System testing engineer

YUN ZHENG

SUMMARY

Broadly skilled professional with significant experience in cellular and telecommunication industries and with particular strengths in system testing. Reviewed customers' requirement, developed test cases, implemented test cases and provided results to internal and external customers. SQL Scripting and Unix shell scripting. Work experience covering a diverse range of hardware and software knowledge including Unix/Linux, client/server, Citrix, TCP/IP, DNS, DHCP, databases, SQL, Java, HP OpenView, SNMP, LDAP, RBAC, Microsoft windows and applications etc.

EXPERIENCE

Nokia Seimens Networks/Motorola Inc. (Aug. 2010 ~ Sept. 2012)

Sr. Solution Engineer

• Utilized Unix, SQL and network knowledge/commands with reviewing logs to identify and analyze customer network/server issues related to design, maintenance, operation and performance for AEMS(Solaris platform, IBM x3650T server and PC clients with Microsoft windows and applications), OMCR(Solaris system) and Cisco switch

• Provided outage recovery, root cause analysis, system upgrade and solutions to issues via phone call, email, remote access and Net-meeting.

• Used Remedy and Clarify for tickets management. Drove all cases to closure within the cycle time goals.

• Configuration/Operation&Performance/Maintenance/Upgrade support of CDMA management network/server. Developed Unix shell scripts to monitor system performance.

• Collaborated with the development, field engineer, Oracle, IBM, HP and other third-party vendors to resolve issues and analyze root cause for customers – Verizon Wireless, Sprint, Alltel etc. Received high satisfaction from customer evaluation

• Ready for NetAct - LTE Network Element Management System support

Motorola Inc. (July 1999 ~ Aug. 2010)

Sr. WiMax System Engineer (Jan. 2007 ~ Aug. 2010)

• Integrated and configured WiMax network for testing and debugging

• Developed test cases based on customers’ requirement, implemented testing, which included simple IP, mobile IP, basic VOIP, service flow, ARQ, HARQ, throughput, scheduling, power control, Antenna diversity, MIMO, end to end QoS, network entry etc.

• Provided test results to internal and external customers, and managed testing projects

• Configuration/Operation&Performance/Maintenance/Upgrade support of WiMax system: AP(Linux platform), CAPC(Emerson ATCA platform), AAA(Sun Platform), EMS(Sun Platform) and other products. Provided solutions and outage recovery in software and hardware in a timely manner for customers – Clearwire and other domestic and international companies. Received high satisfaction from customer evaluation

• Collaborated with the development, Oracle, Emerson and other third-party vendors to resolve software and hardware issues and analyze root cause for customers

Sr. iDEN System Engineer (May 2002 ~ Jan. 2007)

• Identified and troubleshot customer site issues related to the design, maintenance, operation and performance.

• Provided solutions and outage recovery to all software and hardware issues of the iDEN OMC-R(Solaris system) and Packet Switch to our customers – Nextel/Sprint

• Collaborated with the development, Oracle, and other third-party vendor development organizations to resolve software and hardware issues

• Tracked and summarized top issues and presented them to the management and customers for review on weekly basis

• Considered as a go to person for the products support. Trained team members. Received high satisfaction from customer evaluation

Sr. System Test Engineer (July 1999 ~ May 2002)

• Integrated and configured Cable Telephony System and Broadband Voice over IP network

• Used various test equipments such as spectrum analyzers, call generators, and software tools for system testing

• Collaborated with the development team to resolve product issues. Used IBM ClearQuest tool for real time reporting problems and status

• Reduced Cycle time 25%-33% across three different test projects by developing a quality test matrix, test plans and test reports. Received Bravo rewards from management by outstanding leading projects

• Developed UNIX scripts, test cases and implemented system testing for Cable Telephony System and Voice over IP system before software and hardware releases. Met customers deliverable due dates at all times and saved million dollars for the company

ALLTEL Communications/360 Communications (January 1996 ~ July 1999)

RF Engineer (July 1998 ~ July 1999)

• Designed and implemented CDMA network by conducting spectrum clearing, testing single cell function, configuring antenna, planning PN offset and planning pilot power

• Planned and designed new cell sites. Tasks performed include site selection, frequency planning, antenna configuration, link budget calculation and transmitter testing.

• Improved call quality by successfully implementing system-wide frequency retuning

• Provided frequency coordination and extension agreements for neighboring carriers

• Provided a yearly network growth plan for use by project engineering and field personnel

• Used various tools such as Wizard, Comarco, NDR, Mapinfo etc to design and optimize the network

• Enhanced the network quality by studying drive test and traffic data report for RF coverage and interference issues

Sr. Traffic Engineer (Jan. 1996 ~ July 1998)

• Closely monitored and analyzed cell site traffic statistics to maintain a two percent grade of service standard

• Developed a method to analyze cell traffic trend data to justify capacity, coverage and quality for the network

• Provided support to RF engineering, project engineering, field engineering, and financial groups by producing and analyzing cell site statistic data reports

• Administrated FoxPro Database and maintained the server

• Developed cell site statistic reports using UNIX shell script, SQL and programming language

• Designed and developed a CDMA cell traffic database for engineering using C, SQL and FoxPro

EDUCATION

Bachelor of Science in Computer Science (December 1995)

Illinois Institute of Technology

CERTIFICATION

Sun Certified System Administrator Solaris 8, CompTIA Network+, Master certification in Management in a changing environment in Benedictine University. Preparing CCNA test now

SKILLS

Operating System MS-DOS, MS-Windows, NetWare, UNIX, Linux.

Languages C, SQL, UNIX Shell.

Databases Oracle and Informix.

Applications Relational Database Applications - Access, MS Office Suite Applications

Amdocs Clarify, BMC Remedy, and IBM ClearQuest

Protocols TCP/IP, UDP, SNMP, Network Call Signaling, DOCSIS, IEEE 802.11 and IEEE 802.16

Systems PC, Cable Modem, Cable Router, IP Gateway, Switching, AMPS, CDMA, iDEN, WiMax, Cisco and Redback router and switch

Contact this candidate