Our Team
The high level of experience and efficiency of the Wardlaw Appraisal Group staff allows us to be extremely effective and responsive while operating with less overhead.
Wardlaw has experienced and qualified appraisers, division order analysts, technology, and administrative support personnel. These personnel allow us to efficiently and accurately manage and appraise over 300,000 accounts, 16,000 wells, 14,000 division orders, 9,000 property records.
Peggy Wardlaw, P.E., R.P.A.
Owner and CEO
Peggy Wardlaw is a Texas Registered Professional Engineer and Registered Professional Appraiser. She has a Master's Degree in Petroleum Engineering from the University of Texas (one of only two females in the Petroleum Engineering graduate program at the University of Texas). She has over 35 years of experience appraising mineral, industrial, and utility properties. Peggys extensive experience ensures that Wardlaw produces the industry’s most superior product.
Malcolm Wardlaw, P.E.
Co-Owner
Malcolm Wardlaw is a software designer and co-founder of Wardlaw Appraisal Group, L.LC. Malcolm is a Texas Registered Professional Engineer. He has a Master's Degree in Petroleum Engineering from the University of Texas and has over 35 years of experience in petroleum reservoir engineering and software design.
Roxanne Yuncker
HR/Accountant
Roxanne Yuncker has over 40 years of experience in bookkeeping and accounting and has been with the company since the year 2000. Thanks to her extensive knowledge and experience, our company provides excellent client and customer relations. Roxanne also has over 20 years of experience as a division orders manager.
Mallory Crain, R.P.A.
Utility & Industrial/Division Orders Department Manager, RPA
Mallory Crain received her undergraduate degree from Texas Christian University. She has over 13 years of experience in property tax and over 20 years of experience in upper-level management. Mallory’s attention to detail and drive for success helps Wardlaw provide superior services to our client CADs.
Proctor Sherwin, R.P.A.
Mineral Department Manager, RPA
Proctor Sherwin graduated from the University of Texas with a BA in Geology. Proctor has over 13 years of experience in property tax with an extensive skill set in the appraisals process, data science, finance, and geology. Utilizing powerful analytical tools and thorough research, Proctor's expertise and vision helps us deliver the highest quality appraisals to our clients.
Libby Wardlaw
Mineral Appraiser, RPA
Libby Wardlaw received her undergraduate degree from Trinity University and has over 5 years of experience in property tax. With her extensive experience in property management and appraisals, Libby brings a fresh approach to valuations to Wardlaw Appraisal.
Martin Villarreal
Client Relations Manager, RPA
Martin Villarreal is a Registered Professional Appraiser with 35 years of experience in the appraisal and tax collection profession. Martin served as Chief Appraiser for both Webb and La Salle counties for 17 years. He served in different capacities in appraisal-related organizations, including President and member of the South Texas Chapter of Appraisal Districts, Trustee of the Texas Association of Appraisal Districts, and member of the Property Tax Administration Advisory Board.
Diana Martinez
Division Order Senior Analyst
Diana Martinez has more than 20 years of experience in the oil and gas industry. She is a dedicated bilingual professional with extensive experience serving taxpayers, operators, and agents. Her expertise includes updating ownership records, reviewing and processing division orders, addressing protests, and resolving client concerns with accuracy and efficiency. Known for responsive customer service, attention to detail, and strong industry knowledge, Diana is committed to building positive relationships and helping clients navigate complex processes with confidence in both English and Spanish.
Amanda Castro
Mineral Appraiser, RPA
Amanda Castro has over 5 years of experience in mineral appraisal and division order analytics. She brings a wealth of customer service knowledge to the mineral department and works diligently to ensure all mineral appraisals exceed expectations.
Claire McGinnis
Utility and Industrial Appraiser, RPA
Claire McGinnis received her undergraduate degree from Texas Tech University and her Masters degree from Texas A&M University. Claire has over 3 years of experience in property tax and her experience in business management ensures our appraisals meet all industry standards.
Susan McCormick Warhol
Utility and Industrial Analyst
Ladea Sherwin
Division Order Analyst