U.S. Based Online Accounting & Bookkeeping Services

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About OSI

OSI Business Services, LLC. was started to provide outsourced online bookkeeping and accounting services to small, mid-size and fast growing businesses. Our mission is three-fold:

Provide the highest level of customer support.
Deliver services in a timely, efficient and precise manner.
Exceed our client's expectations.

Dennis Najjar

Dennis Najjar, Managing Member of OSI Business Services, LLC. has worked in public accounting since 1982. After graduating from Rutgers University in 1982, Dennis joined Coopers & Lybrand. In 1986, Dennis started the public accounting firm Dennis M. Najjar, CPA. Dennis has worked exclusively with small, medium, and start-up businesses. His practice has an emphasis on tax planning and preparation for corporations, partnerships and individuals...

Email Address: Dennis.Najjar@OSIBusinessServices.com

OSI Business Services, LLC.
512 Newark Pompton Turnpike
Pompton Plains, NJ 07444

Bill Gerber

Bill Gerber, Managing Member of OSI Business Services, LLC. has worked in the Financial Field for over 13 years. With a wide range of expertise in tax, bookkeeping, and business consulting, Bill is responsible for setting the company strategies, building its overall business, marketing, quality and successful delivery of its business process outsourcing (BPO) accounting & bookkeeping services to its clients.

Email Address:
Bill.Gerber@OSIBusinessServices.com

Toll-Free: 1-888-858-9919
Fax: 1-888-858-6919

Employees: Purple

Clients: Red

*Rollover Purple Dots To View Employees.*

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Selected Personnel

Kris, Alabama
Certifications: CPA (Certified Public Accountant)

Brenda, Maryland
Certifications: CPA (Certified Public Accountant)

Julie, Texas
Certifications: CPA (Certified Public Accountant), QuickBooks Pro Advisor, 2007,2008 Working on AIPB Certified Bookkeeper

Sean, Montana
Certifications: Enrolled Agent, Masters of Accounting, Accredited Tax Preparer, Accredited Tax Advisor, Member NAEA, Working on CPA

Kim, North Carolina
Certifications: QuickBooks Pro Advisor, 2006,2007,2008 Working on AIPB Certified Bookkeeper

Fran, North Carolina
Certifications: QuickBooks Pro Advisor 2004, 2005, 2006, 2007, 2008, Working on AIPB Certified Bookkeeper

Tricia, Michigan
Certifications: QuickBooks Pro Advisor, 2006,2007,2008 Working on AIPB Certified Bookkeeper

Dana W, Alabama
Certifications: QuickBooks Pro Advisor, 2006,2007,2008 Working on AIPB Certified Bookkeeper

Cheryl, Virginia
Certifications: QuickBooks Pro Advisor, 2006,2007,2008 Working on AIPB Certified Bookkeeper

Darlene, Arizona
Certifications: QuickBooks Pro Advisor, 2006, 2007 Working on AIPB Certified Bookkeeper

Wendy, Oklahoma
Certifications: Working on QuickBooks Pro Advisor, Working on AIPB Certified Bookkeeper

Kitti, Florida
Certifications: AIPB Certified Bookkeeper, QuickBooks Pro Advisor, 2006,2007,2008

Michelle, Missouri
Certifications: QuickBooks Pro Advisor, 2006,2007,2008 Working on Certified AIPB Bookkeeper

Jodi, Alabama
Certifications: Working on QuickBooks Pro Advisor, Working on AIPB Certified Bookkeeper

Tamarra, Idaho
Certifications: QuickBooks Pro Advisor, 2007, 2008 Working on AIPB Certified Bookkeeper

Sherry, Michigan
Certifications: QuickBooks Pro Advisor, 2007, 2008 Working on AIPB Certified Bookkeeper

Dana G, Idaho
Certifications: QuickBooks Pro Advisor, 2007, 2008 Working on AIPB Certified Bookkeeper

Rachel, Florida
Certifications: QuickBooks Pro Advisor, 2007, 2008 Working on AIPB Certified Bookkeeper

Nancy, Florida
Certifications: QuickBooks Pro Advisor, 2007, 2008 Working on AIPB Certified Bookkeeper

Alicia G, Florida
Certifications: QuickBooks Pro Advisor, 2007, 2008 Working on AIPB Certified Bookkeeper

Jill, New Mexico
Certifications: Working on QuickBooks Pro Advisor, Working on AIPB Certified Bookkeeper

Marcia, Georgia
Certifications: QuickBooks Pro Advisor, 2007, 2008 Working on AIPB Certified Bookkeeper

Alicia P, Georgia
Certifications: Working on QuickBooks Pro Advisor, Working on AIPB Certified Bookkeeper

Rebecca, Kansas
Certifications: Working on QuickBooks Pro Advisor, Working on AIPB Certified Bookkeeper

Debra, Arkansas
Certifications: Working on QuickBooks Pro Advisor, Working on AIPB Certified Bookkeeper

Dennis, New Jersey
Certifications: CPA and Managing Director of Client Services – Certified in MYOB

Jenny, New Jersey
Certifications: Office Manager

Bill, Connecticut
Certifications: Managing Director of Sales & Marketing

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