S. Miller Williams

Willbros Group, Inc. engages in the provision of engineering and construction services to the oil, gas, refinery, petrochemical, and power industries. The company was founded by Miller Williams and David Williams in 1908 and is headquartered in Houston, TX.

Wiltel Communications Group, Inc. provides customized communications solutions to enterprises, and federal government. The company was founded by Robert D. Williams and is headquartered in Tulsa, OK.

PowerTel Ltd. provides telecommunications services including local calls, long distance, fixed to mobile calls, leased line, frame relay, ATM, managed router services, LAN bridging, corporate dial, Internet, co-location and IP VPN services. The company offers integrated voice, data, Internet and other telecommunications services to businesses in Australia. The company is headquartered in Sydney, Australia.

VarTec Telecom, Inc. provides local and long-distance telecommunications services to business and residential customers in the US, Canada and Europe. It has its own switching and network infrastructure in the U.S. and Europe. The company was founded by A. Joe Mitchell Jr. in February, 1989 and is located in Carrollton, TX.

Part of Network Telephone Services, Inc., Mediatech, Inc. publishes and distributes children's books. The private company is based in Chicago, IL. Mediatech was acquired by Independent Telemedia Group, Inc. on October 06, 1994 for $9.25 million.

Part of Tidnish Holdings Ltd. (Canada), LinkBermuda Ltd. is a Bermudian company that provides communications services. The private company is based in Hamilton, Bermuda. LinkBermuda was acquired by Oxford Communications, Inc. from Cable & Wireless Communications Ltd. on March 10, 2011 for $70 million.

SolTherm Energy LLC provides plumbing, heating, and air conditioning services. The private company is based in Asheville, NC. The company was founded by Tom Ryan.