Migration Architect - Mainframe to GCP

Themesoft Inc; Chicago (IL); Hybrid; USD 150,000 - 210,000; Full time

Job summary

The Migration Architect - Mainframe to GCP at Themesoft Inc leads large-scale modernization efforts, guiding strategy and execution to move legacy systems to Google Cloud. You will work closely with senior leadership to define roadmaps and ensure secure, compliant, scalable transitions across complex enterprise environments.

Hybrid role across multiple locations, requiring deep mainframe expertise, strong GCP knowledge, and a track record of delivering end-to-end modernization programs with

Qualifications

• 12+ years in enterprise application/platform architecture.
• 6+ years in mainframe modernization or legacy transformation.
• Proven experience leading enterprise-scale mainframe-to-cloud migration programs.
• GCP architecture and services; cloud migration strategies (re-host, re-platform, re-factor).
• Event-driven and hybrid architectures; security, IAM, compliance, governance.
• DevOps, CI/CD, and automation; experience driving automation initiatives.
• Ability to advise executives and manage senior stakeholders throughout programs.

Responsibilities

• Lead large-scale mainframe modernization and migration programs to GCP.
• Advise executives (VPs, steering committees) on cloud transformation roadmaps.
• Design migration strategies: re-host, re-platform, re-factor.
• Architect GCP Dual Run solutions for parallel testing and risk-free cutovers.
• Develop event-driven integrations using Pub/Sub, APIs, BigQuery, Cloud Storage, GKE.
• Oversee end-to-end GCP architecture: applications, data, networking, security, governance, DR.
• Drive DevOps, CI/CD, automation; support production cutovers and stabilization.

Skills

Mainframe modernization

GCP architecture

Cloud migration strategies

Event-driven architectures

DevOps & CI/CD

Automation

Security & governance

Stakeholder management

Tools

BigQuery

Pub/Sub

GKE

Cloud Storage

Job description

Location : Chicago, IL,Dallas, TX,Atlanta, GA,Seattle, WA,New York, NY,Jersey City, NJ,Nashville, TN

Migration Architect - Mainframe to GCP

Location:

Hybrid across multiple locations - Chicago, Dallas, Atlanta, Seattle, NYC, New Jersey, Nashville

About the job you're considering

Your role

• Senior technical and strategic role responsible for leading large-scale mainframe modernization and cloud migration initiatives on Google Cloud Platform (GCP).
• Requires deep expertise in both legacy mainframe technologies and modern cloud architectures.
• Lead enterprise-scale mainframe modernization and migration programs to GCPAdvise executive stakeholders (VPs, steering committees) on cloud transformation strategies and roadmaps
• Assess and modernize legacy systems built on:
  • COBOL, PL/I
  • CICS, IMS
  • DB2, VSAM
  • JCL, batch workloads
• Design migration strategies:
  • Re-host (Lift & Shift)
  • Re-platform
  • Re-factor
• Architect GCP Dual Run solutions for parallel testing, validation, and risk-free cutovers
• Design event-driven integrations using:
  • Pub/Sub
  • APIs
  • BigQuery
  • Cloud Storage
  • GKE
• Develop end-to-end GCP architecture including:
  • Applications
  • Data
  • Networking
  • Security
  • Governance
  • Disaster Recovery
• Change Data Capture (CDC)
• Reconciliation and rollback
• Performance optimization
• Drive automation, DevOps, CI/CD, and Agentic AI adoption
• Support production cutovers, troubleshooting, and post-migration stabilization

Your skills and experience

• 12+ years in enterprise application/platform architecture
• 6+ years in mainframe modernization or legacy transformation
• Proven experience leading enterprise-scale mainframe-to-cloud migration programs
• GCP architecture and services
• Cloud migration strategies (re-host, re-platform, re-factor)
• Event-driven and hybrid architectures
• Security, IAM, compliance, and governance
• DevOps, CI/CD, and automation
• Deep expertise in mainframe systems, GCP, cloud migration, and automation, capable of leading end-to-end modernization programs - from strategy and design to production deployment and stabilization - while effectively managing senior stakeholders.