Sreten Simic Email and Phone Number

• Manage Ethernet laboratory infrastructure.• Work closely with other engineering teams to define, design and implement end-to-end networking solutions• Provide last Tier technical support to TAC, NOC, field engineers and customers. • Support regression testing to ensure new software releases and provide vendor with new feature requirements to develop Software Maintenance Updates. • Supported various proof-of-concepts in the lab environment with customers and vendors.•… Show more • Manage Ethernet laboratory infrastructure.• Work closely with other engineering teams to define, design and implement end-to-end networking solutions• Provide last Tier technical support to TAC, NOC, field engineers and customers. • Support regression testing to ensure new software releases and provide vendor with new feature requirements to develop Software Maintenance Updates. • Supported various proof-of-concepts in the lab environment with customers and vendors.• Evaluate vendor platforms and new technologies. • Qualify various equipment and technologies in a laboratory environment for field deployments. This includes development of test requirements, test plans, test results and qualification reports.• Design Carrier Ethernet services, QoS, Ethernet CFM and loop prevention implementation in the Next Generation Ethernet Core Network.• Support Ethernet services’ rollouts by developing commissioning, provisioning and troubleshooting guidelines• Perform maintenance guidelines to diagnose and troubleshoot the Ethernet network. Show less

• Develop test plans and test cases for a new Carrier Ethernet products• Verified QoS, VCAT, LCAS, Policing/Shaping, SNMP, SDH/SONET/TDM, MLPPP, GFP, Frame relay, 802.3ad, Ethernet OAM• Work with TAC on new products, new hardware/software release

• Provided Tier III technical support to TAC, NOC, field engineers and customers. • Responded to situations where first and second line product support has failed to isolate or fix problems in malfunctioning equipment or software.• Diagnosed, debugged and troubleshoot complex network systems and/or software over the phone, email, in the lab, or on site.• Worked in System Lab on system verification, duplicating customer issues and Proof of Concept design between microwave and 3rd… Show more • Provided Tier III technical support to TAC, NOC, field engineers and customers. • Responded to situations where first and second line product support has failed to isolate or fix problems in malfunctioning equipment or software.• Diagnosed, debugged and troubleshoot complex network systems and/or software over the phone, email, in the lab, or on site.• Worked in System Lab on system verification, duplicating customer issues and Proof of Concept design between microwave and 3rd party equipment Show less

• Provided Tier III technical assistance and support to TAC, field engineers and R&D for technical consultation and customer support concerns.• Worked in System Lab on system verification, duplicating customer issues and Proof of Concept design.• Qualified OEM products based on project requirement and performed interoperability between OEM product, such as Adtran, Fujitsu, Cisco, Tellabs, Huawei, RAD, Extreme Networks and microwave systems.

• Developed test strategies, test plans, testing scenarios and documented results & reports.• Designed detailed test cases to cover all levels of test, including: functional, performance, load and stress.• Assisted in test execution.• Prepared acceptance test plan for customer products verification.• Worked with product development engineers to coordinate bug fixes and testing.• Supervised the testers assigned to the project and reporting status to the project manager

• Designed test plan and test cases for IP Reporting and IP Configuration applications.• Developed automated test cases using a shell scripting.• Performed all levels of tests including functional, system/integration, load/performance and regression testing on Unix and Sybase based applications.

• Performed system integration and verification for CDMA2000 Packet Core Network• Executed load & capacity, network stability and robustness test cases for Wireless LAN Serving Node, PDSN and HA

• Performed requirements-based Black-Box System Testing as well as Grey-Box Integration Testing for the Metro DWDM, Optical cross-connect and SONET/SDH multiplexer.• Developed and reviewed high and low-level test plans as well as traceability from requirements to test cases.• Formulated complex models using a test generation tool (TestMaster) to output manual, semi and fully automated tests that were fed into TestDirector/WinRunner repository.• Authored Interoperability test plan… Show more • Performed requirements-based Black-Box System Testing as well as Grey-Box Integration Testing for the Metro DWDM, Optical cross-connect and SONET/SDH multiplexer.• Developed and reviewed high and low-level test plans as well as traceability from requirements to test cases.• Formulated complex models using a test generation tool (TestMaster) to output manual, semi and fully automated tests that were fed into TestDirector/WinRunner repository.• Authored Interoperability test plan and performed interoperability tests with Nortel, Alcatel and Fujitsu equipment in the customer’s lab. Show less