Mark Greaney

Mark Greaney is an American novelist renowned for his Gray Man series of action thriller novels, which center on the rogue assassin and former CIA operative Court Gentry, with the debut novel The Gray Man published in 2009 becoming a national bestseller and later adapted into a 2022 Netflix film starring Ryan Gosling . He has authored or co-authored over 20 novels, including seven in the Tom Clancy universe, and his works have been translated into nearly two dozen languages and frequently top the New York Times bestseller lists.

Greaney grew up in Memphis, Tennessee, where he currently resides with his wife Allison, her three children, and their four dogs. He earned a double major in international relations and political science from the University of Memphis in 1992, after beginning his writing journey in 1990 while still a student, though it took 15 years to complete his first book, which was published in 2009. Prior to focusing full-time on writing, he worked in international business, including a role at Medtronic.

Greaney's career gained significant momentum through his collaborations with Tom Clancy , co-authoring the final three novels in Clancy's Jack Ryan series— Locked On (2011), Threat Vector (2012), and Command Authority (2013)—before Clancy's death, and subsequently writing four more Jack Ryan thrillers such as Support and Defend (2014). His research-intensive approach has involved travels to over 35 countries, visits to the Pentagon and military bases, and training in firearms, battlefield medicine , and combative tactics with military and law enforcement experts.

Beyond the Gray Man series, which includes 14 installments as of 2025 with the latest, Midnight Black , released in February, Greaney has co-authored military thrillers like the New York Times bestseller Red Metal (2019) with Lt. Col. Hunter R. Rawlings IV and launched the Joshua Duffy series with Armored (2022), followed by Sentinel (2024). His debut novel's adaptation marked a major milestone, highlighting the global appeal of his high-stakes espionage narratives.

Mark Greaney was born on October 25, 1967, in Memphis, Tennessee. He is the son of Ed Greaney, a longtime television executive who worked at WMC-TV, Memphis's NBC affiliate, for over 50 years, rising from cameraman to managing editor; the station's newsroom is named in his father's honor. Ed Greaney, a World War II combat veteran, significantly influenced his son's early worldview by sharing war stories and gifting him a Luger pistol captured from a Nazi officer, which sparked Greaney's fascination with military history.

Greaney grew up in Memphis, where the city's culture and his family's storytelling tradition shaped his formative years. His father, a journalism legend in the region, encouraged Greaney's interest in thrillers by reading Tom Clancy novels alongside him and providing editorial feedback on Greaney's early writing attempts, even though Ed passed away before his son's professional debut. These experiences in Memphis fostered Greaney's passion for narrative-driven stories, particularly those involving espionage and military themes, laying the groundwork for his later pursuits.

Greaney enrolled at Memphis State University (now the University of Memphis ) in 1985, pursuing studies in political science before switching to a double major in political science and international relations after two years. He thrived in the smaller, discussion-based classes on global affairs, which were led by engaging professors and allowed for in-depth exploration of international politics and history . This coursework provided a foundational understanding of geopolitical dynamics, directly informing the realistic depictions of espionage , CIA operations, and global conflicts in his thriller novels.

Balancing academics with full-time employment in jobs such as retail and food service, Greaney extended his studies over seven years, taking occasional semesters off before graduating in 1992.