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Christopher Cassidy

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2004 NASA Group


Total EVAs

Space agency

Captain, USN

Christopher Cassidy

First space flight

Time in space
181 days, 23 hours


Christopher Cassidy Astronaut Biography Christopher Cassidy

Christopher John Cassidy January 4, 1970 (age 54) Salem, Massachusetts, U.S. (

Space missions
STS-127, Expedition 35, Soyuz TMA-08M

Massachusetts Institute of Technology

Similar People
Alexander Misurkin, Pavel Vinogradov, Thomas Marshburn, Luca Parmitano, Karen L Nyberg


Other occupation
United States Navy SEALs

Astronaut at a glance christopher cassidy

Christopher John "Chris" Cassidy (born January 4, 1970, in Salem, Massachusetts) is a NASA astronaut and United States Navy SEAL. Chris Cassidy achieved the rank of Captain in the U.S. Navy. He was the Chief of the Astronaut Office at NASA from July 2015 until June 2017.


Cassidy attended York High School, in York, Maine. He then graduated from the Naval Academy Preparatory School in Newport, Rhode Island, in 1989. He received a Bachelor of Science degree in Mathematics from the United States Naval Academy in 1993 and a Master of Science degree in Ocean Engineering from MIT in 2000. While in the Navy, Cassidy passed BUD/S and became a Navy SEAL. While a SEAL he served several tours of duty supporting the fight in the War on Terror. His first spaceflight was on Space Shuttle mission STS-127, and his second was as a flight engineer for Expedition 35/36, launched aboard Soyuz TMA-08M. He was in space between July 15–31, 2009 and March 28 – September 10, 2013. Cassidy has worked as a CAPCOM for both International Space Station and Space Shuttle missions in the past.

Military experience

Christopher Cassidy wwwspacefactsdebiosportraitshiastronautscas

Cassidy graduated from BUD/S Class 192. He served for ten years as a member of the Navy SEALs. His specializations in military tactics include long range special reconnaissance (vehicular and foot patrols), direct action building assaults, non-compliant ship-boardings, desert reconnaissance patrols, combat diving, underwater explosives, and a variety of air operations, including parachuting, fast roping, and rappelling. He made four six-month deployments: two to Afghanistan, and two to the Mediterranean Sea. Cassidy served as Executive Officer and Operations Officer of Special Boat Team 20 in Norfolk, Virginia, and SEAL Platoon Commander at SEAL Team 3 in Coronado, California. He deployed to the Afghanistan region two weeks after the September 11 attacks. He served as Ground Assault Force Commander for international and U.S.-only combat missions in Afghanistan. Cassidy led two months of non-compliant ship-boardings in the Northern Persian Gulf. Cassidy was also a SEAL Delivery Vehicle (SDV) Platoon Commander at SEAL Delivery Vehicle Team Two in Norfolk. He accumulated over 200 hours underwater as Pilot / Navigator / Mission Commander of a two-man flooded submersible (SDV), which is launched and recovered from a host-ship submarine. He also served as Dry Deck Shelter Platoon Commander at SEAL Delivery Vehicle Team Two in Norfolk. Cassidy volunteered for and completed a week-long, 180-mile charity kayak paddle from Norfolk, Virginia to Washington, D.C. to raise money and awareness for the Special Operations Warrior Foundation.

NASA career

Christopher Cassidy NASA 2004 Astronaut Candidate

Cassidy was selected as an astronaut candidate by NASA in May 2004. In February 2006 he completed Astronaut Candidate Training, which included scientific and technical briefings, intensive instruction in Space Shuttle and International Space Station systems, physiological training, T-38 Talon flight training, and water and wilderness survival training. Completion of this initial training qualified him for various technical assignments within the Astronaut Office and future flight assignment as a mission specialist.


Christopher Cassidy Navy SEALs Invade Outer Space SOFREP

He was a Mission Specialist on STS-127, and performed a total of three spacewalks to help install and complete components of the Japanese Experiment Module.

Expedition 35/36

Christopher Cassidy Take a Tour of the Space Station With Astronaut Chris

Cassidy was assigned to the Expedition 35 crew as a flight engineer and flew to the ISS aboard Soyuz TMA-08M (US designation: 34S), which launched on March 28, 2013. On May 11, 2013, Cassidy and Thomas Marshburn performed an unplanned spacewalk to replace a pump controller box suspected to be the source of an ammonia coolant leak.

Christopher Cassidy Ultimate Wednesday Warfighter Navy Cmdr Chris Cassidy

Cassidy participated in two US spacewalks from the ISS in June/July 2013. On July 16, 2013, he was joined by Luca Parmitano on a spacewalk. The EVA was cut short when Parmitano reported water floating behind his head inside his helmet. During the EVA, Cassidy took his space selfie. That photo became one of the best selfies of 2013 listed by many news sites.

Chief of the Astronaut Office

Cassidy was named Chief of the Astronaut Office at NASA in July 2015, succeeding Robert L. Behnken.

On June 2, 2017, Cassidy was replaced by Patrick G. Forrester as Chief of the Astronaut Office and was returned to normal flight status.

Awards and honors

Cassidy is an honor graduate of Basic Underwater Demolition/SEAL training (BUD/S) Class 192. He was awarded the Bronze Star with "V" device and the Presidential Unit Citation for leading a 9-day operation at the Zhawar Kili cave complex – a national priority objective directly on the Afghan/Pakistan border during Operation Enduring Freedom. Cassidy was a guest speaker at the USNA Combat Leadership Seminar (2003 & 2004). He was awarded a second Bronze Star for combat leadership service in 2004 during Operation Enduring Freedom in Afghanistan.

Chris Cassidy is also the 500th person in space. He achieved this by being the designated crew member by the rest of his crew mates, during the STS-127 mission. He is also the second SEAL to fly in space following William Shepherd, a veteran of four prior missions.


Christopher Cassidy Wikipedia

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