Senior Mainframe Modernization Architect

Capgemini is hiring a Senior Mainframe Modernization Architect to lead large-scale mainframe-to-Google Cloud Platform (GCP) transformation programs. The architect will serve as both a strategic advisor to executive stakeholders and a hands-on technical leader driving migration, modernization, integration, automation, and cloud adoption initiatives.

Your role

• Define and lead target-state architectures for modernizing legacy mainframe environments into hybrid or cloud-native GCP platforms.

• Design scalable, resilient, and secure solutions integrating mainframe systems with GCP services.

• Develop and execute dual-run/parallel testing strategies to validate migrated workloads, ensuring data consistency, transaction parity, and performance.

• Design event-driven, API-based, and hybrid integration architectures between mainframe and cloud-native systems.

• Drive DevOps, CI/CD, automation, monitoring, and platform engineering best practices.

• Build data and telemetry solutions using Pub/Sub, BigQuery, Cloud Storage, and GKE for migration validation and analytics.

• Define GCP landing zones, security models, IAM, networking, governance, HA/DR, and non-functional requirements (availability, scalability, resilience, security, and cost optimization).

• Ensure compliance, security, encryption, auditability, and access control across migrated environments.

• Collaborate with business, engineering, infrastructure, and security teams to drive modernization initiatives and resolve architecture dependencies.

• 12+ years’ experience in enterprise application and platform architecture.

• 6+ years of hands-on experience in mainframe modernization or legacy transformation.

• Proven success leading enterprise-scale mainframe-to-cloud migration programs.

• Deep mainframe knowledge including z/OS, COBOL, PL/I, JCL, CICS, IMS, DB2, and VSAM.

• Strong experience in mainframe modernization and cloud migration initiatives.

• Demonstrate strong expertise in GCP architecture and services including GKE, Pub/Sub, BigQuery, Cloud Storage, IAM, and networking.

• Possess a solid understanding of event-driven architectures, APIs, and hybrid cloud integration patterns.

• Drive DevOps, CI/CD, automation, observability, and platform engineering best practices.

• Define enterprise security, governance, compliance, encryption, and access management frameworks.

• Experience designing highly available, resilient, scalable, and secure enterprise solutions.

• Lead migration validation activities including dual-run testing, reconciliation, performance benchmarking, and production cutover planning.

• Collaborate with business and technical stakeholders to define modernization roadmaps and target-state architectures.

• Apply strong analytical and problem-solving skills to resolve complex modernization and transformation challenges.

• Excellent communication, leadership, and stakeholder management skills.

• Experience in large-scale cloud transformation programs is preferred and considered a strong advantage.

The base compensation range for this role in the posted location is $82,082 to $193,440

Capgemini provides compensation range information in accordance with applicable national, state, provincial, and local pay transparency laws. The base compensation range listed for this position reflects the minimum and maximum target compensation Capgemini, in good faith, believes it may pay for the role at the time of this posting. This range may be subject to change as permitted by law.

The actual compensation offered to any candidate may fall outside of the posted range and will be determined based on multiple factors legally permitted in the applicable jurisdiction.

These may include, but are not limited to: Geographic location, Education and qualifications, Certifications and licenses, Relevant experience and skills, Seniority and performance, Market and business consideration, Internal pay equity.

It is not typical for candidates to be hired at or near the top of the posted compensation range.

In addition to base salary, this role may be eligible for additional compensation such as variable incentives, bonuses, or commissions, depending on the position and applicable laws.

Capgemini offers a comprehensive, non-negotiable benefits package to all regular, full-time employees. In the U.S. and Canada, available benefits are determined by local policy and eligibility and may include:

• Paid time off based on employee grade (A-F), defined by policy: Vacation: 12-25 days, depending on grade, Company paid holidays, Personal Days, Sick Leave

• Medical, dental, and vision coverage (or provincial healthcare coordination in Canada)
• Retirement savings plans (e.g., 401(k) in the U.S., RRSP in Canada)
• Life and disability insurance
• Employee assistance programs
• Other benefits as provided by local policy and eligibility

Important Notice: Compensation (including bonuses, commissions, or other forms of incentive pay) is not considered earned, vested, or payable until it becomes due under the terms of applicable plans or agreements and is subject to Capgemini’s discretion, consistent with applicable laws. The Company reserves the right to amend or withdraw compensation programs at any time, within the limits of applicable legislation.

Choosing Capgemini means choosing a company where you will be empowered to shape your career in the way you’d like, where you’ll be supported and inspired by a collaborative community of colleagues around the world, and where you’ll be able to reimagine what’s possible. Join us and help the world’s leading organizations unlock the value of technology and build a more sustainable, more inclusive world., Capgemini is a global business and technology transformation partner, helping organizations to accelerate their dual transition to a digital and sustainable world, while creating tangible impact for enterprises and society. It is a responsible and diverse group of 340,000 team members in more than 50 countries. With its strong over 55-year heritage, Capgemini is trusted by its clients to unlock the value of technology to address the entire breadth of their business needs. It delivers end-to-end services and solutions leveraging strengths from strategy and design to engineering, all fueled by its market leading capabilities in AI, generative AI, cloud and data, combined with its deep industry expertise and partner ecosystem.