From 1988 till 1989 and from 1990 till 1993 John Mather is the Head of the Infrared Astrophysics Branch at Goddard Space Flight Center (GSFC).

From 2007 till 2008 John Mather takes up the position of Chief Scientist of the Science Mission Directorate of NASA.

After doing a summer job at the Lawrence Berkeley Laboratory, John Mather decides to go to Berkeley. He gets a fellowship from the National Science Foundation. His graduation thesis treats the design of a balloon instrument, which can measure the Cosmic Microwave Background Radiation. He does his doctorate with a 4.0 grade point average.

From 1974 till 1976 John Mather works as a postdoctoral fellow on the Cosmic Background Explorer (COBE) satellite in the Goddard Institute for Space Studies, a department of NASA. COBE is an project with more then 1,000 co-workers and John Mather is responsible for the coordination of the research-process.

John Mather's family moves to an Agricultural Experiment Station in Sussex County. Mather visits the Wantage Consolidated Elementary School. At the age of six Mather is interested in mathematics and natural science. Supported by his parents, he visits several summer camps with science programs and joins science fair projects.

John Mather and Jane Hauser get married in November 1980. They met in New York in 1974. She is a ballet teacher and also interested in science, that's why Mather is very impressed by her.

John Mather becomes a Senior Astrophysicist and a Goddard Fellow at the NASA's Goddard Space Flight Center in 1993.

From 1964 till 1968 John Mather studies physics at the Swarthmore College. He is also interested in humanities and arts but withdraws from these fields soon.

Working as a Study Scientist, John Mather and his team develop a concept for the NASA-project COBE. One of his team-member is George Smoot from the University of California, Berkeley, with whom John Mather is awarded the Nobel Prize in 2006. Unusual and new for this kind of research is the close collaboration between scientists and engineers. Due to Mather, this is an important factor for the significant progess they make.

John Cromwell Mather is born in Roanoke, Virgina to his parents Robert, a geneticist and Martha Cromwell, a teacher of French at high school. He has one sister, Janet Mather.

John Mather is awarded with the Nobel Prize in Physics together with George Smoot “for their discovery of the blackbody form and anisotropy of the cosmic microwave background radiation”. The measurements of this are arranged by the in 1989 launched COBE satellite.

The COBE team present that the spectrum of radiation is remained of the Big Bang. They demonstrate this by marking primordial hot and cold spots in cosmic microwave background radiation.

John Mather becomes an Adjunct Professor of physics at the University of Maryland.

Since 1995 John Mather works on the James Webb Space Telescope at NASA. At first as a Study Scientist and later as a Senior Project Scientist.

In 1989 John Mather becomes the Senior Scientist at the GSFC.

During his High School years, John Mathers participates in summer schools. At the age of 16 he takes part in a summer physics program at Cornell University, where he gets the first contact with quantum mechanics and cosmology. Furthermore he wins a statewide physics contest and feels confident enough to consider a career in science.