| Name | Phone | Category |
| Jaburg Wilk | 602.248.1000 | Legal Services |
| Jack Nadel International | 480.389.0257 | Marketing Communications and Public Relations |
| JBA International | 626.204.6900 | IT Services & Solutions |
| JBN Associates | 480.344.5524 | Human Resources and Employment |
| JCurve | 602.792.6115 | Other Technology-Based Industrial Services |
| JDA Software Group Inc | 480.308.3000 | Computer Software |
| Jennings, Strouss & Salmon, PLC | 602.262.5911 | Legal Services |
| JFS Embedded Solutions, LLC | 480.352.0871 | Other Technology-Based Industrial Services |
| Jibwa LLC | 623.252.1907 | Computer Software |
| Jive Software | 480.575.0498 | Computer Software |
| Jobing.com | 602.200.6800 | Human Resources and Employment |
| John Driscoll & Company Inc. | 602.957.7155 | Financial and Banking Services, Insurance Services |
| Johnson & Johnson | 480.314.4422 | Medical and Biotechnology |
| JPMorgan Chase Bank | 614.248.5800 | Financial and Banking Services |
| Junior Achievement of Arizona Inc | 480.219.0216 | NonProfit Associations |