Contact Us / Visit Us

Dayton T. Brown, Inc. is conveniently located less than 5 mins from MacArthur Airport on Long Island, in Islip, NY. We have several great hotels and restaurants around our facility to help make your visit more pleasant. You will find that Long Island is a wonderful destination, offering something for everyone.

We are home to famous golf-courses and baseball stadiums, world-class beaches, wineries, arts and entertainment, gourmet restaurants, and some amazing shopping! In addition, Manhattan is right at our doorstep. You can catch a train from near our office that will take you straight into Manhattan in less than an hour.

So, have some fun while your visiting us. Please check out our Local Activities and Attractions,  Local Amenities and Local Area listings for a lot of helpful information. Enjoy!

Engineering / Testing Services

Phone: 631.589.6300

Toll-Free: 800.837.8456

Fax: 631.589.3648

Email: contactus@dtbtest.com

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General Information

Phone: 800.232.6300

Fax: 631.589.0046

Email: info@dtb.com

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Mailing Address

Dayton T. Brown Inc.
1175 Church Street
Bohemia, New York 11716 USA

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Security Information / Visit Procedures

Contact the DTB Security Manager, Ms. Carolyn Long:

Phone: 631.244.6431

Email: clong@dtbtest.com

Important: If you are NOT a U.S. citizen, please fill our online Non-US Citizen Visit Request Form.

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