JOB TITLE: Accounts Receivable Specialist
LOCATION: Oklahoma City, OK
REPORTS TO: Accounting Manager
COMPANY: Mach Energy Services LLC
ABOUT US
Mach is a rapidly growing provider of energy-related construction solutions for the upstream and midstream markets. Mach has a position available in our Accounting department as an Accounts Receivable Specialist in Oklahoma City, OK.
POSITION SUMMARY
The Accounts Receivable Specialist is responsible for creating invoices and communicating with customers to collect payment. The AR Specialist also communicates with project managers and directors to bill customers appropriately and manage any changes, disputes, and discrepancies.
KEY RESPONSIBILITIES
- Prepare customer invoices in Viewpoint Spectrum and send to customers
- Apply cash receipts and reconcile payments against open invoices
- Monitor the AR aging and investigate past-due balances
- Bill retainage on completed jobs as directed
- Escalate overdue invoices to the appropriate channels
- Research and resolve invoice discrepancies and disputes
- Prepare weekly AR Reports for directors
- Communicate with customers regarding expected payments
- Coordinate with project managers on lien waivers and retainage as needed
- Support month-end close through timely entry of receivables
REQUIRED SKILLS
- High school diploma or equivalent
- 2+ years of accounts receivable, collections, or general accounting experience
- Proficiency with Microsoft Excel (pivot tables, XLOOKUP), Outlook, Teams, Sharepoint
- Attention to detail and organizational skills
- Professional written and verbal communication
- Ability to manage multiple accounts and deadlines in a fast-paced environment
PREFERRED QUALIFICATIONS
- Associate’s or Bachelor’s degree in Accounting, Finance, or related field
- Experience in the construction industry working directly with project managers
- Familiarity with Spectrum/Viewpoint or similar construction ERP system
- Familiarity with platforms such as Open Invoice and Ariba
- Experience with lien waivers, retainage, T&M billing, schedule of values, pay applications AIA G702/G703
WORKING CONDITIONS
- Use a computer, phone, and standard office equipment.
- Work extended hours and adjust priorities to meet project goals.
- Attend and participate in meetings.
BENEFITS
- Competitive salary and performance-based bonuses
- Health, dental, and vision insurance
- 401(k)
- Paid time off and holidays
Skills Required
- High school diploma or equivalent
- 2+ years of accounts receivable, collections, or general accounting experience
- Proficiency with Microsoft Excel, including pivot tables and XLOOKUP
- Proficiency with Outlook, Teams, and SharePoint
- Attention to detail and organizational skills
- Professional written and verbal communication skills
- Ability to manage multiple accounts and deadlines in a fast-paced environment
- Associate's or Bachelor's degree in Accounting, Finance, or a related field
- Construction industry experience working directly with project managers
- Familiarity with Spectrum/Viewpoint or similar construction ERP system
- Familiarity with Open Invoice and Ariba
- Experience with lien waivers, retainage, T&M billing, schedule of values, and AIA G702/G703 pay applications
What We Do
Mach Energy Services LLC is a full-service energy construction contractor focused on energy infrastructure. Its services include full EPC execution, facility construction, pipeline installation and integrity work, and electrical construction. Founded in 2016, Mach emphasizes safety, operational excellence, customer-focused partnerships, continuous improvement, and a people-first culture while serving energy and industrial customers across multiple U.S. locations throughout its operations.









