Press Room

Ryan Promotes Eight to Principal in Three Practice Areas

Press Release Jan 21, 2020

2020 Social Media Graphic 8 Promoted to PrincipalDALLAS (Jan. 21, 2020) – Ryan, a leading global tax services and software provider, announced it has promoted eight individuals to the leadership role of Principal: Michael Abbatemarco, Property Tax CommercialLandon Julius, Sales and Use TaxJohn Minogue, Property Tax CommercialTeresa SharpProperty Tax CommercialVance ShullProperty Tax CommercialJamie Sieffert, Property Tax CommercialSamuel Tae, International Income Tax; and Trey WeaverProperty Tax Commercial.

“Congratulations to these remarkable executives and the valued contributions they have made to our Firm and our clients,” said Global President and Chief Operating Officer Ginny B. Kissling. “Ryan offers unparalleled opportunities for growth and advancement, and we are excited to reward these talented professionals for their commitment to client service and results.”

Michael Abbatemarco specializes in commercial real estate property tax consulting, ensuring that the real estate assessments are fair and equitable for clients, and advising on the property tax implications of new acquisitions. Based in Ryan’s Chicago office, Mr. Abbatemarco oversees the property tax appeal process for Cook County, Illinois and several Midwest states, including compiling market research, constructing valuation analyses and directing capitalization models, filing appeals, and negotiating settlements with local assessing officials.

Landon Julius, based in Ryan’s Kansas City office, specializes in providing multijurisdictional transaction tax advisory services, including audit defense, refund reviews, general representation, and education. Mr. Julius represents clients in numerous industries, inclusive of manufacturing, mining, retail, restaurant, airline, and professional services. He holds a Bachelor of Science degree with an emphasis in finance from Iowa State University.

John Minogue leads the Commercial Real Estate Business Development team in the Chicago office and is responsible for more than $20 million of sales annually. Mr. Minogue specializes in the valuation, assessment, taxation, and exemption of real and personal property on a state and local level for clients in a variety of industries, including commercial and industrial property, financial institutions, hospitals, public utilities, and not-for-profit charitable and civic organizations.

Teresa Sharp, based in Ryan’s Houston office, is seasoned in multistate jurisdictional personal property compliance, analysis of real and personal property values, equity of assessment review, informal and formal negotiations, audit defense, property tax accrual and budgeting management, and other comprehensive tax services. She has also appeared as a frequent speaker for the Institute for Professionals in Taxation. Ms. Sharp received a Bachelor of Science degree in accounting from Colorado Mesa University.

Vance Shull specializes in commercial real estate tax consulting, providing representation to owners in ad valorem tax appeals of retail properties, shopping centers, malls, office buildings, apartments, and entertainment venues in Ryan’s Dallas office. He is affiliated with the Texas Association of Property Tax Professionals. Mr. Shull earned a Master of Business Administration degree in marketing from The University of Texas at Austin.

Jamie Sieffert, based in Ryan’s Dallas office, specializes in providing commercial real estate property taxation services, including valuation and reporting for both real and personal property assets, with a focus on multifamily assets in the Dallas/Fort Worth area. Mr. Sieffert also handles appeals throughout the South-Central United States. He holds a Master of Land Economics Real Estate degree from Texas A&M University and is a licensed Senior Property Tax Consultant in Texas.

Samuel Tae, based in Ryan’s Atlanta office, specializes in global tax minimization and recovery and advises multinational clients on complex cross-border transactions. Mr. Tae is also a frequent speaker at national conferences and contributes to local tax journals. He holds a Juris Doctor degree from the Emory University School of Law.

Trey Weaver, based in the San Antonio office, is seasoned in commercial property tax services focusing primarily on office and retail properties in Central and South Texas, while managing appeal work on a national basis for large real estate portfolios. Mr. Weaver joined the Firm in 2018 and holds a Master of Land Economics and Real Estate degree from Texas A&M University. He also received a Bachelor of Science degree in business administration and construction management from John Brown University.

About Ryan

Ryan, an award-winning global tax services and software provider, is the largest Firm in the world dedicated exclusively to business taxes. With global headquarters in Dallas, Texas, the Firm provides an integrated suite of federal, state, local, and international tax services on a multijurisdictional basis, including tax recovery, consulting, advocacy, compliance, and technology services. Ryan is an 11-time recipient of the International Service Excellence Award from the Customer Service Institute of America (CSIA) for its commitment to world-class client service. Empowered by the dynamic myRyan work environment, which is widely recognized as the most innovative in the tax services industry, Ryan’s multidisciplinary team of more than 4,800 professionals and associates serves over 30,000 clients in more than 80 countries, including many of the world’s most prominent Global 5000 companies. More information about Ryan can be found at


Melodie Elliott
Director, Content and Communications Marketing