Billing Assistant

Simpson Thacher & Bartlett LLP

Billing Assistant supporting billing coordinators and attorneys in a law firm. Responsible for invoice preparation, processing, and administrative duties in a fast-paced environment.

Posted 7/28/2026full-timeNew York City • New York • 🇺🇸 United StatesJuniorMid-Level💰 $65,000 - $75,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Proficient in billing processes and e-billing systems, with strong attention to detail and the ability to communicate effectively with various stakeholders. Demonstrates analytical and problem-solving skills while maintaining confidentiality and adapting to fast-paced environments.

Highest-signal resume keywords

Billing ExperienceE-Billing Hub ProficiencyMicrosoft Office Suite KnowledgeStrong Communication SkillsAttention to Detail

ATS Keywords

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Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills

BillingFinanceAccountingBasic Math SkillsAnalytical SkillsProblem-Solving Skills

Soft Skills

Customer Service SkillsEffective CommunicationTeam CollaborationAdaptabilityDiscretion

Tools & Technologies

3EE-Billing Hub

Industry Keywords

Law Firm EnvironmentInvoice ProcessingClient GuidelinesConfidentialityBilling Strategy

About the role

Key responsibilities & impact

Assist Billing Coordinators with creating, editing, and processing high volume of invoices in a timely manner.
Review invoices for misallocated time and ensure time entries are in accordance with client guidelines.
Edit draft invoices based on partner mark-up, including: time entry narrative changes, fee/cost transfers, splitting entries, unblocking entries, on-account applications, and write-offs in accordance with firm policy.
Assist Billing Coordinators with the filing of bill packages in accordance with department policy.
Attend meetings with Billing Managers, Billing Coordinators, and/or Partners to discuss monthly billing strategy and outstanding invoices.
Maintain and update special instructions and internal comments related to billing attorneys’ clients and matters.
Assist with electronic invoice submissions by submitting e-bills via eBillingHub and/or the client’s designated e-billing website.
Assist with identifying e-billing issues; work to resolve e-bill rejections and short payments.
Provide department-wide administrative support as needed (ie. filing, providing client invoice copies, pulling expense back up, etc.).
Respond to inquiries and requests for information made by attorneys, secretaries, legal and non-legal staff using effective communication skills, both oral and written, in a timely manner.
Actively seek to enhance knowledge of all billing related processes and procedures.
Use sound judgement when approaching problems and making decisions.
Observe confidentiality of client and firm matters.
Assist with special projects.
Flexibility to work additional hours as needed.

Requirements

What you’ll need

1-2 years billing, finance or accounting experience in a law firm environment
1 year experience with 3E and E-Billing Hub or related applications
Strong communication skills, both written and oral
Ability to effectively present information verbally and in writing
Basic math skills: add, subtract, multiply, divide, percentage calculations, etc.
Knowledge of Microsoft Office Suite
Ability to work effectively, independently, at times with minimal supervision, in a fast-paced environment
Must be able to work collaboratively in a team environment
Strong attention to detail
Strong customer service skills
Demonstrated analytical and problem-solving skills
Ability to adapt to all work situations in order to achieve desired results
Ability to use discretion with sensitive and confidential information

Benefits

Comp & perks

Health insurance
Paid time off
Flexible work arrangements