Maryland Department of Natural Resources

MGS Staff Directory

Name Telephone
Richard A. Ortt, Jr., Director (410) 554-5503
Jeanne Gary, Administrator (410) 554-5511
Dorothy M. Holmes, Services Assistance (410) 554-5512
Publications Office (410) 554-5500, (410) 554-5501
Glen Shinholt, Maintenance Engineer (410) 554-5564
Coastal and Environmental Geology Program
Stephen Van Ryswick, Chief (410) 554-5544
Rebecca H. Kavage Adams, Geologist (410) 554-5553
Dr. David K. Brezinski, Geologist (410) 554-5526
Katherine A. Offerman, Geologist (410) 554-5543
Dale W. Shelton, Education Specialist/Geologist (410) 554-5505
Elizabeth R. Sylvia, Geologist (410) 554-5542
Hydrogeology and Hydrology Program
David W. Bolton, Chief (410) 554-5561
Dr. Jon Achmad, Hydrogeologist (410) 554-5556
David C. Andreasen, Hydrogeologist (410) 260-8814
Johanna Gemperline, Hydrogeologist (410) 554-5552
Heather Quinn, Geologist (410) 554-5522
Andrew Staley, Hydrogeologist (410) 260-8818
Support Services
SECURITY OFFICER (410) 554-5508 — —
MGS FAX NUMBER (410) 554-5502 — —
Maryland Geological Survey 2013:
Front Row (left to right): Dave Bolton, Darlene Wells, Jeff Halka (Director Emeritus), Lindsay Keeney, Dona Appel, Elizabeth Sylvia.
2nd Row (left to right): Rich Ortt (Director), Bruce Michael (Director, DNR Resource Assessment Service), Jon Achmad, Dave Drummond, Katherine Offerman, Jeanne Gary, Jim Reger (retired).
3rd Row (left to right): Andy Staley, Kate Burgy, Heather Quinn, Cindy Lang-Bachur (retired), Steve Van Ryswick.
Back Row (left to right): Dave Brezinski, Bob Conkwright, Rick Younger, Dale Shelton.
Not pictured: David Andreasen, Dorothy Holmes, and Glen Shinholt

See an interactive display of MGS staff over the years