AR / Billing Operations Sr Manager

Phaxis; El Segundo (CA); On-site; USD 77,000 - 83,000; Full time

Job summary

Phaxis is seeking a hands-on AR/Billing Operations Sr Manager in El Segundo to stabilize a high-volume environment across multiple systems. This onsite role aims to install structure, controls, and accountability, with potential for hybrid work after stabilization.

The candidate should bring 5–10 years in AR/billing operations, a proven ability to implement processes quickly, and strong Excel skills to manage large data sets and reconcile information.

Qualifications

• 5–10 years in AR, billing, or accounting operations.
• Experience in high-volume or multi-system environments.
• Hands-on, proactive, and execution-focused; able to create order in unstructured settings.

Responsibilities

• 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.
• Establish daily, weekly, and monthly checklists across billing and AR.
• Build and document clear workflows and SOPs.

Skills

AR operations

Billing

Process improvement

Excel

Operations leadership

High-volume environments

Tools

Excel

Job description

Location: El Segundo, CA (Onsite with potential for hybrid after stabilization)

Pay rate $56-60/hr W2

3+ months contract 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.

Responsibilities

• 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.

Qualifications

• 5-10 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.