John Holderman Email & Phone Number
Firearms Instructor
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John Holderman Location
- Allen, TX, US
John Holderman Work
- Firearms Instructor @ Texas Legends Gun Range and Training Center, LLC (July 2023 - Present)
- Sales Specialist @ (July 2021 - Present)
- Client Implementation Project Manager @ (January 2017 - September 2017)
- Project Manager @ (August 2016 - January 2017)
- Student @ (February 2015 - January 2017)
- Project Manager @ (July 2013 - December 2014)
- Implementation Project Manager @ Ericcson Inc (October 2010 - November 2012)
- Office Clerk; Quality Control @ (January 2009 - October 2010)
- Telecommunications Consultant: Network Integrator and Project Manager @ I-Tech Consulting (February 2005 - October 2006)
- Installer @ Northstar Networks (November 2004 - February 2005)
- System Integrator @ Cingular (June 2004 - July 2004)
- Network Integration Readiness and Project and Implementation Manager @ Nortel Networks (December 1996 - May 2004)
- Computer and Telephone Systems Manager @ U.S. Air Force (February 1977 - March 1997)
- Telephone and Computer Systems Operations and Maintenance @ (February 1977 - February 1997)
John Holderman Education
- Keller School of Management, DeVry University
Master (Business Administration)
2007-2007 - DeVry University
BS Technical Management (Technology)
2006-2006
John Holderman Skills
- Telecommunications
- Wireless
- Project Management
- Program Management
- Integration
- LTE
- Networking
- UMTS
- GSM
- Management
- Project Planning
- Team Leadership
- Quality Assurance
- Process Improvement
- Troubleshooting
- Mobile Devices
- TCP/IP
- Cisco Technologies
- IP
- Leadership
- 3G
- Unix
- Linux
- VoIP
- Routers
- Cross-functional Team Leadership
- System Deployment
- Vendor Management
- Nortel DMS
- Ethernet
- Network Design
- Switches
- Training
- ATM networks
- SS7
- Computer Network Operations
- SIP
- Testing
- Disaster Recovery
- CDMA
- Cellular Communications
- Fiber Optics
- Broadband
- 4G
- Wireless Networking
- RF
- WCDMA
- Telephony
- PMP
- Consulting
- Cell
- Business Analysis
- Software
- Microsoft Excel
- Cross Functional Team Leadership
- Toastmasters
- Frontier
- Hardware
John Holderman Summary
- John Holderman, based in Allen, TX, US, is currently a Firearms Instructor at Texas Legends Gun Range and Training Center, LLC. John Holderman brings experience from previous roles at Cabela's, Careington International Corporation, NextCareer - Download our new App Journey2 NC for Careers and Collin College. John Holderman holds a 2007 - 2007 Master in Business Administration @ Keller School of Management, DeVry University. With a robust skill set that includes Telecommunications, Wireless, Project Management, Program Management, Integration and more. John Holderman has 1 emails and 1 mobile phone numbers on RocketReach.
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