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Meet the Enterprise Systems Faculty:


Marilyn Zeppetelli
Professional Lecturer, Director of Large Systems Education, Marist College

Marilyn Zeppetelli is a Professional Lecturer and Technical Director of Large Systems Education.  Marilyn has over 25 years of experience working with IBM mainframes, both as a software engineer and a systems programmer, in various roles such as customer technical support, technical education for beta programs, and mainframe systems administration.  She is also well versed in a broad spectrum of old and new programming languages from Assembler, Basic and SQL to Java, Perl and Python. 

Marilyn holds a BS in Mathematics from Marymount College, an MS in Computer Science/Information Systems from Marist College, and an MS in Biotechnology/Bioinformatics from Johns Hopkins University.  She is an avid Crossfitter, plays the French Horn in a local community band, and hikes as often as she can.  Marilyn and her husband Joe have two sons; their older son is a member of the Marist Class of 2019, and the younger one is in high school. 

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Bob Abrams
RAS and Problem Determination, IBM

Bob AbramsBob Abrams is a Senior Technical Staff Member (STSM) in z/OS Design & Development at IBM in Poughkeepsie, NY. Celebrating 30 years at IBM, Bob focuses on issues related to z/OS Reliability, Availability and Serviceability (RAS) issues, and Problem Determination simplification. Bob spent his first 10 years at IBM in the z/OS Consoles area, designing and developing a number of exciting operational improvements. After spending four years as a JES2 development manager, Bob focused on improving the Problem Management and RAS areas, analyzing and defining new functions to address customer requirements throughout the z/OS product. He is currently working on ways to simplify problem determination and problem data management for z/OS installations.

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Shirley Brost
DB2 for z/OS, IBM

Shirley BrostShirley Brost is a Senior Technical Instructor for IBM's Information Management / Software Group, specializing in DB2 System and Database Administration. Shirley earned Bachelor of Science degrees in Computer Science and Mathematics from the University of South Dakota, and a Master of Science degree in Technology Management from the South Dakota School of Mines and Technology. She has over 30 years of educational experience, and is an IBM Certified Learning Professional. Shirley is a frequent speaker at industry conferences, and has authored materials for several IBM customer training courses. Shirley has taught the online DB2 Fundamentals course for Marist College since 2009.

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Robert M. Cannistra
Sr. Professional Lecturer for the School of Computer Science and Mathematics, Marist College

Robert CannistraRobert M. Cannistra is a Sr. Professional Lecturer for the School of Computer Science and Mathematics at Marist College. Mr. Cannistra holds the responsibilities of Information Technology discipline chair, School of Computer Science and Mathematics lab coordinator, and project manager for the Center for Collaborative and On-Demand Computing. Mr. Cannistra also provides consulting services for network infrastructure, design and security needs.

Mr. Cannistra has held the positions of Northeast Regional Manager, Technical Services Manager and Senior Consultant for a Cisco Gold Partner. His time there was spent designing, configuring, and implementing highly accessible data networks for various enterprise, service provider and Internet companies across the world, some of those clients include Quaker Oats, Milwaukee Electric Tool, AC Nielsen, Cogent Communications and, among numerous others.. Upon the completion of each client implementation he would develop and instruct customized training courses to help the client manage the newly designed networks. Mr. Cannistra has taught as an adjunct faculty member at Rensselaer Polytechnic Institute (RPI) for their Computer Science, Engineering, and Information Technology curricula and as an adjunct technical instructor for a technical institute in Poughkeepsie, NY. He has also held the positions of Senior Network Engineer for, Inc., Internet and Intranet Infrastructure Webmaster at AT&T Solutions and Systems Engineer at Kodak Imaging Services.

Mr. Cannistra holds a Master of Science degree in Computer Science/Information Systems, a Bachelor of Science degree in Computer Science, an Associate of Science in Liberal Arts and Science and several industry technical certifications including CCAI-CCNA, CCAI-Security, CCNA, CCNP, CCDA, CCDP, CCSP, CSE, MCSE, and CLP.

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Mike Cirulli
z/OS Networking, IBM

Mike CirulliB.S. Computer Science Union College

M.S Rensselaer Polytechnic Institute

28 Years at IBM

13 Years Mainframe Manufacturing Test Process Development

7 Years in z/OS Level 2 Defect support, primarily with the z/OS sysplex Components. Working with IBM customers to resolve system outages both setup/user errors as well as identifying problems in z/OS operating system code.

5 Years in z/OS Software Test working with Network and Connectivity Components. Testing Open System Adapter firmware and it's interaction with zSeries operating systems and various network components. Creating unique network infrastructures to test the functions of both the firmware and operating systems. Identifying problems in the network and resolving them to setup/network/firmware issues.

3 Years in zSeries Networking Firmware Development. Working with the Open Systems Adapter firmware developing new functions as well as resolving problems reported by IBM customers as well as the various IBM Test Sites.

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Angelo Corridori
Introduction to z/OS and Major Subsystems, z/OS Advanced Topics, z/OS Emerging Technologies, Marist College

Angelo CorridoriMr. Corridori is currently a faculty member and Director of Large Systems Education. In this role, Mr. Corridori is responsible for teaching and developing the Large Systems education curriculum which offers online classes through the Institute for Data Center Professionals (IDCP). Mr. Corridori works closely with the IBM Academic Initiative and an Advisory Board with broad industry representation that helps develop new classes and shape the content of the classes to meet the skill needs of potential employers. He is also responsible for increasing student enrollments and recruiting qualified faculty to meet the growing needs of the program.

His prior experience includes a thirty three year career at IBM Corporation where he held technical, staff and management positions in the IBM Poughkeepsie software and hardware product development laboratory. His most recent position included responsibility for the System z clustering (Parallel Sysplex) and disaster recovery (GDPS) technologies as the technology development team leader. Prior to joining IBM, Mr. Corridori worked at Pratt and Whitney Aircraft where he was responsible for military and commercial aircraft mission, airframe, and engine analysis.

 Mr. Corridori also has over 25 years of teaching computer related subjects at vocational schools and colleges. He is a recent recipient of an IBM faculty award aimed at developing large systems technology case studies.

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Greg Daynes
z/OS Installation, IBM

Greg DaynesGreg Daynes graduated from SUNY Binghamton with a Bachelor of Science in Mathematics with a Specialization in Computer Science (they didn't have a CS degree in 1978). He worked at AT&T from 1978 until 1988, first as an IMS systems programmer and then the lead MVS system programmer. Since Feb 1988, Greg has worked at IBM focusing on software packaging, installation, deployment, and maintenance best practices. His current title at IBM is Senior Technical Staff Member responsible for z/OS Installation Deployment Architecture.



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 Casimer DeCusatis 
 Assistant Professor - Introduction to Cybersecurity

Cas Head ShotCasimer DeCusatis, Ph.D. is an Assistant Professor in the School of Computer Science and Mathematics, Marist College, Poughkeepsie, NY. His interests include cybersecurity (as principle investigator for the NSF SecureCloud program), software-defined data centers, and optical networking. He is an IBM Distinguished Engineer Emeritus, a Cisco Distinguished Speaker, a Fellow of the IEEE, OSA, and SPIE, an IBM Master Inventor with over 150 patents, and recipient of several industry awards, including the IEEE Kiyo Tomiyasu Award, the Sigma Xi Walston Chubb Innovation Award, the EDN Innovator of the Year Award, the Mensa Creative Achievement Award, the Penn State Outstanding Scholar Alumnus / Mark Luchinsky Memorial Lecture, and the IEEE/HKN Outstanding Young Electrical Engineer Award (including a citation from the President of the United States and an American flag flown in his honor over the U.S. Capitol. He is co-author of over 200 technical papers, book chapters, and encyclopedia articles, and editor of the Handbook of Fiber Optic Data Communication (now in its 4rd edition. Dr. DeCusatis received the M.S. and Ph.D. degrees from Rensselaer Polytechnic Institute (Troy, N.Y.) in 1988 and 1990, respectively, and the B.S. degree magna cum laude in the Engineering Science Honors Program from the Pennsylvania State University (University Park, PA) in 1986.

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Peter Enrico
Adjunct Instructor - z/OS Performance Fundamentals, Marist College

Peter EnricoPeter Enrico has strong and diverse experience with the IBM zArchitecture platform, and a solid background in z/OS, Workload Manager, J2EE, WebSphere Application Server, Web Services, e-business applications, application architecture, Parallel Sysplex, and z/OS UNIX System Services. He also has a good deal experience with a variety of UNIX platforms, ERP applications, and distributed application architecture.

Peter has a well-rounded computing knowledge base, but he specializes in computer performance analysis, measurement, tuning, and capacity planning of large enterprise computing systems, subsystems, and e-business applications. Peter's abilities extend beyond just performance since he is considered a strong project manager. Peter has a reputation as a rounded technical project leader with the ability to get large complex projects under control. Last, but certainly not least, Peter is a highly qualified and effective seminar instructor and conference lecturer. He is known as someone that can explain complex computing concepts to wide audiences, including managers and executive, in an effective and easily understandable manner.

Peter started his career working for IBM as an MVS systems programmer and field tester of new MVS releases. From there, he worked for 5 years as a designer and developer on IBM's Resource Measurement Facility (RMF) product where his responsibilities included architecture of new hardware and software performance measurements, performance data collection design, enhancements to SMF records with the latest measurements, and updates to performance data reporting. Eventually Peter left RMF to become a member of the MVS Workload Manager Algorithms design and development team for the initial WLM release. After this assignment, he worked as the lead performance analyst responsible for the overall performance of MVS/ESA Version 5.2, working with MVS system designers and developers to improve performance of this MVS release.

Peter returned to the WLM design and development team to work on development of WLM management of enclave and application environment workloads. Later he also was on the team responsible for porting SAP R/3 to the S/390 platform and for SAP R/3 performance benchmarking. Peter also did some SAP R/3 system development and porting work. His last assignment while working for IBM was with the team responsible for porting and benchmarking ERB product BaaN MVS UNIX.

In 1997, Peter joined Watson and Walker, Inc. working under the direction of Cheryl Watson. Watson and Walker, Inc. is a well known and respected consulting company, which publishes the popular "Cheryl Watson's Tuning Letter". During his time with Watson and Walker, Inc. he worked with Cheryl developing her advanced performance seminar materials. Peter was also the managing editor and contributing author to the Cheryl Watson's Tuning Letter.

Peter also has extensive experience porting UNIX applications (client-server) to the IBM zSeries platform. Peter has led several major UNIX application and database porting efforts to the IBM UNIX System Services platform. He has also led a number of performance design, evaluation and benchmarking efforts for applications UNIX applications on the z/OS platform.

Since 1999 Peter Enrico has worked as an independent systems and software performance consultant, seminar instructor, benchmarker, and software project manager and designer. His zSeries customers include many large and small corporations in nearly every corporate sector and around the world. Due to his diverse and unique set of skills, on a regular basis many customers, vendors, and even IBM, tap Peter's performance knowledge of z/OS, zArchitecture, Workload Manager, WebSphere on z/OS, e-business, Parallel Sysplex, and UNIX Systems Services, and general workload analysis.

Peter offers several highly regarded educational performance offerings and is considered a highly qualified and knowledgeable instructor. All of Peter's seminars get rave reviews from students.

Peter is a regular speaker at SHARE, IBM's zSeries Expo, both national and regional Computer Measurement Groups (CMGs), and variety of international conferences. Peter has published a variety of presentations and papers on a wide variety of zSeries performance related topics.

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Gary Fisher
z/OS Networking, IBM / Marist College

Gary Fisher

Gary Fisher has been a programmer for IBM for 35 years. Gary has worked at several US sites, as well as France and Ireland, on a wide variety of software and hardware development projects focused on managing computer inter-connections for network and data transfer. Gary has received several awards and co-authored several patents and books, mostly for work in multi-system processes and automation for connectivity management.  Gary is a doctoral candidate at Pace University, received a MS in Computer Science from Rensselaer Polytechnic Institute and a BS from Buffalo State College, and is an adjunct professor at Marist College where he teaches Mainframe Networking and Data Communications.  Gary is currently a Mainframe Connectivity consultant based from Poughkeepsie, NY, USA helping IBM customers manage interconnections between large and diverse computer installations. 

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Matthew Johnson
Professional Lecturer, Marist College

Matthew JohnsonSchool of Computer Science and Mathematics, Marist College, Poughkeepsie, New York, AIX on Power Certificate program.

Mr. Johnson is a Professional Lecturer in Information Technology with expertise in Unix/Linux operating systems, web programming and computer graphics. Prior to joining Marist College in a full time capacity, Mr. Johnson taught Computer Science and Web Development classes as an adjunct at both Marist College and the State University of New York at New Paltz. Mr. Johnson is a new contributor to the Institute for Data Center Professionals and looks forward to sharing his expertise and providing students with exposure to this important technology.

In addition to his experience in academia, Mr. Johnson worked for more than five years as a software engineer and architect for Informeta, LLC, developing artificially intelligent data quality analysis tools.

Mr. Johnson holds a Masters Degree in Computer Science from the State University of New York and resides in the Hudson Valley with his wife and two children.

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Craig Johnston
z/OS Security, IBM

Craig JohnstonCraig is currently working in IBM's STG Lab Services group. his main tasks are to assist clients with implementation of zSeries security solutions. Specific focus has been on encryption key management and security system assessments. Provide education to clients on all aspects of enterprise security. A large part of his duties include educating the client teams on security related topics, and bringing ‘best practices’ to client processes.

For over a decade, Craig was responsible for the design and implementation of the test approach definitions for security related elements of the z/OS operating system. These strategies included the interaction between security elements and other system components, the base OS, and other platforms such as Linux and Windows. In the past he has performed code development, functional and system level testing, and project management duties.

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Eitel Lauria
Director of the Master of Science in Information Systems, Co-Director of the Master of Science in Technology Management, Marist College

Eitel LauriaEitel J.M. Lauría is an Associate Professor of Information Systems at Marist College, Poughkeepsie, NY. Prof. Lauría serves as director of the Master of Science in Information Systems, co-director of the Master of Science in Technology Management and project manager at the Center for Collaborative and On-Demand Computing.

Dr. Lauría holds a PhD in Information Science from University at Albany, SUNY. Professor Lauría is also an Electrical Engineer from University of Buenos Aires, Argentina and holds a joint MBA from Universidad del Salvador (Argentina) and Universidad de Deusto (Spain).

Before joining Marist College, Dr. Lauría held faculty positions at University of Buenos Aires, Universidad del Salvador and University at Albany. He has also served as an information systems and information technology consultant to Microsoft, IBM, Exxon, and other global corporations, advising on such topics as decision support systems, business intelligence, data management and distributed applications. Dr. Lauria is co-author of a book on information quality published by MIT/IQ. His research in Bayesian networks and statistical machine learning has been published in Decision Support Systems, the European Journal of Operational Research, and other scholarly publications.

Dr. Lauría is one of the two recipients of the 2007-2008 Faculty Recognition Award for his scholarly work. In 2007, a paper on data quality written by Dr. Lauría in collaboration with Dr. Giri Tayi (University at Albany) won the best research category of the Premio Sadosky. The Premio Sadosky is the most important Argentine IT award, sponsored by CESSI (, the largest IT vendor consortium in Argentina, that includes companies such as IBM, Oracle, Accenture, EDS, Microsoft, Google, SAP, Siemens among its members.

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Philip Marsh

Philip MarshAsst. Professor of Computer Information Systems Dutchess Community College

Education: BS degree in Biology from Cornell University, Ithaca, NY .

MS degree in Computer Science from Marist College, Poughkeepsie, NY

MS degree in Education Technology from Capella University, Minneapolis, MN

Certificate from IBM Corporation in Systems Programming

Employment: IBM Corporation 1967-1992 (Retired in 1992) Software Developer, IBM instructor of Software Development, Manager of Programming

Education: Dutchess Community College (1992-Present), Assistant Professor of Computer Information System, Professor of Software Development (VB, C++, S/390 Assembler Language), Operating Systems, Systems Analysis.

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Ben Rogers
z/OS Security

Ben RogersBen has extensive experience testing z/OS security components including LDAP, RACF, PKI, EIM, Kerberos, SSL and ICSF. He is a published author with topics ranging from identity administration and web services security for z/OS, Kerberos SPNEGO implementations, and OpenPGP key management and secure data exchange between business partners. He has architected and implemented a common z/OS security configuration for multiple sysplexes in the z/OS test lab so that security testing can happen anywhere and anytime. He has designed and implemented several Java based applications including a J2EE based OpenPGP key server designed to facilitate secure distribution of OpenPGP keys and a threaded Java test tool. Currently Ben is an IT Specialist and the System z Security team lead for the Lab Services organization where he designs and implements security solutions ranging from ICSF and tape encryption cryptography to Kerberos, RACF, PKI and LDAP. Ben is also the CTO for a startup Public Relations services company.

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Helen Tsang
z/OS Installation and Migration, IBM

Helen TsangBS in Computer Science from CUNY, 1981

Worked at Texaco, Inc. from 1981 until 1984 as an Application Programmer and a Database Administrator.

Worked at IBM since 1984 on z/OS Installation and Migration issues; CBPDO and ServerPac Installation; MVS and z/OS Product Packaging.


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Jon Veilleux
Introduction to z/OS and Major Subsystems, Aetna, Inc.

Jon VeilleuxJon Veilleux is a Senior Systems Programmer who has been a System Programmer at Aetna Inc. for 28 years. He has installed, supported, and debugged the MVS, OS390, MVS/XA, and z/OS operating systems and many of the subsystems (JES2, MQ, CICS, WebSphere). He is experienced in several computer languages including Assembler, REXX, CLIST, JCL, and Shell scripting. His recent duties include developing and presenting operating system classes, and mentoring junior staff members.

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Marna Walle
z/OS Installation, IBM

Marna WalleMarna Walle is a Senior Technical Staff Member in the Systems and Technology Group at IBM Poughkeepsie, where she works within the z/OS Development organization. Her current responsibilities include z/OS release migration and new installation technologies. Marna is a frequent speaker at customer conferences on z/OS installation and migration topics, and is the technical owner of the z/OS migration documentation.


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Mike Buzzetti
Cloud Infrastructure and Services, New York Times

Mike BuzzettiMike Buzzetti is an Solutions Architect at The New York Times. Currently he is helping build a globally dispersed, low latency, cloud based messaging system for online media. Before joining The New York Times, Mike was an IT Architect at the IBM Design Center with worldwide focus on client’s cloud based enterprise infrastructures. He began his IBM career in 2003 at the Test and Integration Center for Linux. In 2006, Mike joined the Design Center, where he helps clients design optimized IT Infrastructures. He designed a number of infrastructures that featured Linux on the mainframe and has had extensive experience helping clients use cloud and virtualization in complex environments. Mike has been a leader in implementing cloud computing with a number of publication on the subject. Mike has authored a book on Java 2 Platform, Enterprise Edition (J2EE) on z/OS® security,as well as a number of whitepapers. He is a regular presenter at user conferences and a number of IBM-sponsored venues. Prior to joining IBM, Mike was a System Administrator and Programmer for the Chemung County (NY) Department of Social Services from 1997 until 2001.

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David Woolbright
Basic and Advanced Assembler, TSYS School of Computer Science

David Woolbright PicDavid E. Woolbright spent his academic career at Columbus State University in Columbus, Georgia, as a Professor of Computer Science. His research interests include combinatorial mathematics and programming language pedagogy. He has taught assembler language as a corporate trainer for several Fortune 500 companies, and at the university level for over thirty years. After completing degrees at Davidson College, Emory University, and Auburn University, he studied Computer Science at Clemson University. He maintains an assembler blogsite:, and continues to develop VisibleZ, a Java-based product for teaching IBM assembler language.

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Duane Beyer   
Running Linux in a z/VM Virtualized Environment, Manager Operations & Help Desk, Marist College

duane beyerPrior to his employment at Marist College, Duane served as an Advisory Software Engineer and member of the IBM Test and Integration Center for Linux. He holds a B.S. degree in computer science from Marist College and has been awarded US patent # 8145471, for "Non-destructive simulation of a failure in a virtualization environment", issued March 27, 2012. He is a contributing author for " Leveraging Virtualization to Optimize High-Availability System Configurations". IBM Systems Journal. 47, 4 (October 2008), 591-604, and also the "z /OS System z Platform Test Report for z/OS and Linux(December 1996 – December 2010)" and the author of "Tivoli Application Dependency Discovery Manager White Paper (2010)". Duane has 21 years of experience with z/VM and IBM mainframe hardware.


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