Senior Mainframe Engineer (IMS/CICS) – L3 Support, Onsite

Delta System & Software, Inc.; Wilmington (DE); On-site; USD 120,000 - 180,000; Full time

Job summary

Delta System & Software, Inc. is seeking a Senior Mainframe Developer (IMS and CICS) to lead development, debugging, and maintenance in a large corporate environment. The role focuses on COBOL, IBM Z/OS, and related mainframe technologies, with exposure to API integration and cloud concepts.

The position requires 10+ years of experience, onsite Wilmington, DE, with 5 days per week in the office, and rotation-based weekend support. AWS and modern front-end familiarity are a plus.

Qualifications

• 10+ years of hands-on software development experience.
• Experience in mainframe environments with COBOL, CICS, IMS DB/DC, and DB2.
• Knowledge of SDLC and agile practices including CI/CD, security, and resiliency.
• Experience in large corporate environments with modern programming and querying languages.

Responsibilities

• Perform L3 support and issue resolution.
• Conduct maintenance and support activities.
• Provide on-call weekend support (rotation).
• Support 13x7 rotation schedule.
• Coordinate with offshore teams.

Skills

Mainframe development

CICS/IMS COBOL expertise

CI/CD and DevOps

Systems analysis

AWS experience

Tools

IBM Z/OS

COBOL

CICS

IMS DB/DC

DB2

VSAM

JCL

CA7

Changeman/Endeavor

WebSphere MQ

zOS Connect

Kafka

Job description

Delta System & Software, Inc. is seeking a Senior Mainframe Developer (IMS and CICS) to lead development, debugging, and maintenance in a large corporate environment. The role focuses on COBOL, IBM Z/OS, and related mainframe technologies, with exposure to API integration and cloud concepts.

The position requires 10+ years of experience, onsite Wilmington, DE, with 5 days per week in the office, and rotation-based weekend support. AWS and modern front-end familiarity are a plus.