Founded in 1999, QSI has provided forensic economic and accounting consulting along with witnessing services to a wide-array of stakeholders in network intensive industries, including regulated and non-regulated industry participants, governmental agencies and law firms. We have worked for wireline and wireless communications companies of all sizes, including AT&T, Bell Canada, Comcast, Charter Communications, Cross Telephone, Free Conferencing Corp., Level 3 (now Lumen), Liberty Media, Midcontinent Communications, Peerless Network, Quebecor Media, Shaw Communications, T-Mobile, Time Warner Cable (now Charter), MCI (now Verizon) and Zayo Group. Our corporate clients also include satellite broadcasting companies, such as Sirius XM Radio and Dish Network; energy services companies such as TKO Gas, BC Hydro and Toronto Hydro; infrastructure development companies such as Crown Castle; and transportation companies such as Young Brothers.

We have provided expert consulting services to state taxing authorities in Idaho, Illinois, Massachusetts, Missouri, Oregon, Pennsylvania and Tennessee, and a number of municipal authorities, including, Hopewell Borough in New Jersey and the City of Albuquerque in New Mexico. We serve state entities that oversee network industries, including state Legislatures in Kansas and Wyoming, state public utility commissions in Colorado, Washington D.C., Hawaii, Maine, New Mexico, Minnesota, Oregon, South Dakota, Vermont, and Wyoming. Our clients also include consumer advocates in Colorado, Washington D.C., Maryland, Ohio, Texas and Utah, and state attorneys general in Arkansas, Connecticut and New Mexico.

We support law firms participating in class action lawsuits, whistle blower cases and other matters.

For the past decade, we have provided consulting services to the U. S. General Services Administration (GSA) and the Department of Defense (DoD) - the nation's largest customer of telecommunications services. Our work for GSA and DoD includes dozens of projects involving emerging telecommunications technologies, contractual offerings, pricing and policy. QSI's work for GSA and DoD has been instrumental in achieving millions of dollars in cost savings for the Federal government and rolling out next-generation, data-intensive services to Federal Agency telecommunications customers.