Valuable Info

Authorities in our field

At John Duffy Energy Services, we’ve been experts in energy and in providing world-class customer service for more than a century now. Our customers, throughout the New Jersey area, have come to regard us as authorities in our field, which is why so many customers come to us with questions and general inquiries about energy consumption, fueling procedures, and the best practices for keeping energy or fuel costs low.

Whether you want to learn more about federal tax credit opportunities or are simply curious about energy saving tips, we wish to provide you with all the valuable info and resources you need. Explore some of our online resources, and, if you have any further questions, contact a John Duffy Energy Services representative today!

Contact Us

Office Address
465 Mulberry Street, Newark, NJ 07114

Mailing Address
P.O. Box 5610, Newark, NJ 07105




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