NASA, Univac, Xerox, CSC, Booz Allen and Lockheed McAfee was employed as a programmer by
NASA from 1968 to 1970. From there, he went to
Univac as a software designer, and later to
Xerox as an
operating system architect. In 1978, he joined
Computer Sciences Corporation as a software consultant. He worked for consulting firm
Booz Allen Hamilton from 1980 to 1982. In 1986, while employed by
Lockheed, he read about the
Brain computer virus made for the PC, and he found it terrifying. In 1994 he sold his remaining stake in the company. In January 2014, Intel announced that McAfee-related products would be marketed as Intel Security. McAfee expressed his pleasure at the name change, saying, "I am now everlastingly grateful to Intel for freeing me from this terrible association with the worst software on the planet." The business was soon de-merged from Intel, once more under the McAfee name.
PowWow, QuoromEx, MGT and more McAfee founded the company
Tribal Voice in 1994, which developed one of the first instant messaging programs,
PowWow. In 2000, he invested in and joined the board of directors of
Zone Labs, makers of
firewall software, prior to its acquisition by
Check Point Software in 2003. In the 2000s McAfee invested in and advertised ultra-light flights, which he marketed as
aerotrekking. In 2000 he bought a large property in Colorado and opened a yoga and meditation retreat there. In the following year he authored four books on yoga and meditation. In August 2009
The New York Times reported that McAfee's personal fortune had declined to $4 million from a peak of $100 million due to the effect of the
2008 financial crisis on his investments. McAfee relocated to
Belize in 2009, buying a beachfront property on the island of
Ambergris Caye and later also some property near the mainland village of
Carmelita, where he surrounded himself with a large group of armed security guards. In 2009, McAfee was interviewed in Belize for the
CNBC special
The Bubble Decade, in which it was reported that he had invested in and/or built many mansions in the USA that went unsold when the 2007 global recession hit. The report also discussed his quest to raise plants for possible medicinal uses on his land in Belize. In February 2010, McAfee and biologist Allison Adonizio started the company QuorumEx, headquartered in Belize, which aimed to produce herbal
antibiotics that disrupt
quorum sensing in bacteria. In June 2013, McAfee uploaded a parody video titled
How to Uninstall McAfee Antivirus onto his
YouTube channel. In it, he critiques the antivirus software while snorting white powder and being stripped by scantily clad women. It received ten million views. He told
Reuters the video was meant to ridicule the media's negative coverage of him. A spokesman for McAfee Inc. called the video's statements "ludicrous". Also in 2013, McAfee founded Future Tense Central, which aimed to produce a secure computer network device called the D-Central. By 2016, it was also an
incubator. In April 2014, it was renamed DCentral 1, and an
Android version was released for free on
Google Play. 2014 At the
DEF CON conference in Las Vegas in August 2014, McAfee warned people not to use smartphones, suggesting
apps are used to spy on clueless consumers who do not read privacy user agreements. In January 2016, he became the chief evangelist for security startup Everykey. In February 2016, McAfee publicly volunteered to
decrypt the iPhone used by
Rizwan Farook and Tashfeen Malik in San Bernardino, avoiding the need for
Apple to build a
backdoor. He later admitted that his claims regarding the ease of cracking the phone were a publicity stunt, while still asserting its possibility.
MGT Capital Investments (2016–2018) In May 2016, McAfee was appointed chairman and
CEO of MGT Capital Investments, a technology
holding company. It initially said it would rename itself John McAfee Global Technologies, although this plan was abandoned due to a dispute with Intel over rights to the "McAfee" name. He changed MGT's focus from
social gaming to cybersecurity, saying "anti-virus software is dead, it no longer works," and that the new goal was to stop hackers before they could enter a network. To lead this pivot, McAfee recruited a technical team from Ontario, Canada, including **Robert Rogers** and **Joshua Kowalchuk**, whose firm **Ontario High Speed Inc.** provided the intellectual property for the company's new roadmap. The team developed two main products: **Sentinel**, a hardware-based "honeypot" meant to detect intruders inside a network, and **E-tagged**, a device for tracking mobile phones and other 802.11 devices. E-tagged used passive **ESSID probe request** monitoring to track the physical movement of devices. By matching these wireless signals with CCTV footage, the system could identify and track specific individuals or groups based on the unique network names saved on their phones. Soon after joining MGT, McAfee claimed his team exploited a flaw in the Android system to read encrypted WhatsApp messages.
Gizmodo later reported he had sent reporters phones with malware already on them to make the hack work. McAfee replied that while the phones had malware, the story was about how it got there through a "serious flaw in the Android architecture." In late 2016, the
NYSE MKT refused to list the shares MGT needed to complete its purchase of technologies like **D-Vasive**, effectively stopping the deal. Consequently, the E-tagged project was sidelined to focus on the Sentinel rollout and **Bitcoin mining**, which McAfee believed was necessary for cybersecurity expertise. A separate project, **ClearSkies**, was eventually abandoned and labeled "vaporware" after it never materialized. McAfee stepped down as CEO in August 2017 to serve as "chief cybersecurity visionary" before leaving MGT in January 2018 to focus on cryptocurrencies. Both sides described the split as amicable. On 13 August 2018, McAfee took a position of CEO with Luxcore, a cryptocurrency company focused on enterprise solutions. ==Politics==