Senior Mainframe Assembler Developer - Charlotte, NC/ Addison, TX

Experis; Addison (TX); Hybrid; USD 120,000 - 170,000; Full time

Benefits offered by this job

Medical Plan

Dental Plan

Vision Plan

401(k) with match

Weekly Pay

Job summary

Experis, a ManpowerGroup brand, is seeking a Sr. Mainframe Assembler Developer/Engineer to join our client’s Mainframe Support team. This hybrid position is based in Addison, TX or Charlotte, NC, and requires onsite presence three days a week.

You will support mission-critical IBM z/OS assembler applications, analyze complex code, maintain JCL and batch processes, and collaborate across teams to drive system upgrades and reliable batch processing in a regulated financial environment.

Qualifications

• 8+ years of experience in IBM Mainframe application development and production support.
• Deep expertise in Assembler (HLASM) programming, JCL development, and troubleshooting.
• Hands-on experience with Connect:Direct (NDM), ISPW, CA7 scheduling, and TSO/ISPF environment.
• Proven ability to support high-volume financial transaction systems in high-availability environments.
• Strong understanding of mainframe datasets, VSAM, and utilities, along with incident management processes.

Responsibilities

• Support and enhance high-volume, high-availability mainframe applications written in IBM z/OS assembler language.
• Analyze complex assembler codebases to diagnose and resolve critical production issues efficiently.
• Maintain and troubleshoot JCL, GDGs, and batch processing environments to ensure smooth operations.
• Collaborate with cross-functional teams to support system upgrades, platform changes, and process improvements.
• Support check/image item processing and payment platforms within a regulated financial environment.

Skills

HLASM

JCL

NDM/Connect:Direct

CA7 Scheduling

TSO/ISPF

VSAM

Production support

Tools

ISPW

Connect:Direct

Job description

Our client, a leader in financial services, is seeking an Sr. Mainframe Assembler Developer to join their team. As a Senior Mainframe Assembler Developer, you will be part of the Mainframe Support team supporting mission-critical legacy applications. The ideal candidate will have strong analytical skills, independence, and a proactive approach, which will align successfully in the organization.

Job Title: Sr. Mainframe Assembler Developer/Engineer

Location: Charlotte, NC/ Addison, TX (Hybrid: 3 days onsite in office)

Position type: 12+ months contract with high possibility of extension/Conversion

Pay Range

What's the Job?

• Support and enhance high-volume, high-availability mainframe applications written in IBM z/OS assembler language.
• Analyze complex assembler codebases to diagnose and resolve critical production issues efficiently.
• Maintain and troubleshoot JCL, GDGs, and batch processing environments to ensure smooth operations.
• Collaborate with cross-functional teams to support system upgrades, platform changes, and process improvements.
• Support check/image item processing and payment platforms within a regulated financial environment.

What's Needed?

• 8+ years of experience in IBM Mainframe application development and production support.
• Deep expertise in Assembler (HLASM) programming, JCL development, and troubleshooting.
• Hands-on experience with Connect:Direct (NDM), ISPW, CA7 scheduling, and TSO/ISPF environment.
• Proven ability to support high-volume financial transaction systems in high-availability environments.
• Strong understanding of mainframe datasets, VSAM, and utilities, along with incident management processes.

What's in it for me?

• Opportunity to work on mission-critical financial systems in a regulated environment.
• Engagement with cutting-edge mainframe technologies and environments.
• Collaborative team environment with a focus on professional growth.
• Competitive pay aligned with your expertise and experience.
• Potential for career advancement within a global organization.

Upon Completion Of Waiting Period Consultants Are Eligible For

• Medical and Prescription Drug Plans
• Dental Plan
• Vision Plan
• 401(k), Plus Match
• Weekly Pay

About ManpowerGroup, Parent Company of: Manpower, Experis and Talent Solutions.

Experis® is a global leader in technology services and part of the ManpowerGroup® (NYSE: MAN) family of brands. We connect skilled technology professionals with meaningful opportunities where they can grow their careers, expand their expertise and make a real impact. Guided by the belief that it takes Human Ingenuity to unlock the true potential of technology, Experis helps people gain experience with leading organizations, build sought-after skills and take the next step toward a brighter future. Backed by ManpowerGroup's 75+ years of workforce expertise and global reach across more than 70 countries and territories, Experis brings the scale, insight and opportunity to help people and businesses thrive. ManpowerGroup is consistently recognized for its commitment to inclusion, ethics and responsible business, including being named one of the World's Most Ethical Companies. Learn more at Experis.com.