Zakariya has presented numerous workshops and lectures on Islamic calligraphy, and his calligraphy has been exhibited widely. In the United States, his work has been shown at the Smithsonian Institution’s Renwick Gallery, the S. Dillon Ripley Center, the Klutznick National Jewish Museum in Washington, D.C., the Metropolitan Museum of Art in New York, and the Walters Gallery in Baltimore. Abroad, he has participated in exhibitions and symposia in Turkey, Kuwait, Iraq, Qatar, Bahrain, Oman, Abu Dhabi, and Saudi Arabia.

Zakariya is also the author of numerous articles and monographs, including Music for the Eyes, published by the Metropolitan Museum of Art and the Los Angeles Museum of Art in conjunction with a 1998-99 exhibit of Ottoman calligraphy from the Sakip Sabanci collection. He has also translated from the Turkish exhibition catalogue, Letters in Gold, by Ugur Derman, as well as Mr. Derman’s Art of Calligraphy in the Islamic Heritage (IRCICA, 1998). Zakariya is perhaps best known for his Eid U.S. postage stamp, which has brought his work into many homes in America.

A master woodworker, engraver, and machinist, Zakariya also designs and constructs functioning examples of antique-style horological and scientific instruments, examples of which are in the collections of the Aramco Science Museum in Saudi Arabia, the National Museum of Qatar, the Time Museum in Rockford, Illinois, and the Adler Planetarium in Chicago. His woodturning has been exhibited at the American Craft Museum in New York and his engraved astrolabes at the Ornamental Metal Museum in Memphis, Tennessee.