He enlisted in the United States Navy and served a tour of duty during the Vietnam War. While in Vietnam, he attempted to commit suicide by swimming out to sea, but changed his mind more than a mile out.
Venter began his academic career at a community college, College of San Mateo in California. He received his bachelor's degree in biochemistry in 1972, and his Ph.D. in physiology and pharmacology in 1975 — both from the University of California, San Diego. In San Diego, he married former Ph.D. candidate, Barbara Rae. After working as a professor at the State University of New York at Buffalo, he joined the National Institutes of Health in 1984. In Buffalo, he divorced Dr. Rae-Venter and married his student, Claire M. Fraser, and remained married to Ms. Fraser until 2005.
While at NIH, Venter learned of a technique for rapidly identifying all of the mRNAs present in a cell, and began to use it to identify human brain genes. The short cDNA sequence fragments discovered by this method are called expressed sequence tags, or ESTs, a name coined by Anthony Kerlavage at The Institute for Genomic Research. In a controversial court case, Venter tried to patent these gene fragments and lost the case.
Despite their differing motivations, Venter and rival scientist Francis Collins of the National Institute of Health jointly made the announcement of the mapping of the human genome in 2000, along with US President Bill Clinton. Venter and Collins thus shared an award for "Biography of the Year" from A&E Network.
Venter appeared in the "Evolution" episode of the documentary television series Understanding.
On May 16, 2004 Venter gave the commencement speech at Boston University.
On May 10, 2007, Venter was awarded an honorary doctorate from Arizona State University. He was on the 2007 Time 100 most influential people in the world list made by Time magazine.
On September 4, 2007, a team led by Venter published the first complete (six-billion-letter) genome of an individual human — Venter's own DNA sequence.
On BBC News on October 22, 2007, when asked about his religious view he replied that he thought that a true scientist could not believe in supernatural explanations.
On December 4, 2007, Venter gave the Dimbleby lecture for the BBC in London. He outlined his current work and future developments in genetics.
In February 2008, he gave a speech about his current work at the TED conference. The video can be seen online and downloaded.
The Human Reference (HuRef) Genome Browser is a Web application (http://huref.jcvi.org) for the navigation and analysis of the Venter's recently published genome.
The HuRef database consists of approximately 32 million DNA reads sequenced using Sanger methods, assembled into 4,528 scaffolds and 4.1 million DNA variations identified by genome analysis. These variants include Single Nucleotide Polymorphisms (SNPs), block substitutions, short and large indels, structural variants like insertion, deletions, inversions and copy number changes.
The browser enables scientists to navigate the HuRef genome assembly and sequence variations, and to compare it with the NCBI human build 36 assembly in the context of the NCBI and Ensembl annotations. The browser provides a comparative view between NCBI and HuRef consensus sequences, the sequence multi-alignment of the HuRef assembly, Ensembl and dbSNP annotations, HuRef variants, and the underlying variant evidence and functional analysis. The interface also represents the haplotype blocks from which diploid genome sequence can be inferred and the relation of variants to gene annotations. The display of variants and gene annotations are linked to external public resources including dbSNP, Ensembl , Online Mendelian Inheritance in Man (OMIM) and Gene Ontology (GO).
Users can search the HuRef genome using HUGO gene names, Ensembl and dbSNP identifiers, HuRef contig or scaffold locations, or NCBI chromosome locations. Users can then easily and quickly browse any genomic region via the simple and intuitive pan and zoom controls; furthermore relevant data in specific loci can be exported for further analysis.
Furthermore it suggests that one of the main purposes for creating synthetic bacteria would be to reduce the dependence on fossil fuels.