Assistant Office Manager
Location: Midtown NYC (Hybrid – 3 Days In-Office)
Salary: Up to $90,000
Industry: 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.
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
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!