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Andy Wharton 


Andy Wharton graduated from Texas A&M University in College Station, Texas with a Bachelor of Architecture degree in Environmental Design. Andy joined Chamberlin after he graduated in 2004 and has provided personalized, professional building services ever since.

In addition to the ASA, Andy is an active member of TEXO Association (ABC/AGC Affiliate of North Texas) and the International Institute of Building Enclosure Consultants. He is the current co-chair of Build Texas Proud and committee member for high school outreach and KidsBuild, both through TEXO. Andy has been played a vital role in Chamberlin winning many awards like the 2017 TEXO Distinguished Building and 2015 Engineering News Record Best Project Merit. In his free time, Andy enjoys being a member of Messiah Lutheran Church in Plano, being a proud father and husband, playing golf, upland hunting and building employees to their greatest potential.

Al Amerson

1st Vice President

Al Amerson grew up in New Orleans, Louisiana and loves spending time outdoors hunting and fishing when not working. He graduated with a Materials Engineering degree from Auburn University in 2001. Upon graduation he began his career with York International where he was a sales engineer. In 2006 he returned to Auburn to get an Executive MBA while continuing to work as a senior sales engineer for Johnson Controls.  In 2010 Al joined Texas AirSystems as a Senior Sales Executive working in the Fort Worth office. At Texas AirSystems Al focused his sales efforts on engineers and mechanical contractors. In 2017 Al became a shareholder and was promoted to Director of Special Projects, assisting on the sale of large projects in DFW along with M&A opportunities in Florida, Nevada, North Carolina and South Carolina. In 2019 Al was promoted to DFW Sales Manager, where he grew Texas AirSystems sales to over $200 million. In 2020 Al was promoted to VP of Sales.Al is actively involved in Soles for Souls, where he has traveled to Dominican Republic and Tanzania to distribute shoes and takes part in hosting local shoe drives. Al is a member of TREC, TEXO, and ASHRAE.

Casey Troxclair

2nd Vice President

Casey Troxclair has worked in the DFW Construction industry for the last 22 years. Casey is the Contract Manager for KPost Company. The first 14 years of her career she was a project coordinator for Potter Concrete. She started at KPost as a project administrator in 2016 and then worked her way into an Executive Assistant role and now Contract Manager. She served in the first group of ASA Future Leaders. In addition to ASA, she is currently serving as the Community Service Chair for National Women in Roofing. Casey loves working in the construction industry and reminding other women that there is a place for all of us here. She enjoys spending her free time with her husband Tony and their two sons. Life is busy and fun with little boys!  

Lee Ann Collins

Secretary/ Treasurer

Lee Ann Collins, CPA, is the Managing Partner of Lane Gorman Trubit, LLC (“LGT”). In a career that spans more than three decades, she’s become a demonstrated leader in the financial services industry providing audit, tax, and consulting solutions to clients in the construction, manufacturing, and not-for-profit sectors. A long-time advocate for women in the workforce, Ms. Collins is only the second woman in LGT’s 65-year history to serve as managing partner. She is a frequent speaker at state and local events helping educate other accounting professionals about financial reporting matters and the latest taxation developments. An avid photographer and traveler, Ms. Collins enjoys time outside the office with her husband Skip and two sons.

Derek Hyzak

Past President

Derek Hyzak is the Director of DFW Construction of Polk Mechanical. Polk Mechanical is a mechanical services provider that serves both commercial and industrial markets in the DFW and Houston areas. He is a graduate of Texas A&M with a degree in Mechanical Engineering with 17 years of experience in mechanical construction. He is primarily responsible for establishing and maintaining project plans and budgets, organizing and leading project teams, fostering communication and coordination between functional groups, ensuring adequate resourcing to meet goals, and identifying risks and contingency plans. In his free time, Derek enjoys spending time with wife, Layne, and their daughter, Beau, and cheering on the Aggies during football season. 


Camilo Carvajal


Camilo Carvajal is currently the Branch Manager for the MEMCO Dallas Operation. Within his 20 plus years of experience in the commercial construction industry, he has served under the role of field employee in the Commercial Drywall Industry, Personnel Manager, Safety Advisor, Recruiter, and his current role of overseeing the day-to-day operations in the North Texas market. With the invaluable training he received in the early stages of his career, he has been fortunate to incorporate that knowledge and innovation to be successful in his current leadership efforts. His training received has involved anything from trade familiarity to OSHA geared safety training to hiring law practices to employee benefits to worker’s compensation compliance. Throughout his tenure he has been involved in projects such as the Texas Trust Theater in GP, Gaylord Opryland Convention Center, AT&T Stadium, Globe Life Park, TCU Amon Carter Stadium, DFW Airport Terminal Renovations, Love Field Airport, Parkland Hospital, and others. 

MEMCO is a service-oriented employment firm that provides skilled, semi-skilled, and unskilled workers to approximately 300 clients. While our clients operate in a variety of industries, we are widely held as the most knowledgeable and experienced provider of payrolling, recruiting, and staffing services to the construction industry.

Jason Biermeier


Jason grew up on a dairy farm in Wisconsin and moved to Dallas in 1994 after graduating from the University of Wisconsin – La Crosse.  He began his construction career as a project coordinator for a residential land development company in Dallas – Fort Worth.  He gained additional knowledge of the industry doing business development for an underground utility contractor before moving on to sales and operation positions, to COO of an EPC power generation company focusing on remote international projects.  Tri Dal was a company with a long standing history and a culture that Jason felt a connection with and joined the team in 2016 as a project manager.   In 2019, he moved into the role of Vice President of Operations for Tri Dal Utilities where his goal is to continue a culture that promotes integrity, open communication and a positive customer experience.  In his free time Jason enjoys riding motorcycles, watching sports, and working out. 

Kevin Hoppman


Kevin Hoppman is the Director of Sales and Marketing for Big D Metalworks, an award winning employee owned architectural metal company that specializes in providing monumental stairs and decorative railing systems.  He joined Big D Metalworks after graduating from Concordia University Texas with a BBA in International Business, a minor in speech communications, and having spent 4 years as a starter on their golf team.  He has worked in various roles throughout the organization over the last 14 years.  He has been actively involved at ASA through the Future Leaders prior to joining the Board.  Outside of time spent at Big D Metalworks and ASA Kevin enjoys spending time with his wife and three children.

Kyle Kelly 


Kyle Kelly is from Boerne, TX and a graduate of Texas A&M in Industrial Distribution from the Dwight Look College of Engineering. While at A&M Kyle was in the Corps of Cadets, worked with Southwestern Advantage and served as Student Body President.

Working with Marsh McLennan Agency Kyle is a Consultant/Broker in Risk Management, Insurance and Bonding primarily specializing in the commercial Construction and Real Estate industries. He started his career in project insurance working on multi-million and billion dollar jobs including skyscrapers, stadiums, airports etc. and in more recent years has predominantly partnered with General and Specialty Contractors to strategically protect their balance sheet and maximize profit. Kyle has been extensively involved in Insurance and Construction currently through the TEXO as well as American Subcontractor Association (ASA) Board of Directors and ASA Government Affairs Chair.

Kyle and his wife Caroline live in Fort Worth, TX, have 2 daughters Charlotte and Lucy and are expecting their 3rd baby in July. 

 Matt Morgan


Matt is currently Vice President for Mdm Scaffolding Services, Inc., a supplier, and subcontractor of NexGenPlank, Scaffolding, Shoring, Mast Climbing Work Platforms and Hoists in the Dallas - Ft. Worth area. Mdm has been an active member of ASA since 1993 and I have been active for the past 10 years. I currently sit on the Scaffold Access Industry Association (SAIA) Executive Committee, Board of Directors, Plank Committee, as well as participate in the TEXO Young Constructors Council (YCC) and Board of Directors for American Subcontractors Association - North Texas.  

Matt was born and raised in Dallas - Ft. Worth but ended up at the Milwaukee School of Engineering (MSOE) in Wisconsin, where he played basketball for four years and was team captain for two of those years. He has been working for Mdm since he was a freshman in high school, starting in the warehouse/yard and then moving to the installation crews before interning during college. Matt started as the marketing assistant at Mdm and now oversees the entire company with his daily focus on business development, engineering design and operations. He is currently working towards transition Mdm to second-generation ownership, which has been owned and operated by Gene and Carol Morgan for over 28 years.

Melanie Kuhr


Melanie Kuhr brings a unique skill set, including over 35 years of leadership, business development, and human resources experience, to her role as CEO of Signature Millwork, a premier architectural millwork company based in Dallas since 1991.Melanie has enjoyed the growth and challenge of leading her company to its successful position as a well-respected WBE, HUB and FSC certified company.  Before acquiring Signature Millwork with two partners in 2005, she held leadership positions with Proctor & Gamble and EDS.

Melanie also serves numerous professional and community service organizations, including Dallas Holocaust and Human Rights Museum, Board of Directors, Executive Committee and Chair of Development, American Subcontractors Association, Board of Directors, Association of Professional Women in Construction, and Dream Team Women’s Network.

Melanie is also the co-author of DasHaus in East Berlin;  the story of her own family’s journey from Nazi Germany to present day America. A Cincinnati, Ohio, native, Marietta College graduate, Melanie relocated to Dallas for her fourth and final time in 2009.

Shawn Hanrahan


Shawn Hanrahan is the General Manager of the Dallas Branch for Schneider Electric, a global leader specializing in energy management and automation solutions. He is responsible for the overall financial success of the Branch, accomplished through a high focus on customer and employee satisfaction. After obtaining a B.S. in Industrial Distribution from Texas A&M University, Shawn joined Schneider Electric through the University Recruitment program in 2008. He started his career as an Account Executive and has since had responsibility in sales and operational leadership. Shawn attributes his success to building the best teams possible through the empowerment of employees. In his free time, Shawn enjoys hanging out with his wife and two kids, as well as cooking on his Green egg while enjoying a nice glass of bourbon.

Sheri Tillman 


Sheri Tillman is General Counsel for TDIndustries, Inc., a premier mechanical construction and facilities service company. Sheri is involved in a number of professional associations including the State Bar of Texas Construction Law Section, the American Bar Association - Construction Law Forum and the American Subcontractors Association, North Texas Chapter. She also serves on the Board of the DFW Women’s In-House Network. Sheri received her law degree from Texas A & M University School of Law and her undergraduate degree in Political Science from Southern Methodist University. 

Steve Markee


STEVE MARKEE, Director of Business Development for Prism Electric,  focuses on client relations with his deep industry connections and new business opportunities for the Texas and Oklahoma regions. He has served three decades in the electrical industry, starting in the field as an apprentice to managing a range of complex projects in healthcare, commercial, tenant improvement, and water/wastewater. In 2005, Steve was part of a team that went to New Orleans, LA, after Hurricane Katrina to help restore the canal infrastructure. Steve's well-rounded experience includes preconstruction, estimating to overseeing projects. He excels in leading multi-disciplinary teams, making him an integral part of Prism's success.

Traci Strieker Hancock


Traci Strieker Hancock graduated Texas Tech University in 2008 with her BBA in Management.  After graduation she began working at Striland Construction, LP, a concrete forming subcontractor.  Over the past fifteen years she has worked in many different facets of the company including operations-geared work as a project manager as well as office-focused jobs ranging from A/R & A/P to payroll & H/R.  She has also made it a priority to be active in ASA serving on the Events Committee since 2008 and Future Leaders since its inception in 2017.  In addition to volunteering she has also attended numerous Walks on the Capitol to help lobby for favorable Subcontractor legislation. 

Traci is married to Ryan Hancock, who joined the family business in 2018.  Together they are very blessed to have both a daughter, Harper Belle (2), and a son, due November 2023.  In their free time they enjoy traveling the world and taking in a few Stars games when they can.  

Fred Wilshusen

Legal Council

Fred D. Wilshusen is a partner in the Dallas, Texas law firm of Thomas, Feldman & Wilshusen, L.L.P., a law firm that concentrates in the area of construction law and related litigation. Thomas, Feldman & Wilshusen, L.L.P. and its predecessors have been the attorneys for ASA North Texas Chapter since 1974. Mr. Wilshusen is also the attorney for the Texas Construction Association. He is a former Chair of the Dallas Bar Association Construction Law Section and is currently the Chair of the Texas State Bar Construction Law Section. Mr. Wilshusen is the co-author of the Texas Lien and Bond Claims Handbook, 6th Edition. Mr. Wilshusen is also a member of the American Arbitration Association Roster of Neutrals for the construction industry.

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