SUMMARY

• Thorough professional with in - depth knowledge in trouble shooting telecommunications networks to help operating companies attain and maintain carrier class service.
• Excels in planning, writing and execution of test plans to validate new features, opening trouble reports for new software features (call processing, mobility,
• Fault management, configuration management and performance management).
• Extensive knowledge in the testing of various messaging protocols, emergency technical assistance in the recovery of live wireless telecommunications systems.
• A committed team member who takes initiative to mentor others, proactively identifies and resolves problems quickly; adapts to change.

TECHNICAL SKILLS

• Protocols: SIP (Session Initiated Protocol) for Wireless Circuit Switch to Packet Switch interworking for VoLTE Mobiles in LTE Evolved Packet Core networks, SIP-I (ISDN User Part trunks (ISUP) encapsulated in SIP), Legacy ISUP, PRI, M3UA, 3G RANAP, 2G BSSAP, GSM CAMEL, ANSI41 MAP, LNP, H248 Megaco, ATM; Iu, IuR, Nb, Mb, SGs, and Sv interfaces, SIGTRAN, OC-3 SONET, ETSI SDH and Gig-Ethernet transport systems.
• Networks: IMS (Ip Multi-Media Subsystem), Circuit Switch PLMN and PSTN.
• Software: Unix, Linux, Microsoft Word, Excel, PowerPoint

PROFESSIONAL EXPERIENCE

Confidential, Richardson, TX

Responsibilities:

• Validated testing of software upgrade and testing of MSC / MGCF software features in the AT&T labs at Redmond, WA and in AT&T live networks.
• This included writing, review with Customer Engineers and execution of test plans.
• For any issues that were found was collected, and trouble tickets were opened and provided to support engineers to facilitate corrective action.
• Validation of Customer Visible Design Feature documents, Implementation documents and product description documents for the GSM-N MSC/MGCF and Media Gateway nodes.
• This included the introduction of Media Gateway Control Function on the GSM-N Call Server to support Circuit Switch to Packet Switch functionality to interwork PSTN, GSM 3G and 2G mobile with 4G VoLTE mobile in the LTE Evolved Packet Core network.
• Introduction of the Ericsson Mobile Media Gateway to support IpV6 bearer between the Wireless Circuit Switch Network and the Wireless Packet Switch Network.
• Customer Lab testing on support of the GSM-N Call Server with Nokia (Alcatel-Lucent) 3G RNCs.
• Customer Lab testing on support of SIP-I interworking between the GSM-N Call Server and SONUS network equipment.
• Customer Lab testing of E911 calls using GLONASS satellites in addition to A-GSM satellites to provide more accurate resolution of mobile location.
• Exposure to the orchestration of the Virtualized GSM-N MSC / MGCF through OpenStack.

Confidential, Richardson, TX,

Responsibilities:

• Performed worldwide Emergency Outage Recovery activities on IMS, LTE & CDMA, UMTS Networks.
• Troubleshot Sun servers Hardware and Software anomalies on UNIX and LINUX systems.
• Quickly resolved Emergency technical network outages for Access, Core and Ran equipment.
• Isolated hardware and software faults within the communications network and initiated recovery steps.
• Provide expert post-sales support of software and hardware systems, sub-systems and applications for customers or field personnel utilizing telephone and remote diagnostic capabilities.
• Collect accurate and analyze outage/degradation causes
• Assist customers with installations and upgrades.
• Identify and recommend additions or deletions of support toolsets and requirements to customers
• Partnered with customer executive management to explain root cause analysis
• Develop sessions and provide mentoring for engineers on team
• Supported Verizon, AT&T, Sprint, US Cellular, etc.

Senior Engineer - Software validation

• Validated the software upgrades of the Nortel Versatile Service Engine (ATCA) based GSM 2G-3G Mobile Switching Wireless Call Server in the AT&T Wireless network, followed by testing of new features provided by the new software loads.
• Validated the introduction of the Nortel Versatile Service Engine (ATCA) based GSM 2G-3G Mobile Switching Wireless Call Server in the ENMR - Plateau network at Clovis, New Mexico.
• Validated the introduction of the Nortel Versatile Service Engine (ATCA) based GSM 2G-3G Mobile Switching Wireless Call Server in the ETSI network at CLARO in Guatemala, Guatemala.
• Validated of the introduction of the Nortel Versatile Service Engine (ATCA) based GSM 2G-3G Mobile Switching Wireless Call Server in the ETSI network based at Nextel International in Santiago Chile.
• Validated of the introduction of the Nortel Versatile Service Engine (ATCA) based CDMA MTX Call Server in the Verizon Network at Akron Ohio.
• Validated the introduction of the R4 Network at AT&T Wireless with the Nortel XA-Core with the Passport 15K VSP4e Media Gateway peripherals, supporting Voice over ATM.
• Validated the initial introduction of the R4 Network at AT&T Wireless with the Nortel XA-Core with the Passport 15K VSP2W Media Gateway peripherals, supporting Voice Over ATM.
• Validated call processing features on the Nortel GSM Mobile Switching Center in at Telecommunications Operator O2 in Munich Germany.
• Validated the Nortel CDMA Mobile Telephone Exchange (MTX) and CDMA access equipment in the Sprint PCS Wireless Network, along with the introduction of the Passport 15K to provide ATM connection between the Legacy CDMA Consolidation and Distribution Units.