Our Team


Douglas Goble, President

With more than 30 years in the industry, Doug has garnered sharp technical insights, acquired substantial practical experience and maintained excellent customer relations, all essential for anticipating client needs and understanding emerging industry trends. When not at work, Doug enjoys spending time with his family and practices hockey, camping and fishing. He considers himself an all-round nice guy.




Ericka Tumax, Office and IT Systems Manager

As an office and IT systems manager, Ericka organizes and coordinate office operations, human resources and management information systems and procedures. Holding more than 15 years of management experience, Ericka ensures the smooth operations of GSR and the effectiveness and efficiency of all organizational operations. In her spare time, Ericka enjoys books, music, Starbucks and good friends’ company.




Oscar Tumax, Shop Manager

Oscar organizes and coordinates shop operations and procedures in order to ensure the operations’ effectiveness and efficiency. Oscar experience includes, but is not limited to: Source driven equipment for Vibrator and Dynamite Equipment, Radio and GPS Programming, Field Service Support, Repair and Maintenance of Seismic Recording System, Manufacturing of Cable for Seismic Systems. After work, Oscar is a soccer player and loves having quality time with his family.



Darcy Mitchell, Electronics Specialists

Darcy brings to the table more than 18 years of experience. He specializes in I/O System II MRX’s, line taps, battery chargers, SCM, LIM, MK  I/ MK II/ Aries RAM and Taps, and he’s an excellent trainer. In his spare time, Darcy practices dirt biking, hockey, automobile repair and maintenance and RC modeling.




Dave Tang, Electronics Specialist

Dave has over 26 years of experience in the industry, specializing in ARAM and Sercel Equipment. Dave’s hobbies include hiking and surfing the net.





Gary Anderson




Shawn Cossar




Freddy Velez