SUMMARY:

• Eighteen years’ experience in system integration including all cycles of software/features development. EPC and device development and testing over 2G, 3G, LTE, WCDMA, & UMTS. Supports testing and integration team efforts during execution of test plan. Participated in design and development cycles. Responsible for developing Requirement Test Plan, MOPs and, Release Test Results. IBM Cognos Analytics - KPI, bandwidth and traffic analysis/capacity reports.
• Working knowledge using PDSN, HA, AAA Bridgewater; SUN/Oracle LDAP, EPC nodes interfaces, and IMS/VoLTE packet core systems integration/validation E2E.
• Test Tools: JDSU traffic analyzer. Iris session analyzer. Software Developer Python, C, and Bash scripts proficient. Proficient in Unix/Linux, VMware-cloud environments.
• Technologies and architecture knowledge acquired from Confidential &T, E///, Sprint, Motorola, Qualcomm, T-Mobile, and Confidential Laboratories.

PROFESSIONAL EXPERIENCE:

Confidential - Bellevue, WA

PS Resident Engineer

• The SA (system administrator) is part of the monitoring team Confidential T-Mobile, a group that supports End Users and Tier 2 support (local administration) personnel.
• SA is responsible for User Management that includes but not limited to Adding and deleting users, modifying user’s privileges/data and providing support to users.
• SA is responsible of Configuration Management reflected in the corresponding Deployment Workbooks E.g. Map/Topology Management includes manual changes to Network Elements (STPs, SSPs etc.) & Probe Configuration. Link Changes adding/removing and checking availability of monitored links. Updating link info (e.g. point codes, IP addresses for RNCs, SGSN Control Plane and User Plane IP ranges, Abis RSL/timeslot/BSC connections, etc.).
• Alarm Resolution, performing health-checks (logs, processes, disk space…) Opening, Resolving Supplier trouble tickets (Clarify). Analyzing & escalating alarms from GeoProbe/IRIS System configurations.
• Liaison with T-MOBILE Tier 2 and End Users. Liaison with Supplier Customer Operations Staff Database and Server Administration.
• Systems Topology and monitoring/reporting per traffic protocols.
• Configure Deep Packet Classification, which supports hundreds of unique applications (http, VoLTE, H.248, MOS) that might affect subscribers’ experience.
• Configure using trending, thresholding and alarming functions to notify when service levels fall outside set expectations.
• Monitor network across virtual and physical networks for quick system integration.

Confidential- Guatemala City

Manager/Lead Engineer

• Oversee a team that provides and maintain computers systems and system/software upgrades. Install Network for small business and applications.

Confidential, Bellevue, WA

Sr. VoLTE Device Design Engineer

• Responsible for device test strategies and test plan scenarios. Setup test environment.
• Integration and development of Qualcomm IMS stack chipset solution with OEM’s HTC, Sony, which includes IMS session call flow and messaging towards PCEF/PCRF interfaces.
• Coordinate chipset development with several chipset vendors, like Qualcomm, MediaTek, LG and Samsung towards IMS VoLTE stack and Wi-Fi solution.
• Validate VoLTE voice quality under different network condition.

Confidential - Toronto, ON

Sr. Engineer

• Analyze, design and author use cases, technical requirements, and test plans for native Voice over LTE (VoLTE) and Rich Communication Services (RCS).
• Execute and troubleshoot test cases for VoLTE issues and RCS features. Including IMS session call flow and messaging towards PCEF/PCRF (Gx and Rx) interfaces.
• Responsible of device test plan requirements creation.
• Provide project coordination and management support, and ensure comprehensive and effective information communication across various project organizations to meet deadlines

Confidential - Redmond, WA

Technical Lead

• Administer platform architecture (Aggregated gateways) that supports IP messaging services over LTE and IMS. Also, CS legacy SMS services.
• E2E system test integration; coordinate FOA for new software loads.
• Enable operator to offer enhanced user experiences with voice, video, rich communications, and converged IP messaging and signaling Gx and Rx PCEF/PCRF interfaces support.
• Confidential core network solutions provide technologies such as enhancing Converged Voice and Video solutions for Voice over LTE (VoLTE), Mobile VoIP (Voice over WiFi), Mobile Video calling/conferencing and Telepresence.

Confidential- Redmond, WA

Sr. Test Engineer

• Analyze, design and author use cases, technical requirements, and test plans for native Voice over LTE (VoLTE) and Rich Communication Services (RCS) clients.
• Preparation and execution of test instructions and update automated test suites (Quality Center) as outlined in IMS/SIP Test Plan and LTE EPC for E2E systems integration.
• Execution of test instruction in an IOT RF environment.
• Verified and troubleshoot network functionality per industry standards 3GPP, including IMS session call flow and messaging towards PCEF/PCRF interfaces.
• Collect traces from the EPC network nodes, using JDSU probes, and export them to Wireshark, for future analysis, verification and troubleshooting. Analyze SS7 signaling from MSC, HLR and then the PSTN gateway using Access-7 tool over IP/TCP and UNIX. Capture Rx and Gx, DIAMETER traffic using Spirent, JDSU and Tektronics (IRIS) tools.