Doerr joined Intel Corporation in 1974 just as the firm was developing the 8080 8-bit microprocessor. He eventually became one of Intel's most successful salespeople. He also holds several patents for memory devices. In 1980, Doerr was offered a job with Kleiner Perkins. Intel president Andrew Grove told him, "John, venture capital, that's not a real job. It's like being a real estate agent." He joined Kleiner Perkins that year, and since then has directed the distribution of venture capital funding to some of the most successful technology companies in the world including Compaq, Netscape, Symantec, Sun Microsystems, drugstore.com, Amazon.com, Intuit, Macromedia, and Google.