Gary Lim Email and Phone Number
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Network Development Engineer III (NDE III) Optical at Twitch responsible for optical network architecture and capacity planning for long-haul and metro-area DWDM fiber networks. Migration strategies from 10-Gig to 100-Gig waves including platform migration. Deep-dive into different optical vendor architectures and transport technologies including DP-QPSK and DP-16QAM optical modulation. Working relationship with Trans-Atlantic, Trans-Pacific, SONET/SDH/OTN fiber carriers and carrier-neutral hotels. Excellent communications skills (written and verbal) with a penchant for hierarchical documentation.Strengths:• Fiber Optic Network Planning – Utilizing traffic capacity projection based on historical network performance data and projected new services traffic demand to develop network capacity and network service requirements with stakeholders and internal customers.• Optical Networking Technology – Layer 0 (100G DP-QPSK, 200G DP-16QAM, 300G/400G Super Channel, CDC-G network design, 100G/10G Wavelength, DWDM, ROADM, IPoDWDM), Layer 1 (OTN, SONET/SDH), Layer 2 Switching (100 GigE, 10 GigE, Metro Ethernet, MPLS) and Layer 3 Routing (OSPF, ISIS, BGP).• Multi-Vendor DWDM Systems - Network design experience with Ciena OME 6500, Cisco 15454 / NCS 2000, Infinera DTN / DTN-X. Working knowledge of ALU 1830 PSS, Fujitsu FlashWave 9500 DWDM solutions.• Supporting Circuit Operations on Dark Fiber Acquisition – Pros and cons of G.652D versus G.655 fiber type for DWDM applications. • Analysis of SRLG – Optical path switching planning for mission-critical traffic and SAN/NAS redundancy.#nointernetwithoutoptical
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Network Development Engineer Iii (Nde Iii) Optical At TwitchTwitchEnglewood, Co, Us -
Network Development Engineer Iii At Aws Border NetworkAmazon Web Services (Aws) Jan 2024 - PresentSeattle, Wa, Us -
Network Development Engineer Iii (Nde Iii) Optical At TwitchTwitch Mar 2017 - Jan 2024San Francisco, California, UsOptical Network Architecture:• Standardize Point-to-Point Optical Network Design based on span loss and system redundancy.• Introduce ROADM-based ring network for Metro Area Networks.• Presentation to stake holders on proposed new optical network design and optical network augments based on network design costs, advantages, requirements, risk mitigation of new technology/design.Standardized Optical Network Documentation for:• New optical network deployment including optical budget calculation.• Field deployment checklist with field updates.• New network configuration updates and field procedures.• DWDM Optical Network Requirements.Written Python scripts to:• Generate standard configuration for DCI Optical Transponders and Optical Line System (OLS) deployment.• Automate configuration changes on DCI Optical Transponders and OLS.• Automate data collection through DCI Optical Transponder RestAPI.Written and provided Optical Network Training and Runbooks for:• Optical Network Deployment.• Optical Network Troubleshooting including use of OTDR / OSA / Fiber Scopes.• Practical Guide to Optical Networks.Setup point-to-point OLS and ROADM Optical Lab for:• Certification testing of new DWDM components and optical network designs.• Regression testing of new software releases.• Design reference of field deployed optical networks.• Use by NRE and DC Operation engineers for training and generating what-if scenarios.• Testing Python script automation before field release.
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Principal Engineer IiCharter Communications Dec 2014 - Mar 2017Stamford, Connecticut, Us• Defining DWDM architecture for Charter's National Dark Fiber Optical Network and Metro Area Networks.• Technical author of Charter's National Dark Fiber Optical Network RFP based on 17.6 Terabit/s per fiber pair requirement. • Provided engineering support and recommendation to stakeholders for dark fiber DWDM vendor selection. Supported Circuit Operations on project rollout and network baseline.• Developed Metro Area Network migration strategy from 10-Gig 40-Channel to 100-Gig 40-Channel and 96-Channel DWDM systems with support for existing traffic demands.• Developed test criteria and procedures for evaluation of ROADM and optical amplifiers network elements. • Developing Python network automation scripts for configuration management of optical network nodes through TL1 and Telnet or SSH interface.• Developed and taught Optical Communications Foundation course to Charter Network Operations Team. -
Principal EngineerGlobecomm Systems Inc. Dec 1999 - Nov 2014Hauppauge, Ny, UsCapacity and network infrastructure management of Globecomm’s International Fiber Network – OC-48/STM-16 protected ring network connecting 11 satellite teleports and 9 carrier-hotels across US East, Europe, the Atlantic, Pacific and Middle East.o Service startup and lead network engineer for fiber network.o Design and upgrade Atlantic Ring to STM-64.o Structured vendor selection process of hardware and bandwidth services.o Responsible for negotiating OC-x/STM-x bandwidth, dark fiber, carrier-neutral hotel and IP Transit leases.o Continuous cycle of reviewing network requirements and operational characteristics with service owners, operations team and management. o Analysis and formatting of network traffic statistics into reports for service-owners, network operations and management for timely network expansion decisions.o Forecasting network capacity for mid/long term requirements with provisions for emergency bandwidth utilization.Lead Engineer for Globecomm’s WDM Network.o Designed/deployed Globecomm's New York WDM ring.o Specification of ROADM-based 100-Gig OTN ring for New York, Ashburn VA, Washington, Laurel MD. o Responsible for RFI and RFP procurement process.Lead Engineer for Globecomm’s Internet Gateway and IP Peering.o Successful application to APNIC for Globecomm's Asia Gateway BGP AS 38056 and /17 IP address allocation.o Selection and negotiated Globecomm's IP Transit carriers for New York, Amsterdam, Frankfurt and Hong Kong.o Working with AMS-IX, DE-CIX and HK-IX for Globecomm's Public Peering.Capacity and service management of Globecomm’s International Voice Service connecting three international customers via satellite links and five international tier-1 voice carriers.o Lead network designer for international voice network.o Management of voice capacity with Tier-1 voice carriers.o Responsible for service application of FCC 214 license and SS7 Point Codes.
Gary Lim Skills
Gary Lim Education Details
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Manchester Metropolitan UniversityOptoelectronic Systems -
Manchester Metropolitan UniversityElectrical And Electronic Engineering
Frequently Asked Questions about Gary Lim
What company does Gary Lim work for?
Gary Lim works for Twitch
What is Gary Lim's role at the current company?
Gary Lim's current role is Network Development Engineer III (NDE III) Optical at Twitch.
What is Gary Lim's email address?
Gary Lim's email address is gl****@****ems.com
What is Gary Lim's direct phone number?
Gary Lim's direct phone number is +120390*****
What schools did Gary Lim attend?
Gary Lim attended Manchester Metropolitan University, Manchester Metropolitan University.
What skills is Gary Lim known for?
Gary Lim has skills like Bgp, Mpls, Dwdm, Network Design, Voip, Sdh, Computer Network Operations, Ospf, Metro Ethernet, Sip, Qos, Cisco Technologies.
Who are Gary Lim's colleagues?
Gary Lim's colleagues are Arragash Streaming, Diego Aguayo, Noah James, Bret Deluca Campion, Natalie Wing-Tang, Diogo Soares, Joel Westerberg.
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