Home / Staff & Expertise

Hydrologists/
Hydrogeologists/
Geologists

Engineers
GIS/Database/
Environmental
Specialists
Administrative
Personnel
Thomas J. Osborne, P.H.
Professional Hydrologist
President

Joel Adams
Senior Hydrogeologist
Red Lodge Office

Monte Smith, P.G.
Senior Hydrogeologist
Billings Office

Paul Sydorenko, P.G.
Geologist
Billings Office

John Wilson, C.P.G.
Senior Hydrogeologist
BillingsOffice

David Donohue, P.G.
Senior Hydrogeologist
Manager Helena Office

Shane A. Bofto
Senior Chemical/ Environmental Engineer
Deputy Operations Manager
Billings Office

Eric Detmer, P.E.
Project Engineer
Manager Sheridan Office

Luke Osborne,
P.E.

Project Engineer
Helena Office

Mark Nitz, C.E.I.
Geologist I & GIS/Computer Systems/IT Management
Billings Office

Jill Branch
Geologist/GIS Database Specialist
Billings Office

Dennis Elliott
Environmental Specialist
Billings Office

Stephanie Anderson
GIS Specialist I
Billings Office

Shawn Stevens
Assistant Scientist
Sheridan Office

Rye Svingen 
Hydrologic Technician II
Billings Office

Marisa Martin
Hydrologic Technician II
Sheridan Office

Jeannie Riddle
Business Manager/
Contract Specialist
Billings Office

Shannon Persoma
Administrative Assistant
Billings Office

Bev Soria
Office Clerk
Billings Office