[1] He has contributed numerous concepts and techniques forming the foundations of modern practice in software engineering and applications design and development.

In 2001 he received the Platinum Award of Excellence (first place), Performance-Centered Design Competition 2001: Siemens AG, STEP-7 Lite.

He is the 2009 recipient of the Stevens Award for "outstanding contributions to the literature or practice of methods for software and systems development."

His contributions to the practice of software development began in 1968 with his pioneering work in "Modular programming" concepts.

While still an undergraduate at MIT he began work on what was to become structured design, formed his first consulting company, and taught in a postgraduate program at the University of Pennsylvania Wharton School.

This is a third significant contribution to the field, being both well used in professional practice and the subject of academic study, and taught in a number of human-computer interface courses and universities around the world.

From 1973 to 1980 he was an assistant clinical professor of psychiatry in the Tufts University School of Medicine training family therapists and supervising trainees at Boston State Hospital.

[9] US Patents: 7010753 Anticipating drop acceptance indication; 7055105 Drop-enabled tabbed dialog; 8161026 Inexact date entry Although he played piano, saxophone, and violin as a child, Constantine gave up instrumental performance for singing.

He sang with the award-winning Burtones ensemble while a student at MIT, is a twelve-year veteran and alum of the semi-professional Zamir Chorale of Boston, and is a member of the Zachor Choral Ensemble, a Boston-based group dedicated to keeping alive the memory of the Holocaust through music.

His choral work, “No Hidden Meanings,” based on a text by psychologist Sheldon Kopp, was commissioned by the American Humanist Association and premiered at MIT’s Kresge Auditorium, 20 June 1982.

His choral setting of the traditional Shehechiyanu blessing was premiered April 18, 2010 by HaShirim at the groundbreaking for Temple Ahavat Achim in Gloucester, Massachusetts.

[12] Constantine, an active (professional) member of the Science Fiction and Fantasy Writers of America, is the author of numerous short stories, mostly published under several pseudonyms.

He edited Infinite Loop (Miller Freeman Books, 1993), an anthology of science fiction by writers in the computer field described in the Midwest Book Review[13] as "quite simply one of the best anthologies to appear in recent years.” Writing under the pen name Lior Samson,[14] Constantine is the author of several critically acclaimed[15] political thrillers, including Bashert, The Dome, Web Games, The Rosen Singularity, Chipset, Gasline, and Flight Track.