We are Landmark Equipment, a proud dealer of Ariens power equipment. We serve the Cleburne , TX area, providing the knowledge and superior customer service you need to get the job done. FAMILY OWNED AMERICAN MANUFACTURER SINCE 1933. Software proficiency includes Landmark ARIES, OpenWells, TOWcs, OFM, PEEP, HIS Enerdeq, Petra, and Microsoft Access, Excel, Word, and Power Point. Engineering Technician - TE705 Reservoir Economics Supervisor with bachelor's degrees in international business and computer science, and 16 years of experience working for a small independent 2 Aries User Guide User Information Aries Series products and the information in this user guide are the proprietary property of Parker Hannifin Corporation or its licensers, and may not be copied, disclosed, or used for any purpose not expressly authorized by the owner thereof. ABOUT THE TRAINING MANUAL This manual was updated on September 20, 2016. The information and screens represented in this manual reflect the PHDWin Program Version 2.10. Slight modifications may have been made to previous builds, and additional builds in the future may also affect the procedures contained within this document. 1. level 1. · 3 yr. ago. The thing with reservoir engineering is there are typically 2 groups. Technical studies (numerical sims. I.e eclipse, cmg) and economics (i.e aries, phdwin) groups. I have worked in both. And i totally understand not being marketable with only technical studies under your belt.