About Magone & Company, P.C.

Magone & Company, P.C. is an established U.S. CPA firm in New Jersey providing international tax services to businesses and individuals. We help foreign companies from Europe, Asia, Central America, and South America save money on taxes when they conduct business in the United States. Our team of CPAs and accountants are fluent in English, Spanish, Italian, and  Tagalog, making communication easy for all of our clients.

When you work with us, we'll explain the complex international tax laws and how they can impact your business. Then, we'll develop a plan to minimize taxes, increase profitability, and improve productivity. We serve business in a wide range of industries and we’re noted for our personalized financial guidance tailored to the needs of each client.

We also offer tax services for American expats and foreign nationals. With our assistance, your international employees will reduce their tax liabilities, stay in compliance with tax filing requirements, and avoid the likelihood of an audit.

Contact us today for a free initial consultation to learn about how our international tax advisory services will benefit your business. There’s no obligation, so give call 973-301-2300  now and ask for Nick Magone.

Northern New Jersey audit services

Nick Magone, CPA, CGMA, CFP®

Managing Partner

Nick Magone lends a global view to every engagement based on his 25+ years of audit and business advisory experience. A former "Big Four" professional, he founded and grew a local NJ CPA firm to 20+ employees and served as a partner in a top 25 NY-based regional firm prior to launching Magone & Company.

Magone & Company is the embodiment of Magone’s guiding professional principle — that numbers are just the beginning. “A financial statement or a tax return is just the start of the value we deliver. We use that information as a building block to help business owners and individuals achieve their growth goals.”

From technology start-ups to privately held companies and non-profits, Magone enjoys working with growth-oriented organizations that are passionate about what they do — and value the perspective of an equally passionate financial expert who can help accelerate their growth.

Over the course of his career, Magone has testified in U.S. Bankruptcy Court and served as an expert witness for damage claims and fraud. He is a frequent presenter to professional organizations in the U.S. and abroad, and a speaker for the American Institute of Certified Public Accountants (AICPA).

Magone is an active member of the AICPA, New Jersey Society of Certified Public Accountants and Financial Planning Association. A Seton Hall University alumnus, Magone is a Certified Public Accountant in New Jersey and New York and a Certified Financial Planner®. He was also recently awarded the designation of Chartered Global Management Accountant (CGMA) from the American Institute of CPAs (AICPA) and the Chartered Institute of Management Accountants (CIMA).

When not working on innovative client solutions, Magone enjoys golf, honing his Italian language skills, and cheering on the Seton Hall Pirates basketball team with his family. He currently serves on Seton Hall University’s Presidential and Accounting Advisory Committees.

Karl C. Callejas, CPA, CGMA

Karl C. Callejas, CPA, CGMA

Partner, Assurance Services

With 14 years of audit experience, Karl Callejas oversees the day-to-day management of the audit process as well as the supervision of on-site staff. He has planned and coordinated countless engagements, including statutory financial audits, M&A due diligence reviews, business process analysis, preparation of bank compliance manuals, and internal control reviews.

During his tenure at “Big Four” firms Ernst & Young and KPMG, he held audit management positions, honing his ability to work with internal and external teams to resolve issues effectively while managing and executing audit engagements for a variety of clients around the world.

Callejas’ industry experience includes non-profit organizations and companies in the field of banking and financial services, telecommunications, consumer products, manufacturing, real estate, pharmaceutical, power generation and distribution, film distribution and construction. His expertise also includes working with start-up companies, bringing to the table years of audit experience that allow him to delve into issues such as research and development, employee stock option plans and valuation analysis. He says, "Sitting down with a group of individuals and looking boldly at all the possibilities gives me a sense of satisfaction and encourages me to think out of the box. I look around and what I see is the future."

Callejas was recently awarded the designation of Chartered Global Management Accountant (CGMA) from the American Institute of CPAs (AICPA) and the Chartered Institute of Management Accountants (CIMA). He is licensed as a CPA in both New Jersey and Pennsylvania.

A self-professed audiophile minus the expensive equipment, Callejas resides in Springfield, NJ, with his wife and two children.

Alfred Mahler, CPA

Al Mahler
Partner, Tax, Estates and Trusts

Alfred Mahler brings more than 40 years of tax, accounting and business advisory experience to clients of the firm. With a keen sense of clients’ needs, and his warm personal touch, Alfred successfully grew his practice, specializing in working with closely held businesses and professional service firms, as well as individual and trust and estate taxes and elder financial oversight.

Alfred began his career with a small, Millburn-based firm, swiftly rising to become a partner. After his firm’s merger with Eisner, he served as a partner in their New Jersey office. About 20 years ago, he left to open his own firm, A. Mahler & Associates.

“Providing close personal attention to all my clients, and affording one-on-one assistance to elders needing help handling their finances, has fostered the respect and concern I have for the future welfare of my clients and their families.”

Alfred has served as a long-term board member for several not-for-profit foundations. He has also been on the board of a company supplying medical rehabilitative devices. Alfred is a graduate of Bronx High School of Science and Manhattan College.

A long-time resident of Livingston, Alfred and his wife Jeanette recently moved to Whippany. One of their bigger challenges these days is keeping up with their three adult children who live outside of New Jersey.

John Hemmendinger

John S. Hemmendinger, CPA, CGMA


John Hemmendinger brings four decades of accounting experience to the Magone & Company team. From 2003-2020, he led Hemmendinger + Company, which served closely held businesses in industries including automotive services, manufacturing, professional services, real estate management, property development and nonprofit organizations.

A member of the American Institute of Certified Public Accountants and the New Jersey Society of Certified Public Accountants, Hemmendinger has held leadership roles in a number of local organizations, serving on the board of the Morris Museum from 2000 to 2016. He also is a former board chair of Consumer Credit Counseling Service of NJ, and former president and chair of the Pastime Club, a nonprofit civic and fraternal organization located in Mendham, NJ.