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Office Assistant/Accounting Administrative Assistant, Job# 22583

Keystone Staffing

Earht City, MO · Posted October 13, 2026

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About the job

Office Assistant / Accounting Administrative Assistant

Position Type: Temp-to-Hire

Schedule: Monday–Friday, 8:00 a.m.–4:30 p.m.

Dress Code: Business Casual

Salary: $65k to $75k

Software Requirements: Extensive Sage accounting software experience

Position Overview

Our client is seeking a detail-oriented, organized, and dependable Office Assistant to support daily administrative and accounting-related functions. This position is heavily focused on high-volume data entry, order processing, and maintaining accurate information in Sage accounting software, as well as managing electronic documents and shared folders.

The ideal candidate will have extensive hands-on experience with Sage accounting software, a solid understanding of basic accounting principles, and strong computer skills. This individual will support the sales team, assist with accounts payable and receivable-related activities, process orders and invoices, handle customer communications, and perform general office duties.

Accuracy, organization, and the ability to manage repetitive data entry tasks while maintaining attention to detail are essential to success in this role.

Key Responsibilities

Data Entry & Accounting Support

• Perform extensive, accurate data entry in Sage accounting software and company shared folders.

• Enter and process customer orders, invoices, expenses, and other accounting-related information.

• Demonstrate a working understanding of basic accounting principles, including accounts payable (AP), accounts receivable (AR), income, expenses, account numbers, and job costing.

• Review and enter information accurately to help maintain organized and reliable financial and operational records.

• Scan, upload, organize, and maintain documents in electronic filing systems and shared folders.

• Assist with processing incoming claims and maintaining supporting documentation.

Administrative & Customer Service Support

• Provide administrative assistance to sales representatives and support order processing.

• Communicate with vendors, customers and clients by phone and email regarding orders, invoices, claims, and general inquiries.

• Answer incoming calls and provide receptionist coverage as needed.

• Assist with soft collections, including professional follow-up on outstanding invoices and payment inquiries.

• Manage emails and distribute information to the appropriate individuals.

• Perform occasional paper filing and other general office duties as needed.

Required Qualifications

• Extensive hands-on experience with Sage accounting software is required.

• Strong data entry skills with excellent accuracy and attention to detail.

• Working knowledge of basic accounting principles, including AR, AP, income, expenses, account numbers, and job costs.

• Good working knowledge of Microsoft Office, Outlook, OneDrive, shared folders, and Adobe.

• Experience scanning, uploading, organizing, and maintaining electronic documents.

• Strong organizational, communication, and customer service skills.

• Ability to manage repetitive tasks, prioritize responsibilities, and work independently.

• Professional demeanor and a dependable, detail-oriented approach to work.

Position Details

• Temp-to-hire opportunity.

• Monday through Friday, 8:00 a.m.–4:30 p.m.

• Business-casual office environment.

• Primarily office-based with minimal travel.

• No payroll responsibilities.

Ideal Candidate

The ideal candidate is an experienced administrative professional who is highly proficient in Sage accounting software, comfortable with extensive data entry, and familiar with the accounting basics needed to accurately process orders, invoices, expenses, and job costs. They should be comfortable working with electronic files and multiple computer applications while providing professional support to the sales team and customers.