1. Robert Hensel
Warwick, NY 10990 compumain@gmail.com (v111416)
An accomplished z/OS Senior Systems Programmer with extensive experience in many aspects of Enterprise Systems
support, including software project and product planning, customization, maintenance, problem and change
management, performance and tuning, measurements, software utilities, WLM performance controls, HCD Gens,
system image creations/merges.
Summary of Qualifications
 30 years experience in large enterprise systems support environment.
 25+ years’ experience MVS ‣ z/OS systems programming support for large JES2 and JES3 complexes.
 Expert knowledge of z/OS and Unix System Services, PC architecture, Windows
 Project management for system software upgrades including customer presentations and communications, technical
and team planning, project documentation and technical leadership
 Extensive work in new z/OS software product installations and product replacement migrations
 A department problem determination lead, with long experience in working with vendors to capture issue data, push to
resolve issues, and in designing utilities to provide better diagnostic data. Performed pre-project and periodic reviews
for potential problems (preventative maintenance planning).
 Capacity Planning and Performance Management role for z/OS systems, including upgrade planning, special project
capacity needs, peak load Capacity-On-Demand (COD), and software cost management.
 Ad-hoc and strategic capacity planning/reporting.
Professional Experience
11/2015 – Present Sabbatical – Personal Financial/Investment planning, local technical projects in Warwick NY
06/2001 – 11/2015 TIAA-CREF New York, NY
z/OS Senior System Programmer: Support, planning and enhancement of 9 z/OS LPARs at 2 sites including:
• Z13 CPU install team player, including installing compatibility prereqs for program products, configuring memory,
logical CPU, LPAR weighting, project communications and cutover support, verification of new capacity and new
capacity monitoring post upgrade.
• Completed “zPCR” (IBM's Processor Capacity Reference) studies for z13 and z196 upgrade planning.
• Initiated test use of “zBNA” (Batch Network Analyzer) as an adjunct tool for performance / capacity investigation.
• Completed z196 End-of-Marketing / Future State presentation. This work was sent up to “C” level executives.
• Managed monthly SCRT (Sub Cap Reporting Tool) reporting and worked with IBM on resolving / preventing
discrepancies and tracking / limiting high CPU consumers.
• Managed Quarter, Year-end, and emergency mainframe capacity needs via On/Off Capacity on Demand (CoD)
management, and/or problem determination and ad-hoc job or service class capping, as required.
• New install add of IBM Tivoli OMEGAMON XE for DB2 ... monitor to the Omegamon suite, in support of the DB2
initiative.

2. • Implemented excel pivot chart views of z/OS system capacity and workloads for a 12 year span, used in peak need
planning and organic growth projections.
• Developed / rolled out automated timed LPAR weight rebalancing to move CPU resources to service high business
importance CPU requirements while containing SW/HW costs.
• Assumed ongoing Performance and Capacity support for z/OS systems (50%+ of time) to backfill for staff reductions
in the Performance and Capacity workgroup.
• Ongoing system tuning: paging design, IEAOPTxx and other PARMLIB settings, system weights and memory
assignments, Logical CPU settings,
• Worked with vendor management team to negotiate reduced license pricing on a mainframe database software set.
Developed special usage reports to meet vendors’ requirements to take advantage of sub-capacity pricing.
o Developed / implemented WLM resource group capping for all workload using this database product set, to enforce
contract-compliant limited of use of this product. Tracked spurious high users of product and assisted in getting them
back in profiled usage levels.
o Provided quarterly reporting to Database vendor to meet sub-cap usage restrictions
• Completed revised Mainframe Technology road map to inform major batch application planning teams of mainframe
hardware strategy and directions.
• Completed JES2 spool optimizations on all systems. Released 3390-27 were returned to Storage Administration, while
simultaneously increasing spool capacity for individual LPARS by 35% or more.
• Completed review of IBM Tivoli System Automation, as a replacement for BMC automation products (with
Automation team)
• Led enablement of Hiperdispatch, and verified benefits in the system performance space.
• Completed re-evaluation of Parallel Sysplex and alternative options for support of new business software suite,
including costs/benefits of coupling facility with DFSMS/Transactional VSAM/Record Level Sharing, as opposed to
HWCS SYSB-II, for record level shares between CICS and BATCH (with CICS Transactional Support team).
• Prepared z/OS Configuration Options presentation and held focus groups to reevaluate the advantages of
implementing true Parallel Sysplex using coupling facility.
• Initiated, completed conversion from HFS to ZFS Unix System Services file systems
• Completed installation of SAS ITRM and specialized SAS 9.x installation in support of SAS ITRM.
• Ran project to reduce “below the line” memory map to allow ongoing growth in system reserved <16MB space. This
required monitoring all address spaces for region settings and actual low storage needs.
• z/OS 1.9 Serverpac install, customization, project technical lead. Responsible for detailed time and action plans,
communications, cutover support
• z/OS 1.7 Serverpac install, customization, project technical lead. Responsible for detailed time and action plans,
communications, cutover support
• Supported CA Scheduler CA7 migration, including design, installation, documentation, and security specifications.
• Initiated / led project to rework region standards, to address ongoing “low” storage shortage conditions.
• Supported 2 data center relocations, including setup of new z/OS images mirroring the existing LPARs
• Provided 2084 and 2064 IODFs to match device and CNT transitional / final production states task plan and execution
support of relocation, including JES spool offload/reload, intermediate host network connectivity, etc
• Completed reconfiguration of Global Resource Serialization (GRS) implementations and logical CPU definitions to
reduce contention issues and reduction of the "short engine" effect, making system performance more responsive.
• Completed REXX program set using CA Sysview interfaces, to capture and archive detailed system data. This has
become a primary tool for rapid problem determination.
• Project and technical lead for conversion to 64-bit mode (@OS.390 2.10).
• Install and configure a new software product, Hitachi Business Continuity Manager (replacement for HXRC, req’d for
DDRC remote site support and supported “High Availability” initiatives.

3. • Installed, maintained several CA products (Scheduler, PDSMAN, MICS, JCLCHECK, CA-GTS…)
• Replaced CA MICS with a multi-platform install of SAS / SAS ITRM / MXG to support sub-capacity usage reporting
of a non-IBM database product.
• Built a functional test environment for CA MICS to support ongoing upgrades & maintenance of this product (CA
MICS was later replaced with SAS & SAS IT Resource Management.
• Upgraded/Configured CA MICS Test and Production environments until mid-2013.
• Converted CA MICS Test and Production environments to use SAS 9.1.3 code.
• Upgraded COMPUSET product (used as a batch document preprocessor/formatter to V9.4 for z/OS 1.9 compatibility.
Sunset COMPUSET products 6/2014.
• Replaced existing OMEGAMON MVS products with current IBM Tivoli Omegamon components on all z/OS
systems. Continued upgrades of Omegamon components thru 11/2015.
• Replace existing OMEGAVIEW with new product replacement IBM Tivoli Omegamon DE on all z/OS systems and
continued upgrades of Omegaview components. Started migration to replacement product Tivoli Omegamon
Enhanced 3270 user interface. Installed, configured Tivoli OMEGAMON Manager (TOM).
• Provide planning and IOGEN and configuration support for main datacenter mainframe hardware upgrades, including
but not limited to DDRC project cross-site requirements
• Provided ongoing evaluation of supported program products - enabling new product features and enhancements driven
by upgrades, and sunset / removal of obsoleted products.
• Provided support for VM relocation and ongoing I/O connectivity configuration support as it relates to the primary
mainframe.
• Provided ongoing improvements for problem management, including but not limited to SA Dump to DASD, Dynamic
Dump enablement, REXX code to capture system state detail history, region monitoring.
09/1998 – 06/2001 KMR Information Systems New York, NY
OS/390 Systems Consultant at Salomon Smith Barney, NYC
• OS/390 environmental improvements (catalog reorganizations, resource cleanup, review, improve failure prone
procedures, project management, productivity metrics doc)
• IBM and OEM software updates and maintenance of 16 OS/390 LPARS with large JES2 sysplex.
• Y2k preparedness planning and support
• z/OS 1.1 installation, test, project management on test LPARS.
• Part of 2 person team for ACF2 to RACF Security Server conversions.
• Part of 3 person team for XA MIM to GRS conversion.
• OS/390 2.8 to 2.10 upgrades. Project technical lead support, communications, OEM product upgrades for 2.10
compatibility.
07/1998 – 08/2001 Quest Diagnostics Teterboro, NJ
Lead OS/390 System Programmer:
• Upgraded Candle software products to current levels
• IBM software install, problem management
• Maintained IOGENs

4. 03/1985 – 07/1998 IBM Sterling Forest, NY
Advanced from Associate to I/T Systems Management Integrator (aka System Programmer)
• MVS lead of 3 person team that evaluate system capacity needs and initiated reconfigurations, equipment sunsets,
eliminating $2.6M in operating costs.
• MVS upgrades and maintenance, system image builds, Assembler and CLIST utility coding.
• 6 Sigma initiative reviews of mainframe related support groups.
• Assumed support for OS/390 based TCP/IP instances, configuration, 3172 connectivity support
03/1979 – 03/1985 IBM West Orange, NJ
Large Systems Customer Engineer (CE) in Northern NJ / NYC / Upstate NY branches
• Provided on-site support of mainframes and I/O assets of IBM customers in several key accounts.
• Aided marketing efforts by enhancing customer satisfaction in marginally satisfied accounts. Received Marketing
Support Award.
Education
Includes but not limited to:
• Regular attendee of SHARE conferences
• Regular attendee of Z Technical University conferences
• McData Large Fabric Design and Management (SAN)
• Workload Manager Workshops
• OS/390 Expos
• Parallel Sysplex Operation and Recovery
• JES2 V5 Implementations Workshop
• Exploiting MVS/ESA for Performance
• SAA/REXX Procedural Language
• MVS Diagnostic Data and Procedures
• Assembler Coding
• IBM Programmers Technical Series (PL/I, JCL, UTILS, BAL)
- Higher Education –
Extensive Coursework (Math, Business, Engineering, Accounting and Business Marketing)
• Ramapo College (NJ)
• Fairleigh Dickenson University (Rutherford)
• William Paterson College
• University of Maryland

5. Languages / Programs / Functions
Including but not limited to: z/OS 1.1 through 1.13, OS/390, MVS/ESA, System Utilities, SMP/E, ServerPac, REXX, CLIST,
HCD, IOCP, HMC, WLM, JCL, TCPIP, JES2, JES3, VTAM, ISPF, VSAM, TSO, Omegamons, CA SYSVIEW, PDSMAN,
JCLCHECK, RMF/SMF, SAS IT Resource Manager (SAS ITRM), MXG, RACF, df/SMS, WINDOWS, MS/OFFICE,
LibreOFFICE, AVIMARK Server and Client installs.

6. Languages / Programs / Functions
Including but not limited to: z/OS 1.1 through 1.13, OS/390, MVS/ESA, System Utilities, SMP/E, ServerPac, REXX, CLIST,
HCD, IOCP, HMC, WLM, JCL, TCPIP, JES2, JES3, VTAM, ISPF, VSAM, TSO, Omegamons, CA SYSVIEW, PDSMAN,
JCLCHECK, RMF/SMF, SAS IT Resource Manager (SAS ITRM), MXG, RACF, df/SMS, WINDOWS, MS/OFFICE,
LibreOFFICE, AVIMARK Server and Client installs.