Larry Walter

Larry Walter, of Clear Lake TX, passed away on September 29, 2026, at the age of 82. A devoted husband, father, grandfather, Larry was also an accomplished NASA engineer whose distinguished career spanned more than four decades of American space exploration.

Born January 7, 1944, Larry was the son of Raymond and Ethel (Nelie) Walter. Raised in El Dorado, Kansas, where his father owned a local flower shop (named Walter’s Flower Shop) he graduated from El Dorado High School in 1962. He continued his education at the University of Oklahoma earning a degree in aerospace engineering.

In 1967, Larry began his career with the National Aeronautics and Space Administration (NASA) at the Johnson Space Center in Houston, Texas. That same year, on August 19, he married Cheryl Sommerfrucht, beginning a partnership that would endure for more than 59 years.

Larry joined NASA during one of the most important periods in the history of human space exploration. He started at JSC (Johnson Space Center) in January 1967 and continued with NASA, at JSC for his entire career. Larry’s first assignment with NASA was working on the Lunar Landing simulations, specifically the calculus and control allowing the Lunar Module to avoid problematic craters on the lunar surface. He was also deeply involved in the simulation work used to test the abort guidance software on the Lunar Module.

Continuing onward at NASA, Larry was involved in the simulation work that would eventually establish ‘feasibility’ of the Space Shuttle’s landing and approach mechanisms. Larry would eventually move fully into SAIL (Shuttle Avionics Integration Laboratory) as a NASA Test Director involved with Space Shuttle Avionics. Later on, Larry would continue to work on multiple Shuttle-related projections, spanning countless missions..including the analysis and use of robotic manipulators (ala the Shuttle Remote Manipulator System (SRMS))..

In the later third of his NASA career, Larry continued to focus on numerous Shuttle and ISS-related missions as part of the Software, Robotics and Simulation Division (ER). This includes early and extensive work with the MAGIK software (Manipulator Analysis Graphical Interactive Kinematic).

Larry continued onward with the Automation, Robotics, and Simulation Division (Flight Systems Branch) up to his retirement from NASA.

Larry’s expertise was particularly important during some of NASA’s most challenging moments. Following the tragic loss of Space Shuttle Challenger in 1986, he participated in the technical response to the disaster. His career also extended through the Columbia tragedy in 2003 and NASA’s subsequent efforts to advance the safety and future of human spaceflight.

Throughout his career, Larry received numerous honors recognizing his dedication and technical contributions. Among these was NASA’s prestigious Silver Snoopy Award, a special recognition presented by astronauts to individuals whose work contributes to flight safety and mission success. He was also recognized multiple times through NASA’s Manned Flight Awareness program, amongst other honours.

Larry retired from NASA in 2009, after nearly 42 years of service. His professional life spanned an extraordinary period of space-exploration history, from the race to the Moon to the establishment of a permanent human presence aboard the International Space Station.

In 2011, Larry and wife Cheryl finally witnessed a successful Space Shuttle launch together when Space Shuttle Discovery lifted off on mission STS-133 from Kennedy Space Center. It was a particularly meaningful experience for someone who had devoted so much of his life to the Space Shuttle program.

Outside his professional accomplishments, Larry enjoyed a lifelong fascination with trains, particularly Lionel model trains. Other interests included computers, music, (in his younger days) playing tennis.

Above all, Larry was a devoted family man. He shared more than five decades of marriage with Cheryl and took great pride in his son, grandchildren, and extended family.

Larry was preceded in death by his parents, Raymond and Ethel Walter, his sister JoAnn Stackley, and his brother Edwin Walter.

He is survived by his beloved wife, Cheryl Walter; his son, Jim Walter, and daughter-in-law, Dannah Walter; his grandchildren, Parker and Jameson Walter; and extended family members in Kansas, Houston, Colorado, and beyond.

Larry leaves a legacy that reaches far beyond his family and friends. Through decades of dedicated service to NASA, he helped support some of our country’s greatest achievements in space exploration.

He will be remembered with love by his family, with respect by those who worked alongside him, and with joy by those who shared a laugh or fun conversation with him.