Anne Mazuca brings over a decade of legislative experience working at the Texas Capitol, most recently serving six years as Chief of Staff to State Representative R.D. ‘Bobby' Guerra.

During her time working in the Texas legislature, she has worked for Members from Dallas, Galveston and South Texas, allowing her the opportunity to build relationships with local elected officials, community leaders and stakeholders from across the state while working on a wide range of policy areas. Prior to being named chief of staff, she served as a legislative director and legislative aide where she was the primary staff lead for the House Appropriations Committee Article II and Article III focusing on healthcare and education funding, the Public Health Committee, Energy Resources, Business & Industry, Ways & Means and Insurance committees.

In her capacity as chief of staff, Anne was responsible for guiding the day-to-day operations of the Capitol and McAllen offices. Outside of the office, she provided support for her Member's re-election campaign where she provided feedback on messaging, managed all Texas Ethics Commission and campaign finance filings and offered general advice and assistance related to his campaign.

An Austin native, Anne has close ties to the city in which she still resides.

Tony Essalih joined Cornerstone in 2011 as a co-lead of the firm's flagship Texas office in Houston. He spent 12 years on Capitol Hill and came to Cornerstone from the office of Congressman John Culberson (R-Houston). Tony worked for Congressman Culberson for 10 years, the last five as his chief of staff. Prior to becoming chief of staff, Tony served in a variety of capacities including legislative assistant, legislative director, communications director, and deputy chief of staff. He spent eight years in Washington, D.C. before relocating to Houston in 2007.

As chief of staff, Tony was responsible for guiding the day-to-day operations of the Congressman's Washington and Houston offices, and oversaw a 15-member staff under a fixed budget. Outside of the office, he served as the principal liaison to the Congressman's campaign committee and provided strategic counsel and advice related to his re-election efforts. Tony's areas of policy expertise include transportation, energy, budget and appropriations. Tony also led outreach efforts and served as an emissary on behalf of the Congressman with state lawmakers in Austin and local elected officials in Houston.

Prior to Culberson's election in 2001, Tony worked as a legislative assistant for Congressman Culberson's predecessor, former House Ways and Means Committee Chairman Bill Archer. Tony's began his tenure on Capitol Hill with former House Natural Resources Committee Chairman Doc Hastings.

Tony has advised and assisted numerous local, state, and federal campaigns. He serves on the board of the National InterFaith Foundation, the Advisory Board for the Houston Technology Center, spent two years on the Board of the Spring Branch Medical Center and was a member of Houston Mayor Annise Parker's transition team in 2010.

Tony was born and raised in Fredericksburg, VA and received his B.A. in Political Science from Mary Washington College. He was a member of Mary Washington's NCAA semifinalist men's soccer team. He lives in Houston and has two angelic daughters, Grace and Libby.

Tyler, former chief of staff to Congressman Pete Olson (R-TX), joined Cornerstone Government Affairs in June 2016. During his seven-year tenure with Congressman Olson, Tyler served in various roles including campaign manager, district director, and deputy chief of staff.

In his most recent role as chief of staff, Tyler managed the Congressman's Washington and Texas operations and oversaw all political, legislative and communications strategies. Tyler was instrumental in developing the Congressman's agenda as a member of the Energy & Commerce Committee and guiding the Congressman's ascension to the role of Vice Chair of the Energy & Power Subcommittee.

Prior to working for Representative Olson, Tyler was a consultant with Hitachi Consulting in Houston, Texas. Before that, he was a legislative aide for the Houston City Council.

Tyler is a graduate of the University of Houston and currently serves as Vice Chairman of UH's Political Action Committee as well as an advisory board member of the Hobby School of Public Affairs at the University of Houston.

20+ years

Steve Holzheauser joined Cornerstone's Austin, Texas office October 2018 as a senior consultant and brings over 30 years of experience in state politics and government.

Prior to joining the firm, Steve founded and ran the Woodhouse Group Texas, a state governmental affairs firm. Since 1999, Steve has represented clients across a wide range of policy areas. He possesses an in-depth knowledge of the legislative process and maintains broad relationships with key members of the Texas Legislature, the Governor's office, and state agencies.

Steve was a member of the Texas State House of Representatives from 1987 until his retirement in 1998. While in the Texas Legislature, For four years Steve held the position of Chairman of the House Energy Resources Committee overseeing all aspects of the oil and gas industry. Additionally, Steve served on the powerful Ways & Means, General Calendars, Natural Resources, Economic Development, and Environmental Affairs Committees. During this time, he oversaw many diverse issues including energy policy, telecommunications, environmental issues, tax policy, economic development and water policy to name just a few.