Trinet Share: Professional & Personnel Services Trinet Visit Website Request Info 1305 Walt Whitman Rd Suite 210 Melville, New York 11747 6312355196 About Map About Trinet is the leading PEO company for small to mid-size companies. Trinet offers fortune 500 benefits at a reasonable cost along with risk mitigation and savings on workers compensation. What's Nearby? Distance: 5 10 15 20 25 50 mi.