* Technical lead on relocation of Toronto & Calgary retail card processing network infrastructure to Dallas & Houston* Support worldwide retail credit card processing network infrastructure, including over 90 routers, switches, and firewalls across 6 data centers, serving 28,000 retail locations in 20 countries with over 4M transactions/day volume plus non-card business data* Design, configure, and support mission-critical, diverse, redundant IP networks* Configure and troubleshoot Cisco IOS switches, routers and Cisco ASA firewalls* Plan firewall rule changes for DMZ and coordinate firewall changes with third parties* Plan and implement Cisco router, switch, and firewall upgrades* Coordinate circuit installation and repairs with telecommunication providers* Engineer and install third-party network interconnects and upgrades (VISA, MasterCard, American Express, Hughes, Signalhorn, Orange, etc.)* Troubleshoot circuits including T1/E1, Ethernet, broadband, VSAT, DDS, ISDN, dial (PSTN), X.25* Perform disaster recovery engineering and testing* Manage global IP addressing resources, DNS, and VLANs* Perform security audits of firewall rules and access control lists* Assist with network penetration testing* Perform network data captures and analysis to solve difficult connectivity issues* Work with internal and PCI-DSS auditors to ensure compliance with latest requirements* Work with system analysts to replace end-of-life Tandem, HSM, and server hardware* Develop custom software to automate Cisco IOS device scans for configuration best practices* Perform device cabling, installation, replacement, and repair in the Houston data center* Coordinate device cabling, installation, replacement, and repair in remote data centers* Travel to remote data centers to ensure success of mission-critical upgrades* Support legacy retail UNIX applications (Python, C, Perl)* Provide L2 on-call support

* Part of a global team supporting ~300 Windows and Linux Servers in data centers worldwide* Assist knowledge transfer during company re-organization, which transitioned Retail Server Operations into ExxonMobil Global Base Operations* Train operations and application support staff on custom retail server applications* Transition ownership of MOVEit application code, documentation, and maintenance to application developers in Brazil for post-project support* Perform end-of-life server migrations to new hardware* Migrate physical servers to VMware clusters* Perform end-of-life operating system migrations* Perform online SAN migrations to expand server storage space without downtime* Support fault-tolerant Windows clusters including SQL Server* Perform security audits, scans, and access reviews* Design and implement application security standards* Troubleshoot and repair Dell/HP server hardware components and software* Develop cybersecurity attack contingency plans for retail organization and represent the retail organization in corporate cybersecurity workshops* Coordinate with application teams and other groups to create and test disaster recovery plans* Provide L2 on-call support

* Technical lead and developer for back-office server software modernization project for retail store payroll submission and dry stock management system* Rescue half-finished project from former developer and complete it on schedule* Code mission-critical, high-availability software in C, VBScript on Windows Server Cluster* Complete client application code in Visual Basic and C on Windows* Replace legacy SCO UNIX application with MOVEit Central and MOVEit DMZ on Windows* Extend MOVEit Central with VBScript and C code to replicate custom functionality in legacy UNIX system* Maintain a fork of PuTTY application code with custom enhancements* Enhance application security with certificate-based authentication and encrypted file transfer* Electronically distribute updated client software to 1,300 retail stores in US/Canada* Provide training and documentation to application support group and help desks in Canada and Guatemala* Provide L2 support during pilot and transition period* Assist retail network operations team with transition from end-of-life 3COM Total Control modem banks to Cisco 3845 routers with PVDM modules

* Design and code mission-critical software projects in C and Perl on Linux and SCO UNIX* Fork open-source Ascend RADIUS software to integrate support for 3DES authentication tokens, eliminating unreliable third-party software* Code second-generation authentication system using SHA-1 iButtons* System administration on Linux, AIX & SCO UNIX systems* Perform security scans on Linux, AIX & SCO UNIX systems and network* Support custom applications for US retail store payroll submissions* Support custom applications for Canada retail store dry stock management* Support Total Control modem banks for retail store network connectivity* Develop second-generation application to store and analyze log data from servers and other devices* Develop tools to track and report reviews of suspicious log activity for compliance purposes* Develop second-generation POS diagnostic database on Linux and Oracle

* Embedded Systems Engineering & Development Project* Sole software developer on project to bring a first-of-its-kind, realtime flow control system for natural gas field compressors from R&D to a field test* Meet tight project deadlines and budgetary requirements* Analyze R&D from Southwest Research Institute (SWRI) and meet with SWRI and Pondhop engineers to determine hardware and software requirements* Evaluate and select embedded PC platform for project* Evaluate and select RTOS for project (Xenomai with Debian Linux)* Develop realtime hardware control software in C using Xenomai & Linux APIs and hardware interface via direct GPIO access* Implement plug-and-play field upgrade and log file extraction scripts* Create field hardware simulator for testing during software development* Successfully complete validation testing with prototype hardware

* Design and code mission-critical software projects in C and Perl on AIX, Linux, and DOS* Support retail credit card processing network infrastructure and front-end processors* Develop a cost-saving, high-performance messaging system that communicates between help desk staff and point-of-sale (POS) terminal operators. Extended the system to business partners who could automatically deliver credit card charge-back and fuel delivery notifications to retailers* Develop Microsoft SQL server application to collect & analyze real-time POS diagnostic data for discovery and resolution of network issues* Develop an interface between help desk applications and network front-end processors; simplify common maintenance tasks* Create a secured server to store and analyze log information from all production and development servers and network devices* Develop a system to stress test and benchmark network front-end processors with simulated point-of-sale X.25 network activity* Create a POS gateway between RS/6000 and AS/400 environments* Develop prototype embedded system to bridge RS-232 retail POS devices to IP networks* Perform detailed security analysis and remediation of UNIX/Linux systems* Evaluate network security* Design and implement firewalls and other network and application defenses* Implement a fault-tolerant, two-factor authorization system for operations remote access* Perform system administration and second-level support of global network UNIX servers* Perform disaster recovery testing and maintain company equipment at Sungard DR facility* Perform AIX & Linux system administration* Create software documentation for end-users and operations support* Provide 24x7 second-level network and application support for retail store help desk

* Contribute new product announcements, reviews, and news items* Perform hands-on technical evaluations of hardware, software, and connectivity products for news staff

* Develop software in C, C++, x86 assembly* Optimize C, C++ programs used to create high-resolution animated courtroom presentations* Perform system administration for UNIX and Novell NetWare* Design and assemble UNIX, DOS, and OS/2 workstations and servers* Evaluate hardware, software products and made purchasing decisions* Perform troubleshooting and repair of all systems