20+ years

Leadership Maryland Board and is a member of the class of 2019

University of Maryland Baltimore County School of Public Policy External Advisory Board

Maryland Economic Development Association Board and Co-Chair of the Public Policy Awareness Committee

Chair, Odenton Town Center Advisory Committee

With more than 20 years of government relations, management, and administration expertise, Andrea E. Mansfield brings her ability to successfully execute advocacy efforts and programs to Manis Canning. Her broad experience and involvement with the Maryland Legislature on policy, fiscal and budget matters; and her ability to work with diverse groups and build consensus on complex issues is an asset to the firm.

Andrea has extensive experience at the state and local level, having led and coordinated policy efforts for the Maryland Association of Counties (MACo) and implemented the legislative agendas of state agencies. As MACo's Legislative Director she advised, crafted, and implemented the common agendas and legislative goals of Maryland's 23 counties and Baltimore City.

In state government, she worked within three Administrations in positions of increasing responsibility, serving as legislative liaison to the Legislature for the Department of Budget and Management, and the Department of Labor, Licensing and Regulation (DLLR); and Special Assistant, Director of Financial Aid, and Assistant Secretary of Finance Policy with the Maryland Higher Education Commission.

She has a Master of Policy Sciences from the University of Maryland, Baltimore County and a Bachelor of Arts in Government and Politics from the University of Maryland, College Park.

Felix Chevalier is an attorney and government affairs professional with over 20 years of experience developing and implementing effective procurement and policy strategies. He's skillful at identifying and facilitating public-private partnerships. Felix joined Cornerstone's Houston office as a senior consultant in June 2022.

Felix provides expertise and client support at the local, state and federal levels. He also has an extensive national and international network, specifically in Central America, South America and the Caribbean. Felix has worked with companies in various industries including energy, manufacturing, transportation, agriculture, engineering, and technology. By leveraging his business, political, and legal experience, Felix has built a successful track record of working with clients to advance their strategic business objectives. He has strong relationships with the international diplomatic community and government officials. He has facilitated official delegations and international trade missions, representing companies, local governments and national associations.

In 2005, Felix launched his own Houston-based law firm, The Chevalier Law Firm, which he continues to manage and operate, representing companies in a wide variety of industries. He also co-founded Key PAC, which is a non-partisan organization that convenes business and community principals with political leaders on economic and social matters.

Felix received his law degree from St. John's University School of Law, his Bachelor of Arts from the State University of New York at New Paltz College and completed an Executive Education Program at the Tuck School of Business at Dartmouth College. He also speaks fluent Spanish.

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.

Matthew Garcia joined Cornerstone in December of 2024, expanding the firm's Texas footprint to Dallas. A seasoned government and public affairs executive with over two decades experience in the Dallas Region, Matt brings a wealth of experience in policy, advocacy and stakeholder engagement. He joins Cornerstone from the Dallas Regional Chamber, where he served as Senior Vice President of Public Policy and Advocacy. In this role, he spearheaded the organization's public policy strategy, while remaining closely engaged with legislators, key stakeholders and C-level executives across the Dallas Region for one of the largest Chambers of Commerce in Texas.

Prior to his time at Dallas Regional Chamber, Matt worked as the Director of External Affairs for Leon Capital Group where he developed the firm's public affairs strategies across their multiple business lines.

Previously, Matt served in the United States House of Representatives, first as District Director (2010-2013) and then as Chief of Staff-Texas (2013-2018), managing Rep. Pete Sessions' (R-TX) office and serving as a key advisor on energy, transportation and general business issues for Texas. Notably, Matt served as the North Texas congressional point of contact working with area city officials, the North Texas Municipal Water District (NTMWD) and the Army Corps of Engineers to bring online Bois d'Arc Lake, the newest major reservoir in Texas in over 30 years. Matt also worked alongside emergency response teams at the city, county and state levels during the 2014 Ebola crisis in Dallas to deliver accurate and timely public communication while leading information coordination with federal agencies, including the National Institute of Health and the Department of Health and Human Services.

He earned his bachelor's degree in finance from the McCombs School of Business at the University of Texas at Austin. Garcia currently serves as Director of the Texas Association of Business, The Dallas Zoo and the Texas Lyceum, and member of the following organizations: McCombs School of Business BBA Advisory Board, Simmons Cancer Center Community Advisory Board, Reading Partners North Texas, the State Fair of Texas Chairman's Task Force, the YMCA of Metropolitan Dallas Brand Advancement Committee and the SMU Corporate Communications and Public Affairs Advisory Board.

0-5 years

Annabelle Sebesta joined the Austin office as a Senior Associate in October 2022. In her role, she assists with administrative and support duties, scheduling meetings and organizing annual events and legislative receptions. Additionally, during the legislative sessions, she provides extensive support to the team by following legislation and keeping the team up to date with information.

Prior to Cornerstone, Annabelle served as Administrative Coordinator at the Office of the Texas Speaker. In this role, she assisted senior staff with correspondence, resource navigation, special property and supply requests. In the same office, Annabelle was a Correspondence Assistant, where she drafted correspondence by researching legislation and maintained data entry for incoming and outgoing communication. She also assisted the director of administration with onboarding the 87th regular legislative session intern class and new staff members of the office, as well as the production of special events.

Annabelle received her bachelor's degree in advertising from the University of Texas Austin.

20+ years

Nicholas G. Manis, the son of MCA co-founder George Manis and managing partner of the firm, has presided over legislative and special event successes on behalf of clients such as the Motion Picture Association of America, the Baltimore Ravens, the Maryland Association of Certified Public Accountants and Pfizer.

Nick has been an accomplished lobbyist and legislative analyst for more than 25 years and has played an instrumental role in forging innovative and economically enhancing business partnerships among clients. He is proud to see MCA continuously ranked as one of the top lobbying firms in Maryland and the growth the firm has experienced during his time here. He has represented clients in matters related to sports entertainment, taxes, professional licensing, gaming, transportation, insurance, franchises, business regulation, information technology, environmental regulation, mergers and acquisitions, pharmaceuticals and healthcare.

In 1989, Nick's business bent led him to co-found Manis & Wright Realty, a premier residential and commercial realty firm that grew from modest beginnings to a successful 40 associates company that merged with the largest real estate company in Maryland.

Nick graduated from the University of Maryland, College Park in 1980. He was the captain of the varsity lacrosse team during his time at College Park.

A native of Annapolis, Nick is involved in many local business and community organizations including the Annapolis and Anne Arundel County Chamber of Commerce, the University of Maryland Marlene and Stewart Greenebaum Cancer Center Board of Advisors, Annapolis Youth Lacrosse Association, and the Maryland Chamber of Commerce. He was presented the Louis L. Goldstein Award in 1998 in recognition of his efforts on behalf of the Maryland Alcohol Beverage Industry. He is married with two children.

Max Moll joined the Cornerstone Public Affairs team April of 2023, bringing a public affairs and strategic communications presence to Cornerstone's Texas offices. In his previous role as chief engagement officer at the Houston Independent School District, he oversaw government relations, communications, family and community engagement and board relations for the nation's eighth largest school district. He also oversaw the district's legislative affairs work and external lobby team, ensuring alignment and execution of district's legislative priorities. In addition, he represented the district with external stakeholders, in traditional and digital media appearances, and on panels and other various speaking opportunities. He was also the lead spokesperson for the district and main point of contact for elected officials, advocacy groups and private industry.

Prior to working at HISD, Max served as the chief communications officer & deputy director for the Office of the Houston City Controller, Chris B. Brown. He spearheaded all communications initiatives for the Office of the City Controller, working across the City of Houston's 22 departments to help unify external and internal communications. Max served as liaison between Controller's Office and the city's investors, developing key external messaging relating to investment strategy, portfolio performance, and maintaining key relationships with city's investor base. In addition, and in partnership with the Controller's Office Treasury Division, Max helped oversee the city's Environmental, Social, and Governance (ESG) investments, helping grow the portfolio to over $950 million.

Max also served as the chief of staff to the CEO of the Houston Hispanic Chamber of Commerce, where he oversaw the development and execution of the Chamber's public affairs and community outreach efforts, legislative advocacy campaigns and external affairs projects. Also, he served as the main point of contact for media, securing comprehensive coverage and managing all media relationships on behalf of the Chamber and its members.

He holds a master's in business administration from Boston University, master's in political management from George Washington University, and a bachelor's in mass communication from LSU.

Martin Hubert brings a wealth of state government experience to the clients of Cornerstone Government Affairs. From his early career as chief counsel to the Senate Natural Resources Committee to his gubernatorial appointment as a commissioner of the Texas Commission on Environmental Quality to his eight years as the deputy comptroller of Texas, Hubert has managed thousands of employees and millions of taxpayer dollars under both Democrat and Republican administrations.

Martin was the 2008 recipient of TSABAA's Administrator of the Year Award. Presented annually, this prestigious award was established to formally recognize state employees who have demonstrated outstanding leadership skills and who have made significant contributions to state agency business administration.

As the final general counsel to legendary Lt. Governor Bob Bullock, Martin learned the mastery of government relations from some of the most influential leaders in Texas history. His knowledge of agriculture stems from generations of the Hubert family's cow/calf and farming operations in South Texas and serving as the Texas Deputy Commissioner of Agriculture for eight years. Martin offers a unique combination of legal, natural resources, tax policy and state government procedural expertise.

Hubert is a graduate of the Georgetown University Law Center and St. Mary's School of Law. He was Brigade Executive Officer in the Corps of Cadets at Texas A&M University, where he was a member of the Ross Volunteers Honor Guard and the Singing Cadets. He successfully completed Army Ranger School and served in the U.S. Army Reserves. He is a marathon runner and coaches his son's little league teams.

Hubert is a second tenor and helps raise money for Legal Aid through the Travis County Bar Association's "Bar and Grill" fundraisers. He and his wife Celeste live in a historic home in Austin, where they are involved with the Austin Symphony, St. Theresa's Catholic Church and School, and the happily busy lives of their children Belle and Patrick.