About Us

StructureSolver LLC was founded as an independent application development and consulting company in the energy business.

Our Mission

We strive to help our customers solve difficult problems by providing creative technology that is genuinely simple to use.

We Welcome Inquiries

  • To obtain more information about our company or about StructureSolver, use the Contact Us menu above
  • For support of our software products, use the Support/Website Support menu item.
Our Team

Alan Nunns

Alan is the president and co-founder of StructureSolver LLC, and the principal developer of StructureSolver.  Alan worked for Chevron for 24 years with the following responsibilities:

Developer for Chevron's first 2D interactive seismic interpretation system

Team leader basin analysis and founding co-leader of Chevron Structural Geology research team

Led the structural  framework definition for Chevron's 3D acreage in Nigeria.

Managed earth science for Chevron's largest asset area in Nigeria. Developed and used innovative geological, geophysical and drilling technologies to increase production by over 20%.

Global IT Manager for Chevron Overseas Petroleum.

General Manager of Global Technology and Strategy, responsible for the evolution and transformation of Chevron's Global Information Technology Systems.

Alan retired from Chevron in 2006, and serves on government, university and private company boards.  Alan has a PhD in Marine Geophysics from the University of Durham, UK, where he was a Commonwealth Scholar from New Zealand.  Alan is a lifelong backpacker and enjoys skiing in the Sierras and sailing.

Mary Rogan

Mary is a co-founder of StructureSolver LLC and  is the operational and financial officer of the company. Mary has worked as a geophysicist in the energy industry for 27 years, both as an employee for Chevron, and as a consultant. Her expertise ranges from satellite gravimetry to reservoir modeling.

Principal developer of Chevron's first interactive system for development geology and production support.

Expert in object-oriented design, interactive user interface design, and in the deployment and support of technical software packages.

Microsoft Certified Technology Specialist.

Mary has a PhD in Geology from the University of Auckland.    She is a keen runner, hiker, and skier. 


 Nate Eichelberger
Nate joined StructureSolver in 2014 after completing a PhD in Geosciences at Princeton University.  Nate's responsibilities include academic outreach, development and presentation of geologic case studies, training and consulting, and contribution to StructureSolver's technical development.
Nate is a native of Alaska.  He studied geology at Bates College where he received the Louis Jordan Jr. Award for Outstanding Senior Thesis in Geology.
Nate's PhD research at Princeton focused on constraining the 3-D kinematics of the central Andean orocline to model the history of crustal thickening at the Altiplano plateau. The project involved extensive geologic mapping in Bolivia, development of balanced cross sections, thermochronology, micro-scale strain analysis, and map-view reconstructions performed in Arc-GIS.
Nate enjoys surfing, kayaking, hiking, skiing and generally spending as much time possible in the outdoors.

Selected Publications

Eichelberger and McQuarrie (In Press), 3-D finite strain at the central Andean orocline and implications for grain-scale shortening in orogens, GSA Bulletin

Eichelberger and Guzofski (2013), Deepwater Angolan toe-thrust kinematics and structural styles, AAPG Annual Conference and Exhibition, Houston, Texas.

Eichelberger et al. (2013), Tracking crustal thickness changes during central Andean deformation, Abstract T43H-02, AGU Fall Meeting. (received Outstanding Student Presentation Award in Tectonophysics)

Eichelberger et al. (2013), New constraints on the chronology, magnitude, and distribution of deformation within the central Andean orocline, Tectonics, v. 32, doi: 10.1002/tect.20073

Eusden et al. (2011), The Dillon and Acheron sinistral faults, Marlborough fault system, New Zealand: Field studies and mechnaical modeling, New Zealand Journal of Geology and Geophysics, doi: 10.1080/00288306.2011.690768