Eli Grelecki Email & Phone Number

Greater Seattle Area

We pioneer cutting-edge trading algorithms for futures, options, and stocks. Our precision-focused strategies unlock hidden potential within data, delivering unparalleled success in the financial markets.

Greater Seattle Area

• Lead Network Engineer on a multi-million dollar 35+ site enterprise wide network hardware and cabling refresh project.• Responsible for the implementation, support, and maintenance on all Cisco network equipment such as routers (3925, 2911 ISR G2), switches (4500x, 3850, Nexus 5k and 2k FEX), firewalls (5505, 5512, 5545x), wireless controllers (2504, 5508), and access points (2602).• Implement EIGRP Dynamic routing for Great Dane internal LAN and BGP redistribution with MPLS provider.• Engineer a dual MPLS carrier design at 3 main sites using BGP routing to enable route sharing for extra redundancy. • Configure IPSEC VPN tunnels over backup Internet connections for increased availability. • Configure VSS on all 4500x switches to reduce switch management overhead and to increase redundancy at the core layer.• Utilize Cisco Stackwise technology on all 3850 access switches to reduce management overhead as well as increase redundancy at the access layer. • Configure Port-Channels and Layer 3 MEC for increased bandwidth and availability. • Implement and manage a DMZ network on both firewall pairs in the Data Centers to increase security for our public facing servers.• Perform IOS Upgrades to prevent known bugs and unlock new feature sets for all hardware platforms.• Enhance Network Security by using ACL’s and Cisco ISE.• Work closely with key Manufacturing Engineers designing and troubleshooting a new way to wirelessly connect manufacturing floor equipment to our network for better monitoring and data capture.• Implement a new IP and VLAN scheme to segregate management, users, and a variety of devices for ease of administration, improved security, and reduce broadcasts for increased performance.• Responsible for leading and overseeing the entire network project including interfacing with cabling contractors and making sure the decisions that are made are in Great Dane’s best interests for long term growth and scalability.

Madison, Wisconsin Area

CDW is an Information Technology solutions provider serving customers throughout the United States and Canada. It is our mission to provide our customers with direct access to emerging technology products and services necessary to drive real business outcomes. We get IT and strive to serve as an extension of our customer's business.

Greater Chicago Area

• Lead Network Engineer on a multi-million dollar 35+ site enterprise wide network hardware and cabling refresh project.• Responsible for the implementation, support, and maintenance on all Cisco network equipment such as routers (3925, 2911 ISR G2), switches (4500x, 3850, Nexus 5k and 2k FEX), firewalls (5505, 5512, 5545x), wireless controllers (2504, 5508), and access points (2602).• Implement EIGRP Dynamic routing for Great Dane internal LAN and redistribute into BGP with our MPLS provider.• Engineer a dual MPLS carrier design at 3 main sites using BGP routing to enable route sharing for extra redundancy. • Configure IPSEC tunnels over backup Internet connections for increased availability. • Configure VSS on all 4500x switches to reduce switch management overhead and to increase redundancy at the core layer.• Utilize Cisco Stackwise technology on all 3850 access switches to reduce management overhead as well as increase redundancy at the access layer. • Configure Port-Channels and Layer 3 MEC for increased bandwidth and availability. • Implement and manage a DMZ network on both firewall pairs in the Data Centers to increase security for our public facing servers.• Perform IOS Upgrades to prevent known bugs and unlock new feature sets for all hardware platforms.• Enhance Network Security by using ACL’s and Cisco ISE.• Work closely with key Manufacturing Engineers designing and troubleshooting a new way to wirelessly connect manufacturing floor equipment to our network for better monitoring and data capture.• Implement a new IP and VLAN scheme to segregate management, users, and a variety of devices for ease of administration, improved security, and reduce broadcasts for increased performance.• Responsible for leading and overseeing the entire network project including interfacing with cabling contractors and making sure the decisions that are made are in Great Dane’s best interests for long term growth and scalability.

Chicago, Il

• Responsible for the design, implementation, support, and maintenance on all network equipment including routers, switches, firewalls, wireless controllers, and access points.

Chicago, Il

• Responsible and accountable for the coordinated management of multiple projects directed towards high performance trading networks and managed services for direct access to financial markets.• Work closely with clients to plan, execute, and complete projects according to strict deadlines within budget.• Utilize Salesforce to create and maintain cases, create accounts, submit capital expenditure requests, and provide weekly status updates to high profile clients.• Plan, develop, and communicate comprehensive project plans and scope of work documents specifying goals, detailed work breakdown structures, scheduling, risks, and contingency plans.

Madison, Wisconsin

• Tier 4/5 support for the National Transport Network servicing thousands of small and large business customers as well as millions of home-users. Advices the NOC, Corporate IT, and field Engineers across the country for network and non network related issues.• Continual improvement and support of the corporate WAN, national backbone, and data center infrastructure. • Key member of the field deployment team which entails onsite national backbone installs and upgrades.• Exposure to extremely large-scale BGP & IS-IS routing.• Configure, maintain, and support network devices such as Routers, Switches, VPN devices, Wireless Access Points, and F5 Load Balancers.• Configure Cisco routers and layer 3 switches for fiber and MPLS circuits as well as Cisco layer 2 switches utilizing Trunks or Ether-channel connectivity.• Up to date with best practice security configuring ACL’s on Cisco Routers and utilizing Cisco ASA Firewalls.• Upgrade Cisco IOS on a wide range of platforms to ensure Corporate QoS Compliance is met. • Work with multiple vendors and video platforms to create and maintain a VOD (Video on Demand) network throughout the country.• Extensive experience with multicast networks including design and troubleshooting (PIM, SM, DM).• Transport technologies include SONET (including EPOS, ML, and XPonder) & ROADM on the Cisco ONS & Infinera platforms, MPLS/VPLS, and Cisco routing and switching on anything from the ME platforms up to and including CR-S and ASR.• Experience with use of troubleshooting methodologies and tools such as Wireshark, EXFO tests, and iPerf throughput testing.• Tools include Remedy ticket tracking, Microsoft SharePoint, Cisco NCM, SecureCRT, Granite inventory management, Microsoft Visio, Splunk, Wireshark, and SolarWinds monitoring.

Madison, Wisconsin

• Actively and consistently support all efforts to simplify and enhance the customer experience• Work trouble, CIT and task tickets to resolve outages and customer service affecting issues• Coordinate with internal and external departments to ensure an optimum customer experience whether it is to resolve customer outages or assist in new LBI turn-ups.• Perform network impact assessments to ensure LBI customers are notified of network maintenances• Update existing network documentation as well as add new implementation and changes to network documents• Use a wide variety of software and tools such as Secure CRT, Remedy, Visio, CTC, CTM, SDRP, CINDI, and NCM

Madison, Wisconsin

• Use multiple programs to monitor ten states of network functions and locate outages in a timely and efficient manner• Identify deterioration and faults of components in the system and dispatch field personnel with repairs• Learn and implement new tools and programs used in the department• Work closely with multiple departments to resolve challenging network issues• Answer phones and emails and assist techs in the field• Use a wide variety of software tools such as Remedy, CSG Billing system, Webtop, Drum, Putty, Remote Desktop Connection, MS Outlook and MS Excel