensitive job has an application deadline it is noted in the job description. Click on "Apply" to begin the apply process.

For inquiries regarding eligibility for licenses or credentialing in a specific trade, please visit your state licensing department.