Kfir was born and raised in Italy, and in 1971 moved to Israel. After serving as an officer in the Israeli army he completed his PhD studies in chemical engineering. He works as a patent attorney and is a senior partner in a firm established by his great-grandfather. He lives in Omer, Israel, with his full-time partner, Esther, and their four children, Michal, Lilach, Tamar and Yonatan.

Kfir has published extensively in the professional and general press over the years. For almost four years he wrote a weekly "Patents" column in Globes (Israel’s financial newspaper). His non-fiction book, THE WORLD OF PATENTS, (a not-so-boring tale of what patents are about, in Hebrew) was published in 2002 by Globes Press. He is the author of several short stories. His first novel, CROSSING THE MEADOW was published by Echelon Press (October 2003) and was voted "BEST HORROR NOVEL" in the 2003 Preditors & Editors Readers Poll. Kfir is an HWA (Horror Writers Association) and ITW (International Thriller Writers) member and also serves on the editorial board of The Harrow as Anthology Editor. His new novel, THE ODYSSEY GENE, was published by Echelon Press (July 2006) and was a finalist in the Indie Excellence 2007 Book Awards. He is currently working on a number of new projects.