David Mattern
Voice Systems Engineer at Marco Technologies | Green Bay, Wisconsin, United States
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Tax payer at City of Green Bay in January 1981 to Present
Voice Systems Engineer at Marco Technologies in January 2019 to Present
Product Specialist/Sr. Technician at Enterprise Systems Group in November 2008 to January 2019
Sr. Technician at Bacher Communications, Inc. in February 1991 to October 2008
Franchisee at Subway in January 1991 to January 2000
Installation and Repair technician at General Telephone & Electronics Corporation in January 1987 to January 1991
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California Superbike School, Completion Level 4 Continued Education, August 2026
Wisconsin Indianhead Technical college, Diploma, August 1986 to August 1987
Abbot Pennings Highschool, August 1974 to August 1976
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VoIP
Telecommunications
Switches
Wireless
Telephony
Networking
Unified Communications
TDM
Cabling
Servers
IP
Troubleshooting
SIP
WAN
MPLS
Call Centers
Managed Services
Cisco Technologies
Sales Engineering
LAN-WAN
Solution Selling
Ethernet
SIP Trunking
Telecommunications Engineering
Customer Support
Wireless Networking
Sales Operations
Video Conferencing
Outside Plant
IVR
Telecom Technologies
Call Center
Wireless Technologies
PBX
Voice over IP (VoIP)
Sales Support
Internet Protocol (IP)
LAN/WAN
Mitel
OAISYS
Pre/Post Sales Engineers
Telecommunications Systems
Multiprotocol Label Switching (MPLS)
Session Initiation Protocol (SIP)
Wide Area Network (WAN)
Cisco Systems Products
Contact Centers
Unified Messaging
Hosted Voice
Customer-Premises Equipment (CPE)
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Discover more about Marco TechnologiesWhat is David M Mattern email address?
Email David M Mattern at [email protected], [email protected] and [email protected]. This email is the most updated David M Mattern's email found in 2026.
What is David M Mattern phone number?
David M Mattern phone number is 9209889222 and 920-687-4388.
How to contact David M Mattern?
To contact David M Mattern send an email to [email protected], [email protected] or [email protected]. If you want to call David M Mattern try calling on 9209889222 and 920-687-4388. (updated on October 10, 2025)
What company does David Mattern work for?
David Mattern works for Marco Technologies
What is David Mattern's role at Marco Technologies?
David Mattern is Voice Systems Engineer
What industry does David Mattern work in?
David Mattern works in the Information Technology & Services industry.
David Mattern Email Addresses
David Mattern Phone Numbers
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