20 years hands-on experience of Unix systems administration/engineering solutions design in both financial and telecommunication sectors.
Highly-motivated with desire to take on new challenges. Strong sense of accountability and ownership, work ethic and team spirit, adaptability and exceptional personal dynamics. Adept at working effectively unsupervised, results driven and multitasking
Keen on identifying operation process or design flaws to implement risk mitigation measures and drive for stability
Solid troubleshooting and time management skills, details-oriented, methodical and analytical.
Effective cross-team collaboration and coordination skills to complete complex infra or audit compliance projects with partner teams from infra/ app dev / business or vendor sides
Lead Unix/Linux SA, platform SME in multi-platform environments. Low Latency system integration lead and operations support specialist for high profile CS EQ/Prime Services applications.
Specialize in problem deep-dives, issues identification, risk mitigations in by adapting best practices and vendor recommendation to optimize solutions, DevOps automation skills to streamline product delivery cycles.
Very experienced in leading large scale infrastructure projects and events including tech refresh, EoSL migration, quarterly maintenance and DR testing with timely and quality execution and deliveries. Led the effort to successfully migrate the mission critical low latency EQ trading application which impacted over 100 physical servers in total and 900+ virtual IPs movement over one weekend and multiple quarterly maintenance weekends in which entailing on updating over 1000 linux servers with security patching without issues.
Planned and led complex OS upgrade project for over 1000 front office EQ RH Linux physical and virtual servers in north America, led all other regions in completion time and number. Documented instructions for other regional teams to follow and provided troubleshooting guidance.
Planned and led OS/host-based storage migration projects for trading applications without single a single issue over the years in different companies.
Low latency solution design for core EQ cash trading application, case studies, vendor engagement, custom tuning, performance testing and automated global deployment successfully in RH Linux (RH7) release. Developed solution to address a common production issue within systemd Linux running VCS and adapted by vendor SME as a recommended solution.
Automation skills using Python/Ansible/Shell/Perl scripting and various UNIX utility tools
Trading floors and backend servers support for global financial applications and databases.
IT infrastructure planning and strategies, project management and product deliveries cycle management at Citi. Capacity planning/performance evaluation and analysis, forecast management, Asset optimization strategies, TCO tracking and reporting services to senior IT management.
Avid distance runner and marathoner. Completed close to 20 marathons and 50 half marathons
Overview
26
26
years of professional experience
Work History
VP, Lead Platform Engineer
Wells Fargo Home Lending Technology
04.2023 - Current
Lead Linux SME for home lending technology applications and implement best practice in support protocols
Resolve production issues and perform deep dive using various logging and performance monitoring tools such as Splunk and AppDynamics
Ensure operation stability by adapting industrial and companywide standard
Support large scale events and make recommendation to streamline process flow to improve end to end implementation cycle
Cross-team collaboration across both app and infrastructure space to optimize technology solution to meet business objectives
Design/Python script/document for projects and application programs
Review and analyze complex, large-scale technology solutions for tactical and strategic business objectives, enterprise technological environment, and technical challenges that require in-depth evaluation of multiple factors, including intangibles or unprecedented technical factors
Low Latency System Integration Lead and Operations Support Senior Engineer
Credit Suisse High Performance Electronic Trading Infrastructure
10.2021 - 04.2023
America Systems Integration lead and Operations support for Credit Suisse Global High Performance Electronic Trading Infrastructure IBIT and Front Office trading applications hosted in Unix/RedHat Linux environment
Applications range from algorithm trading, dark pool trading, smart order routing and market data
Servers are primarily HP physical machines located at co-lo with close proximity to major stock exchanges and ECN/ETN around the globe
Focus on problem deep-dives of day-to-day production issues, oversee infrastructure product deployment cycle and ensure end-to-end service delivery
Automation using shell/ansible and python scripts
Employ various low latency technologies in both OS and hardware levels for throughput and performance improvements, including cgroup, hardware interrupts management, cpu isolation, RDMA/Kernel bypass for data exchange and packets I/O, NvME storage, etc
Design and implementation of complex infrastructure solution to comply with audit / compliance mandates and mitigation of security vulnerabilities
Keen on process and solutions improvement
Developed new methods of automation for existing processes to meet customer and audit requirements.
Designed, tested and implemented software solutions to meet firm's compliance mandates
Analyzed complex problems, collaborated with IT partners and vendors SMEs to formulated creative solutions.
Lead UNIX System Administrator/EngOps
Credit Suisse Global Technologies Infrastructure Hosting Services
New York City
08.2012 - 10.2021
Level 2/3 Lead Unix/Linux SA/platform SME (Sun Solaris/SuSE Linux/RH Linux) for Global Markets Equities and Prime Services trading applications. Total number of servers combined are over 10,000 physical and virtual machines combined.
Daily responsibilities include BAU request/problem solution research/Issue escalation handling/incident handling/performance tuning
Lead in key EOL remediation projects on tech refresh / security patching / storage migration / compliance projects while being hands-on. Provide operation documentations and serve as problem escalation contact, accountable for providing complex issues solutions during project life cycles
Research and recommend best practices and updated technologies. Implement with staggering approach and proper backup/restore protocols to achieve risk mitigation and process efficiency
Major contributor/advisor to application blueprints update during tech refresh
Automated various operations using shell scripting languages such as Ansible, Python based on requirements.
Project status tracking, collaboration with upstream and downstream partners including vendors to ensure timely and quality deliveries. Work with RedHat SMEs to identify new kernel bug and drive for remediation.
Lead the development effort in engineering design/tuning/POC testing and implementation of low latency solution during tech refresh a mission critical global front office equities order management application. Came up with a solution adapted by Veritas SME to address a racing condition during startup/shutdown of Veritas Cluster product.
TCO reduction initiatives for business by adapting emerging technologies and capacity management. Periodic meetings with client managers to perform inventory and cost review, recommend optimized solutions.
Event SPOC lead for disaster recovery testing/quarterly maintenance activities. Lead is responsible for event data preparation, operation procedure, resources management, coordination with infra / app dev partners and business services continuity teams to ensure scope coverage / data preparation, environment setup are in place, workflow execution on event day to meet RTO and RPO.
VP, Infrastructure Planning and Strategies/Senior UNIX System Administrator
Citigroup Global Markets Technologies
New York City
09.2003 - 07.2012
Managed Citi technology infrastructure environment for Fixed Incomes middle office applications/Global Securitized Markets/Citi-tech Research/Global Banking areas
Responsible for capacity planning and performance evaluations, cost savings initiatives. Developed and executed strategic plans to support the vision of the organization.
Worked with OS/HW vendors/engineering/CTI cross-technology operation teams to provide infrastructure solutions and weekly status reporting to senior IT management and presentation to CTO in global markets on infrastructure work orders
SLA tracking and management throughout implementation cycle
L2 UNIX servers support for Capital Markets Fixed Income Division, including trading floor users and backend servers support
Primary SA for middle office applications/database servers and Foreign Exchange/Municipal/Equities Prime Brokers/Futures applications servers (total 100-125)
Project coordination and management for EMC SAN /CISCO Fabric migration and provided guidelines to other team members
Lead role in DR test coordination/preparation/implementation, Solaris patch/firmware/OS upgrades, SAN stack upgrades, Veritas Volume Manager/File System upgrades
Audit and compliance implementation
Capacity planning / performance testing for new application rollouts
Proactive system monitoring/troubleshooting to ensure services continuity to business
Unix/Perl scripting to automate daily BAU/repetitive administration works
Solaris 8 to Solaris 10 migration project planning and implementation
RedHat Linux servers build and support
Solaris 8 migration for Fixed Income production/DR/UAT/Dev environments
Sun/HP Hardware troubleshooting and maintenance, OS level troubleshooting and tuning
EMC/Hitachi server-based storage migration
Tectia SSH migration
NIS+ domain administration and troubleshooting
Veritas Volume Manager, file systems and VCS installations, configurations, upgrades and troubleshooting.
Senior UNIX Systems Administrator/Infrastructure Engineer
Cablevision Systems Corporation
Hicksville, NY
08.2001 - 08.2003
3rd level Unix servers support for Cablevision’s Optimum Online and Interactive TV services in Broadband internet service center. Member of UNIX infrastructure engineering group
Supported over 300+ SUN servers. Performed Patch Management & engaged vendor on new SUN hardware evaluation and testing.
Maintained Jumpstart and Packaging servers for Solaris 2.7 & 5.8
Administered SUN Enterprise / SUN Fire servers and Nokia IP740 firewall object stations. Configured VRRP and Nokia Horizon Manager. Provided Checkpoint Firewall 4.1 support on Sun E420
Built, maintained and distributed UNIX software packages and application tools
Scripted in PERL(Sybperl), Shell, CGI/HTML. Developed and maintained internal group website
Installed, configured Veritas File System 3.3, Volume Managers 3.1 and Cluster Server 1.3.0&3.5. VCS cluster support for IMS 5.2 mail service/Web portal service/Sitescope monitoring service
EMC Symmetrix 8730 support to provide VCS solution for iplanet email/database servers
Apache 1.3.12 web servers, Iplanet 5.0 & 5.2 Messaging e-mail (POP/SMTP) servers, DNS Bind 9.2.1,FTP, DHCP News (NNTP), Netscape 4.12 LDAP and Oracle database servers support
Supported Cisco Network Registrar 5.5.1 to provide DHCP service for cable modems and digital setup boxes
Unix Engineer - Consultant
Deutsche Bank (USA)
New York City
11.1999 - 06.2001
Member of the UNIX Global Unix Engineering/core infrastructure group, automated system administration and configuration tasks in both IBM AIX and SUN Solaris environments
Developed automated tools for SA groups
Scripted in Perl and Shell to generate periodic reports for UNIX hardware/software resource inventories (1000+ globally consisting of SUN and AIX), in conjunction with in-house auditing service program, to provide configuration, capacity/performance data as well as dependency and security information
Designed/implemented/tested/maintained Solaris 2.6, 5.8 global OS and security builds. Maintained installation and boot servers. Team delivered the first Solaris 8 release in Wall Street
Supported clustered electronic trading system applications
Capacity and performance planning for Netscape Web servers and Bea Web Logic Servers
Hardware evaluations and recommendation for end users /applications developers
Provided documentations on various UNIX engineering services.
UNIX System Integration Consultant
Goldman, Sachs & Co.
New York City
09.1998 - 11.1999
System integration support for Goldman Sachs Asset Management System Equities Division
Scripted in Perl and Shell scripting to support AMS user application testing effort for EMU and Y2K weekends
Application database access and data retrieving activities on SYBASE SQL servers using Sybperl.
UNIX System Support - Consultant
Securities Industry Automation Corporation (SIAC)
Brooklyn, New York
11.1997 - 09.1998
UNIX SA consultant in New York Stock Exchange’s Data Center. Focus mainly on process improvement
Managed and conducted capacity and performance evaluation for BBSS(Broker Booth Support System) applications to optimize data flow and processing on NYSE trading floor
Supported NYSE data center HP UNIX K class servers and EMT (Entitlement Management Tools) applications and the MOTIF-based frontend GUI
Performance and capacity testing on HP-9000 servers
Shell scripting to automate routine SA tasks
Capacity planning and performance testing of BBSS applications.
Education
Master of Science in Electrical Engineering -
SUNY at Stony Brook
Bachelor of Science in Electrical Engineering -
SUNY at Stony Brook
Skills
Efficiency Analysis And Improvement
Systems Analysis And Design
Process Improvement
Cross-Functional Collaboration
Complex Problem-Solving
Analytical Thinking
Design Troubleshooting
Project Planning
Team Leadership
Engineering Process Design
Troubleshooting And Resolution
International Regulatory Compliance
Unix And Linux-Based Tools
Regulatory Compliance Analysis
Linux Kernel
Collaborative Mindset
Work Planning
Technical Documentation
Technical Expertise
Certificates And Trainings
RedHat Satellite 6 Systems Administration
RedHat Pacemaker Systems Administration
RedHat Enterprise Systems Monitoring and Performance Tuning
RedHat Enterprise Linux Diagnostics and Troubleshooting
RedHat Configuration Management with Puppet
RedHat OpenShift Administration
RedHat Advanced Automation with Ansible
RedHat Linux Systems Administration
Agile Project Management
Data Scient Python
Introduction to Containers, Kubernetes and OpenShift
Git Basics and Next Step
ITIL v3 Foundation 2013 certification
NYU SCPS Unix Systems Administration
VMware vSphere ESXi/vCenter Server 5.1 Optimize and Scale
Solaris 10 Systems Administration
SUN Solaris Advanced System Administration
SUN E15K/E12K Server Administration
SUN Cluster 3.0 Administration, SUN NIS+ Administration
IBM AIX IV Performance Management
Veritas File System/Volume Manager and Cluster servers
Hobbies and Interests
Road running
Marathons
Skiing
Accomplishments
Eta Kappa Nu, Electrical Engineering Honor Society
Timeline
VP, Lead Platform Engineer
Wells Fargo Home Lending Technology
04.2023 - Current
Low Latency System Integration Lead and Operations Support Senior Engineer
Credit Suisse High Performance Electronic Trading Infrastructure
10.2021 - 04.2023
Lead UNIX System Administrator/EngOps
Credit Suisse Global Technologies Infrastructure Hosting Services
08.2012 - 10.2021
VP, Infrastructure Planning and Strategies/Senior UNIX System Administrator
Citigroup Global Markets Technologies
09.2003 - 07.2012
Senior UNIX Systems Administrator/Infrastructure Engineer