Justin G. Castillo is a partner in the firm of Levine, Blaszak, Block & Boothby, LLP ("LB3"), where he negotiates agreements for telecommunications and technology-related products and services. He also represents customers in disputes with carriers.

His work as a telecommunications and technology lawyer includes: * Counseling clients on the strategic and tactical aspects of vendor management and procurement;
* Assisting in the drafting of RFPs and RFIs;
* Negotiating contracts (including MSAs, service schedules and SLAs) for voice and data services, including wireless, interexchange, and SIP trunking services;
* Counseling clients on telecom-related issues, including telecom expense management (TEM);
* Negotiating agreements for IT products and services, including cloud services; outsourcing; software licensing; privacy; security services; and PCI Assessments;
* Drafting acceptable use policies and privacy policies;
* Representing customers in disputes with carriers before the FCC, in federal court and in arbitration proceedings; and
* Representing enterprises in regulatory proceedings.

Justin frequently addresses enterprise customers at conferences on telecommunications agreements and has written several articles about telecommunications and IT procurement, including TEM, back-billing, contract negotiation, vendor management, and SLAs.

Justin also serves as an adjunct professor of law at the Georgetown University Law Center.

Before joining LB3, Justin joined the Department of Justice through the Honors Program and worked on litigated cases involving the False Claims Act in the Civil Fraud Section from 1994 through 1997. He clerked for the Honorable John A. Terry of the D.C. Court of Appeals from 1993 through 1994. He is a member of the state bars of California, Colorado, the District of Columbia, and Washington, D.C. Follow Justin on Twitter: @telecomattorney