Born in Terra Bella, California, Halbert received an Artium Baccalaureus degree from the University of California, Berkeley in 1924 and a Juris Doctor from the UC Berkeley School of Law in 1927.
He was a chief deputy district attorney of Stanislaus County, California from 1944 to 1949, and district attorney of that county in 1949, until he became a Judge of the Superior Court of California, from 1949 to 1954.
[1] On August 19, 1954, Halbert was nominated by President Dwight D. Eisenhower to a seat on the United States District Court for the Northern District of California vacated by Judge Dal Millington Lemmon.
On September 18, 1966, he was reassigned by operation of law to the United States District Court for the Eastern District of California, to a new seat authorized by 80 Stat.
He assumed senior status on September 30, 1969, serving in that capacity until his death on May 31, 1991, in San Rafael, California.