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SourcePro Search, LLC

Assistant Office Manager (Law Firm Experience)

SourcePro Search, LLC, New York

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Assistant Office Manager
Location: Midtown NYC (Hybrid - 3 Days In-Office)Salary: Up to $90,000Industry: Law Firm
SourcePro Search is partnering with a respected and energetic mid-size law firm in Midtown Manhattan to find a sharp, detail-oriented Assistant Office Manager . This is an excellent opportunity for someone with a strong foundation in law firm billing, AP/AR , and office operations who's ready to step into a key leadership support role.
The right candidate is organized, proactive, flexible , and capable of juggling priorities while keeping a calm, professional demeanor. This role offers a collaborative hybrid schedule and an opportunity to truly grow with a firm that values both structure and innovation.
What You'll Do:
  • Support the Office Manager and Managing Partners with high-level administrative and operational tasks
  • Handle monthly billing , including posting client expenses in Timeslips and QuickBooks, and preparing LEDES1998-compliant client bills
  • Manage accounts payable, receivable, collections, deposits, and trust fund accounts
  • Communicate directly with vendors and monitor invoice status and resolution
  • Oversee expense reimbursements and assist with payroll coordination
  • Help coordinate HR and benefits administration , and support onboarding and training of new hires
  • Maintain proper file management systems using FileVine and assist with general office support
  • Generate regular administrative reporting for firm leadership
What You'll Bring:
  • 3-5 years of law firm or professional services office administration experience
  • Prior hands-on experience with billing, AP, AR, and collections
  • Tech-savvy with strong proficiency in QuickBooks, Timeslips, Outlook, Word, and Excel
  • Ability to juggle multiple responsibilities , work independently, and remain composed under pressure
  • Excellent written and verbal communication skills
  • A team-oriented mindset with a respectful and professional approach when working with all levels of staff and leadership
  • Discretion and trustworthiness in handling confidential data
  • Experience with FileVine , HR , or benefits is a plus

If you're seeking a growth-oriented support role in a fast-paced, highly collaborative legal environment, this opportunity could be the perfect fit.
Apply today through SourcePro Search to be considered for this exciting role!