Outsourced Accounting Summer Internship 2027

Withum; East Brunswick Township (NJ); On-site; USD 21,000 - 34,000; Full time

Job summary

Withum offers an internship through the Outsourced Accounting Systems and Services (OASyS) team in New Jersey. The role supports multiple client needs, including billings, reconciliations, and payroll, while gaining hands-on experience with leading software like QuickBooks Online, Bill.com, Expensify, Gusto, Justworks, Xero and Excel.

We seek graduating or current students in accounting with a 3.0+ GPA and strong teamwork, communication and organizational skills.

Qualifications

• GPA of 3.0 or higher
• Pursuing an accounting degree with strong academics
• Excellent interpersonal and computer skills
• Experience with accounting software as listed

Responsibilities

• Collaborate with senior staff to support multiple client needs
• Manage bill payments, invoicing and cash receipts
• Perform bank and general ledger reconciliations
• Assist with monthly, quarterly and annual close processes
• Run payroll and reconcile related journal entries
• Assist with setup and implementation of new accounting systems
• Support ad hoc accounting and reporting projects (client-facing and internal)
• Communicate clearly with clients and coworkers across channels

Skills

Interpersonal skills

Project management

Teamwork

Attention to detail

Education

Pursuing Bachelor's or Master's in accounting

Tools

QuickBooks Online

Bill.com

Expensify

Gusto

Justworks

Xero

Excel

Job description

Withum is a place where talent thrives - where who you are matters. It’s a place of endless opportunities for growth. A place where entrepreneurial energy plus inclusive teamwork equals exponential results.

Explore different industries. Learn new skills. Connect with our diverse teams of professionals to gain insight into the career you envision. Your Career Starts with You.

Experience the Transformative Power of Withum Plus You - that’s the Power in the Plus!

Job Description

Withum's Outsourced Accounting Systems and Services (OASyS) brings clients into the digital age by providing scalable outsourced accounting and finance services that improve a company’s workflow and transparency. We understand that business owners want to focus on their passion while having full knowledge of their financial standing and performance. OASyS provides that stress-free solution of a perfectly framed financial picture, saving companies valuable time and money. Every business’s needs are different based on their stage in the business lifecycle, so we’ve tailored our services to fit exactly what you need. Our clients range from large organizations that prefer not to staff and manage an accounting department, to smaller entities or startups that need a 360-degree approach to direction and support.

Dates: June 7th, 2026 to August 13th, 2026

In Office

How You Will Spend Your Time

• Collaborating with Senior Associates, Managers and group Partners to support and balance multiple client needs.
• Managing bill payments, invoicing and cash receipt applications for clients in a timely fashion.
• Performing bank and general ledger account reconciliations; investigating and resolving reconciling items.
• Assisting with monthly, quarterly and annual close processes for clients.
• Running payroll and reconciling related journal entries.
• Assisting with setup and implementation of new accounting systems and procedures based on client needs.
• Assisting with various ad hoc accounting and reporting projects, both client-facing and internal.
• Effectively and clearly communicating with clients and coworkers across various channels.

The Kinds of People We Want to Talk to Have Many of The Following:

• Graduating college student pursuing a Bachelor's or Master's degree in accounting
• GPA of 3.0 or higher
• Excellent interpersonal and computer skills
• Extensive experience with QuickBooks Online, Bill.com, Expensify, Gusto, Justworks, Xero and Excel.
• Strong interpersonal, communication and project management skills.
• Ability to work well on a team.
• A highly organized personality with strong attention to detail.
• A flexible and adaptable attitude to new situations, including learning new software.

Be in a Position of StrengthSM. Start your career at Withum.

Withum will not discriminate against any employee or applicant for employment because of race, color, religion, sex, sexual orientation, gender identity, national origin, age, marital status, genetic information, disability or because he or she is a protected veteran.

No sponsorship is available for this position.

WithumSmith+Brown, PC is an equal opportunity employer and does not discriminate against otherwise qualified applicants on the basis of race, color, creed, religion, ancestry, age, sex, (including pregnancy), genetic information, marital status, domestic partnership status, familial status, affectional or sexual orientation, gender identity, citizenship status, national origin, disability or handicap, veteran status, weight, height, or any other classification protected by federal, state, or local law.