What are the responsibilities and job description for the AR / Billing Operations Sr Manager position at Phaxis?
Fully Onsite in El Segundo CA
Pay rate 55-60/hr W2
3 months with potential to hire Role Summary
We are seeking a hands-on AR / Billing Operations Sr Manager to help stabilize and improve a high-volume, multi-system billing and collections environment.
This is a roll-up-your-sleeves role focused on bringing structure, consistency, and accountability to day-to-day operations. The ideal candidate is highly organized, process-driven, and comfortable stepping into ambiguity to quickly establish order.
Given current business needs, we are prioritizing candidates with experience stepping into unstructured environments and quickly establishing process, controls, and operating discipline.
This role will be expected to take immediate ownership of day-to-day operations while implementing structure, consistency, and accountability across the team.
This role has visibility into broader process redesign and system improvements.
Ensure invoices are generated accurately and on time
Implement and enforce daily and monthly billing checklists
Identify and resolve billing errors and inconsistencies
Drive execution of collections workflows and follow-ups
Track aging, past-due accounts, and escalation paths
Ensure consistent activity and visibility across the team
Support monthly AR and billing reconciliations across systems
Ensure reports are consistent, traceable, and repeatable
Help identify and investigate variances
Build and document clear workflows and SOPs
Establish daily, weekly, and monthly checklists across billing and AR
Implement validation and control steps to improve accuracy
Drive adoption and enforce adherence across the team
Support implementation of daily and weekly reporting cadence
Track key metrics including:
- AR aging and past due balances
- Billing timeliness and accuracy
- Collections activity and follow-up
Improve visibility into team performance and operational health
Provide day-to-day structure and oversight for billing and AR activities
Help enforce deadlines, track tasks, and ensure follow-through
Support training and standardization across the team
Drive accountability for deadlines, deliverables, and performance expectations
Reinforce structured ways of working and reduce ad hoc execution
Billing is timely, accurate, and consistently executed
AR reporting and reconciliations are stable and explainable
Core processes are supported by clear checklists and workflows
Team execution improves with better visibility and accountability
5β10 years in AR, billing, or accounting operations
Experience in high-volume or multi-system environments
Strong attention to detail and process orientation
Comfortable working in less structured environments and creating order
Hands-on, proactive, and execution-focused
Strong Excel skills (ability to work with large datasets and reconcile data)
Experience stepping into environments that lack structure and building process from the ground up
This role is focused on execution and stabilization, with the opportunity to expand into a broader role depending on performance and business needs.