Mainframe Programmer Analyst and Application Support

Doug Nguyen Fairfax, Virginia 703-***-**** *****.*******@*****.***

SUMMARY OF QUALIFICATION

As a Senior Application Support and Software Test & Evaluation with over 20 years of progressive IT experience deploying robust solutions to address mission critical business needs for federal and commercial customers, Mr. Nguyen is adept at several key technologies including Red Hat/Linux, Oracle, VMware and Mainframe Z/OS MVS Technology. Well versed in system development life cycles (SDLC) methodologies, technologies and environments, Mr. Nguyen is a detailed and analytical engineer who is a resulted oriented team player. Mr. Nguyen is looking for full-time positions which can use his knowledge and customer commitment as an Application Support or Software Test & Evaluation in Northern VA area.

EDUCATION

Bachelor of Science, Computer Science, University of Maryland, College Park, MD, 1998

SECURITY CLEARANCE

Current Active Public Trust, Department of Homeland Security (DHS)

In Progress/Completed Public Trust, Custom Border Protection (CBP)

TECHNICAL SKILLS

Platforms/OS: VMWare, Red hat Linux, Sun Solaris, Windows Server 2018 and IBM Mainframe Z/OS MVS

Databases: Oracle12, DB2 UDB, SQL Server, Sybase, VSAM

Business: Defense Security Services, Financial/Mortgage, Homeland Security, Telecommunication, Network Operation Center

Languages: Perl, Shell/Bash, Python, PL/SQL, SAS/SQL, Cobol, CICS, JCL, Assembler (CICS)

Application/Software/Utilities: Splunk, Wed Logic, SOAP, JBOSS, Tomcat, Active Directory, Remedy, SAS, Exceed, MS Office, Rational suite (Requisite Pro, Test Manager, Clear Case, Robot), DOORS, SAS, File-Aid, MVS JCL

PROFESSIONAL EXPERIENCE

AT&T Government Solutions, Senior Application Support Engineer, May 2009 – January 2021

Performed as a senior Application Support Analyst/System Administrator to supporting day to day DHS/AT&T Network Operation Center staff and to ensure the critical mission of supporting the Department of Homeland Security data communication and operations achieve its objectives. In addition, performed as a Programmer Analyst on multiple DHS network monitoring application and at&t financial, billing and procurement applications.

Programmer / Analyst

Developed/modified CICS/COBOL/JCL/DB2/VSAM/ DB2 SQL under z/OS MVS IBM Mainframe technology

Developed/modified Assembler and testing for front end user interface changes

Requirement/Design Review and meetings

Performed analysis, troubleshooting and resolve user problems

Conducted unit test walkthrough

Participated in the user meetings to validate requirements

Created requirements repositories, use cases and traceability

Developed and maintained unit test cases and test scripts

Execution of functional unit/system/ETL test scenarios

Problem reporting/tracking

Worked with project management to assure development and testing is planned into all phases

Document test results and assist with defect management and produce status reports related to the testing process

Review and maintain all project documentation in accordance with procedures

Participated meetings to review Lessons Learned or Project Review and identify potential work process improvement

Application Support Analyst

Performed application support, on-call (24x7) responding to DHS-CBP/AT&T NOC engineers and troubleshooting technical issues when they arise

Worked on assigned tickets on user requests, data analysis, reports generate and other technical assistances

Worked with end users, development team and vendors to obtain knowledges and execute business and technical solutions

Performed as a front-line point receiving issues, responses, resolve or escalate to L3 as needed

Red Hat/Linux Administrator: Monitoring servers, network connection, performance, Oracle Database, application processes and services, security and upgrade patching and resolve server issues

Oracle/Sybase SQL development: Database administration, SQL/data analysis, SQL scripts for create, read, update/remove database rows for data fixes and reporting

Identified (environment or configuration) areas of fault to implement a fix

Monitoring logs, and performing troubleshooting using Linux commands and scripts to drill down and find missing service calls and messages related to portal errors.

Using Remedy ticket system for tracking user issues and reporting

Worked with NOC staff to define business requirements and propose changes to the development team

Worked with development team and assisted in upgrade the enterprise applications and data migration

Perform monitoring Production and Disaster Recovery process, servers, data replication, restarted replication and performed failover/switchover when necessary

Monitoring system performance to ensure applications run smooth and securely

Scripting in Shell/Bash scripts to automate routine tasks, monitoring systems, diagnostics, resolve issues

Creating and maintain written technical procedures and provide technical support to all staff

Environment: SDLC, Splunk, SOAP, Oracle 12c, JBOSS, Tomcat, SQL Developer, Red Hat Linux, Windows Server, Oracle/SQL, SQL Server, J2EE Web Portal application, Remedy Administration/User, Micro Focus (Open View, Network Node Manager), BMC Remedy, SQL Servers, Crystals Report, IBM Mainframe Technology: z/OS MVS, TSO/ISPF, Batch/Online, Cobol, CICS, JCL, VSAM, File Aid, Xpediter, DB2/Spufi/QMF, SQL

U.S.DHS/CBP/ACE (Automated Commercial Environment), July 2007 to April 2009

IBM/Lockheed Martin/PMG Consultant

Application Support Analyst for the DHS/CBP ACE program to support the e-manifest process and cargo trip processes per CBP port officers and Trade Community (Brokers, Importers, Carriers)

Performing on-call (24x7) rotations, responding to bridge calls (24x7), and carrying pager, and laptop for remote response to technical emergencies

Providing Remedy Manager support, assigning tickets, and recording trends and maintaining contact list for the team

Troubleshooting production support issues and making code defect fixes as necessary.

Support the application using backend tools, and analysis to ensure data integrity, performance enhancements, and correction of discrepancies reported from other applications.

Assist Testing team to review, walkthrough the test scenarios, execution, and results

Monitoring logs, and performing troubleshooting using UNIX commands and scripts to drill down and find missing service calls and messages related to portal errors.

Performing analysis of EDI, Middleware messages, Reporting, updates to SAP and UNIX server logs, and troubleshooting other issues raised by ports and carriers.

Analyzing accounts for discrepancies or troubleshooting logins.

Using Remedy ticket system for tracking user issues and reporting

Environment: SDLC, J2EE Web Portal application, SAP Enterprise, Remedy, Sametime, UNIX, Mainframe MVS, VPN clients, Remote access, Dimensions software, Snag It software, DB2 SQL, Remote desktop for message servers, Documentum for Idoc viewing, Outlook, XP Pro, Office 2007, DBVisualizer, Informatica, and SharePoint

Houston Associates Incorporated, December 2004 thru March 2007

Test & Evaluation Lead/Tester

Performed quality assurance function for a project which developed an operational prototype J2EE application for the Defense Security Services of the Department of Defense. This application will perform up/download, retrieve applicant security clearance form(s) from the XJPAS Data Warehousing database.

Conduct peer reviews

Conducted/attended meetings with client and team members for tasks status, issues, and resolutions

Developing test plan document, system test cases/scripts

Execution of test scenarios, database rollback/regression test and evaluation of test results

Validate user requirements and identify testing strategies

Problem reporting and defects tracking

Requirement Analysis and Verification of requirements, traceability, and testability

Test walkthrough and Test Result Reporting

Environment: CMMI, IEEE, Section 508 Compliance, J2EE, SDLC, IBM Rational Testing technologies: Requisite Pro, Clear Case, Clear Quest, Test Manager, Robot

Freddie Mac Corporation, May 2003 thru December 2004

Sr. Analyst/Quality Assurance Engineer - Consultant

Performed requirement analysis, front and back end application quality assurance and support for various projects for the restatement ONTRACK (Close The Books Project) which enhance and automates the auditing and financial applications and providing mortgage financial statistical data to internal user groups.

Conducted peer reviews

Conducted/attended meetings with client and team members for tasks status, issues and resolutions

Developed and maintained test plan, test cases and test scripts

Testing results documentation

Execution of system test scenarios

Verification of requirements, traceability, and testability

Identifying testing strategies

Interface/Integration testing

Overall coordination of testing lifecycle

Problem reporting and defects tracking

Release Coordination

Use cases, requirement, and design analysis

Test walkthrough

Environment: Door, SDLC, PL/SQL, Mainframe MVS, z/OS, DB2/COBOL/CICS, JCL, SAS/SQL, PERL/UNIX/SQL

U.S DHS – US Customs (CBP/Customs and Border Protection), October 1998 thru April 2003

Programmer Analyst/QA Software Analyst in the IBM z/OS MVS technologies to support various application systems within the U.S Customs which included the Treasury Enforcement Communications System (TECS) and Administration System Branch

Developed/modified CICS/COBOL/Assembler modules

Identifying Design/coding and testing strategies

Performed analysis, troubleshooting and resolve user problems

Conducted unit test walkthrough

Participated in the user meetings to validate requirements

Created requirements repositories, use cases and traceability

Developed and maintained test cases and test scripts

Execution of functional unit/system test scenarios

Problem reporting/tracking

Environment: SDLC, TSO/ISPF, SQL, MQ Series, DB2 UDB, DataCom, CICS/Cobol, QMF, Spufi, File_Aid, Xpeditor, z/OS MVS, JCL, VSAM, DynaComm/Elite

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