Management Team

A perfect mix of professionals, technology and local experienceto provide creative solutionsfor the projects in isolatedand challenging areas

Board of Directors

Steven Webster, Chairman

Prior to co-founding Avista Capital Partners in 2005, Mr. Webster served as the Chairman of Global Energy Partners, a specialty group within DLJ Merchant Banking, which sourced, executed and managed DLJMB’s energy-related investments beginning in 2000.

Throughout his business career, Mr. Webster has been active in venture capital and investment activities. In 1978, he co-founded an investment banking firm specializing in financing and venture activities in the energy business. In 1988, he founded Falcon Drilling Company, an offshore drilling contractor, which became a public company in 1995 and then merged into Reading & Bates in 1997, creating R&B Falcon Corporation (FLC:NYSE). Mr. Webster served as Chairman & CEO at Falcon and then CEO & President at R&B Falcon through 1999. In 1993, he co-founded Carrizo Oil & Gas, Inc. (CRZO:Nasdaq), an oil and gas exploration and production company and was named its Chairman in 1997 when it was publicly listed. Mr. Webster co-founded and/or was a lead investor in numerous other successful ventures in the energy business, including Grey Wolf (GW:ASE), Hercules Offshore (HERO:Nasdaq), Laredo Energy, Peregrine Oil & Gas and Union Drilling. In addition, he has also been a lead investor in companies outside the energy business, including Crown Resources (CRCE:OTC), Encore Bancshares (EBTX:Nasdaq), RediClinic LLC, Gow Communications and other companies. He was a founding Trust Manager of Camden Property Trust (CPT:NYSE).

Mr. Webster currently serves as the Chairman of the Board of Carrizo and Basic Energy Services (BAS:NYSE) and as a director of Geokinetics (GOK:ASE), Hercules, Laramie, Laredo Energy, Peregrine, Royal Offshore and Seacor Holdings (CKH:NYSE). He remains a Trust Manager of Camden.

In 1973, Mr. Webster graduated with a BSIM degree with Distinction from Purdue University and in 1975, graduated with an MBA degree with High Distinction from Harvard Business School, where he was a Baker Scholar. In 2009, Mr. Webster was awarded an honorary Doctor of Management degree from Purdue. He serves on the Advisory Board of Purdue's Krannert School and the Development Board for the University.

Trevor Turbidy, Board Member

Prior to joining Avista in 2007, Mr. Turbidy was the CEO of Trico Marine Services (“Trico”), an international provider of marine support vessel services to the offshore oil and gas industry. He led the successful turnaround of this company from a financially distressed Gulf-oriented operator to a well-capitalized offshore services provider with operations in the North Sea, West Africa, Gulf of Mexico, Brazil, Mexico and Southeast Asia. Mr. Turbidy was recruited as CFO of Trico in 2003, functioned as the Chief Restructuring Officer during the company’s restructuring and subsequently was promoted to CEO after its successful completion. Mr. Turbidy recruited operations and financial management teams who were critical to the successful execution of the company’s new internationally-focused strategy. Prior to his service at Trico, Mr. Turbidy spent over a decade with DLJ and Credit Suisse in their investment banking divisions. During his tenure with DLJ/Credit Suisse, he predominately focused on the energy sector, principally offshore and land drilling contractors, seismic service providers, oilfield equipment manufacturers, offshore support vessel providers and exploration and production companies, as well as regional opportunities in the Southwest.

Mr. Turbidy received a B.A. from Duke University. He currently serves as a Director of Hansa Hydrocarbons, Spartan Offshore Drilling, Celtique Energie, Precision Drilling and Manti Exploration.

Greg Evans, Board Member

Mr. Evans was one of the founding members of Avista Capital Partners in 2005. Prior to Avista, Mr. Evans was at DLJMB Global Energy Partners from 2003 to 2005 and was involved in a number of DLJMB’s energy investments. Prior to joining DLJMB, he was an Analyst in CSFB’s Global Industrial and Services Group of the Investment Banking Department.

Mr. Evans received a B.B.A. from the University of Texas at Austin in 2001.

He currently serves as a Director of Hansa Hydrocarbons, Celtique Energie, and Thompson Publishing.

William Ziegler, Board Member

Mr. Ziegler has been counsel to the law firm of Satterlee Stephens Burke & Burke LLP since January 2001.  Prior to that time he was a partner in that law firm and predecessor firms for over five years.  Mr. Ziegler is a private investor.    He is Chairman of the Board (non-executive) of Vesta Corporation, a virtual payments company, iForce Group Limited, an e-fulfillment company, Tablogix International Ltd., a logistics company, Geokinetics, Inc., a seismic services company, Shera International Ltd., a point of sale technology company, Somerset Gas Transmission Company, a gas pipeline operator and gas gathering developer, Somerset Production Company, an oil and gas exploration company, and Union Drilling Investors LLC, an oil and gas drilling services holding company.  Mr. Ziegler was one of the original organizers and formerly Vice Chairman of Falcon Drilling Company, Inc., an offshore drilling services company, which was sold to Transocean Inc. in 2001. 

Mr. Ziegler was the lead investor in Grey Wolf Inc., an oil and gas drilling company, where he served as Vice Chairman until its sale to Precision Drilling in December 2008, and a lead investor in Flotek Industries Inc., an energy services company, where he served as a director until his resignation in March 2009.  He serves as a director of Speech Cycle, Inc., a speech solutions provider, American Coradius, Inc., a financial services company, La Crosse Milling Company, a grain milling company and Zone Oil & Gas Company, a shale gas development company.  Mr. Ziegler is a graduate of Amherst College and received a law degree from the University of Virginia and an M.B.A. degree from Columbia University.  He has practiced corporate, banking and securities law since 1968.

Thomas O'Neill, Board Member

Mr. O’Neill has over 30 years of domestic and international experience in the field of petroleum exploration and financing. Mr. O’Neill serves as Chairman of the Board (non-executive) of Union Drilling, Inc., a NASDAQ-listed oil and gas drilling company with operations in the Appalachian Basin and the Rocky Mountains. Mr. O’Neill is a director of Firebird Holdings Limited, a logistics and contract warehousing business with operations in Eastern Europe, Russia and the United Kingdom. Mr. O’Neill has drilled or has acquired ownership in approximately 1,600 wells, most of which were drilled throughout the Appalachian Basin. In addition, Mr. O’Neill is a director of Somerset Gas Transmission, a gas pipeline operator and developer. He has bought and sold many pipeline systems, various oil and gas companies and well-servicing organizations located in the Appalachian Basin.

He serves as a chairman of American Coradius International, a financial services company. Mr. O’Neill served on Governor Cuomo’s Advisory Board for Oil, Gas and Solution Mining for the State of New York from 1981 to 1986, served on the New York State Banking Board from 1994 through 1997, and was appointed by Governor Pataki to the New York State Dormitory Authority Board where he served for six years as Vice Chairman. Mr. O’Neill is a graduate of Canisius College in Buffalo, New York.

Michael Calderone, Board Member

Michael Calderone is President and Chief Executive Officer of Appalachian Midstream Partners, LLC (AMP), a private midstream group actively developing and acquiring gas gathering assets in the Marcellus and Utica shale fairways. In addition to being President of AMP, Mr. Calderone also serves as President of Somerset Gas Transmission Company, LLC (Somerset Gas), a privately-held company engaged in the development and operation of natural gas pipelines serving wholesale markets in the United States. Mr. Calderone joined Somerset Gas as Senior Vice President in 2004 and was elected President in 2009. During this time Mr. Calderone assisted or lead the company through multiple asset acquisitions including the purchase of Columbia’s 1818-1862 pipeline system of North Central, PA in 2009. After establishing the system’s first anchor customer, the former Columbia system, now operating as Somerset Gas Gathering of Pennsylvania and renamed “Bear Print Pipeline,” was contributed to a new venture with Avista Capital Partners –Appalachian Midstream Partners.

Prior to joining Somerset, Mr. Calderone was the Chief Operating Officer of Energy USA-TPC Corporation, and responsible for day to day operations of the company's gas marketing and trading activities as well as all back and mid-office functions. Mr. Calderone joined TPC in 1991 as Director of Profit Optimization and was primarily responsibility for selling storage and commodity services through the company's salt-cavern storage facilities. In 1994, Mr. Calderone was elected Vice President-Gas Marketing and later Senior Vice President of Marketing & Trading.

Prior to TPC, Mr. Calderone worked for CNG Transmission Corporation as Manager of Transportation & Exchange and Manager of Interstate Marketing. In these roles, Mr. Calderone helped to established CNG's transportation program required by Order 436 and was responsible for renegotiating and securing new sales and transportation services in response to the order. Prior to 1985, Mr. Calderone was engaged in the private practice of law and holds a B.A. and J.D from Duquesne University.

AMP team