John Callahan
Senior Application Support Professional at Fiserv
Based in Farmingdale, United States
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Seniority
Staff
Department
Other
Location
Farmingdale
Industry
IT Services and IT Consulting
Company size
33K
Contact information
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j•••••••@fiserv.com
Phone
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Background
About John Callahan
Demonstrated ability to deliver a wide variety of solutions on the IBM i platform Proven track record of engaging management, operations, peers, subordinates, and vendors to determine and document business requirements and objectives, architect appropriate solutions to the problem at hand, and organize projects by identifying and prioritizing tasks for given resources. Expert RPG programming knowledge Advanced SQL experience. DDL database design and implementation. DML Familiar with COBOL, shell scripting, and able to work in open source languages (python, Javascript) Advanced knowledge of IBM i system features and APIs for security, networking and management.
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