GEM Expert Matrix - Invoice with confidence
GeoInvoice specializes in providing sales tax and digital field ticket solutions for the oil and gas industry. The company’s flagship product, GEM (GeoInvoice Expert Matrix), is a core upstream solution that helps oil and gas businesses efficiently handle their sales tax obligations. GEM Expert Matrix includes 24 oil and gas producing states. (See GEM Blog What is a sales tax matrix?)
GEM’s key features include invoice processing, mobile field services, exemption certificate management, and sales tax compliance. With GEM, oil and gas companies can streamline their sales tax processes and ensure that they are always in compliance with the latest regulations.
In addition to GEM, GeoInvoice offers a range of other software solutions and services to help companies in the oil and gas industry manage their operations more efficiently. With a focus on geo-coordinate based sales tax, GeoInvoice provides a unique and specialized approach to solving the challenges that oil and gas companies face in this area.
GeoInvoice’s team of experienced software developers and industry experts work closely with clients to understand their specific needs and develop customized solutions that meet their unique requirements. The company’s commitment to innovation, quality, and customer service has earned it a reputation as a trusted partner to some of the biggest names in the oil and gas industry.
About Susette

Susette M. McNeel, CPA, CGMA
Susette McNeel is the president and founder of GeoInvoice, Inc.. GeoInvoice is a software development company that specializes in creating solutions for the oil and gas industry.
Susette has over 20 years of experience as an oil and gas tax professional. Susette led an indirect sales tax team for Citation Oil & Gas Corp. She was responsible for all aspects of sales and property tax for operations in thirteen states. Her achievements include obtaining oil and gas sales tax incentives. She focused on using available technology to simply and streamline the fast paced world of sales tax compliance.
Prior to her work at Citation she worked for a subsidiary of El Paso Corporation managing property tax for linear property.
Susette’s experience in the complex world of upstream sales tax compliance led her to invent an automated sales tax solution for location-based sales tax calculation at wellsites, pipelines and other points of sales without an address. Susette holds business software patents for location-based sales tax calculation. US 9,589,259 B2 and US 10, 769,611.
Publications include Texas origin-based sales sales tax sourcing and the effect on local governments located in oil and gas formations: Origin-based sales tax sourcing maximizes urban local government tax revenues. January 1, 2019.
Susette received a BBA in Finance, Magna Cum Laude from Sam Houston State University. She is a certified public accountant and certified global management accountant. Susette is a member of the AICPA, Texas Society of CPAs, Petroleum Accountant Society of Houston. For fun Susette plays tennis and the banjo.