Steven Zotto
Senior Geologist, Vice President
Steven C. Zotto joined DeGolyer and MacNaughton in 2020. Prior to joining D&M full time, he served the firm as an intern. He has 6 years of experience in the industry.
Zotto earned his bachelor’s degree in geology from Oklahoma State University in 2016 and his master’s degree in geology from the University of Kentucky in 2019. He is a member of the American Association of Petroleum Geologists, in which he served as student chapter president at the University of Kentucky. He is also a member of the Society of Petroleum Engineers and Dallas Geological Society. Zotto is a licensed professional geologist in the state of Texas. He was named a Vice President of D&M in 2025.
Geographical Experience
- Azerbaijan
- Ghana
- India
- Indonesia
- Kazakhstan
- Kuwait
- Russia
- Saudi Arabia
- Ukraine
- United Arab Emirates
- United States
- Uzbekistan
Topical Areas of Expertise
- Reserves and resources estimation
- Subsurface mapping
- Reservoir characterization
- Geocellular modeling
- Prospective resources analysis
- Seismic interpretation
Major Projects
At D&M, Zotto has contributed to numerous global projects, concentrating mainly on subsurface mapping and classifying reserves and resources in accordance with SEC and PRMS requirements. He has extensive experience in assessing in-place hydrocarbon volumes, both deterministically and probabilistically, within clastic and carbonate reservoirs across numerous basins worldwide.
Zotto contributed to the independent assessment and historical booking of proved reserves in Saudi Arabia’s Jafurah Basin through establishing consistent continuity and performance of unconventional resources.
Some of Zotto’s earlier work included seismic interpretation, probabilistic volume estimation, geologic risk assessment, and exploration portfolio optimization of prospective resources in the Timan-Pechora Basin in Russia and unconventional basin modeling in Kuwait. He is skilled in various geoscience software tools, including Petrel, Trinity, and Kingdom.
