Mainframe Modernization Architect

Posted Yesterday
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Hiring Remotely in United States
Remote or Hybrid
156K-210K Annually
Senior level
Cloud • Information Technology
Support mission critical workloads, modernize IT infrastructure and reduce total cost of ownership.
The Role
Lead mainframe modernization and migration architecture for large global clients. Conduct discovery workshops, assess legacy environments, develop transformation and re-platforming solutions, present technical business cases, and advise executives. Partner with sales, consulting, operations, product management, and clients to create solutions, influence technology roadmaps, drive stability and innovation, and support complex opportunities. The role requires deep mainframe expertise across legacy languages, databases, operating systems, infrastructure, and modernization technologies.
Summary Generated by Built In
Expert Technology Consultant – Mainframe Modernization Senior Architect

At Ensono, our Purpose is to be a relentless ally, disrupting the status quo and unleashing our clients to Do Great Things!  We enable our clients to achieve key business outcomes that reshape how our world runs. As an expert technology adviser and managed service provider with cross-platform certifications, Ensono empowers our clients to keep up with continuous change and embrace innovation.

We can Do Great Things because we have great Associates. The Ensono Core Values unify our diverse talents and are woven into how we do business. These five traits are the key to achieving our purpose:

Honesty, Reliability, Curiosity, Collaboration, and Passion.

About the role and what you'll be doing:

  • Collaborate with their counterparts in the Sales and Consulting organizations to create Pursuit, Solution, and Sales strategies for large existing global clients 
  • Conduct discovery and assessment workshops (often in collaboration with resources from consulting, operations and product teams) to help drive further penetration of the client account 
  • Develop and document solutions that meet client’s (technical and business) requirements and allow them to adapt to changing industry needs with a focus on transformation and re-platform efforts 
  • Conduct solution development sessions and present technical solutions and business cases to a wide variety of audience 
  • Gain executives buy in for complex solutions by engaging in executive and senior-level technology discussions 
  • Gain clients’ confidence as a trusted advisor by offering consultation and recommendations drawing from technology know-how and past experiences 
  • Align and partner with Product Management to help drive appropriate product enhancements and changes to technology roadmap 
  • Aid in driving stability and innovation within the client’s current and future state and create solutions based on client requirements and available product offerings 

We want all new Associates to succeed in their roles at Ensono. That's why we've outlined the job requirements below. To be considered for this role, it's important that you meet all Required Qualifications. If you do not meet all of the Preferred Qualifications, we still encourage you to apply. 

Required Qualifications:

  • Bachelor’s degree in engineering or computer sciences. 
  • 20+ years of experience as an architect or equivalent in the hosting and network space (preferably with a service provider). 
  • Over 12 years' experience as a Modernization or Migration Architect, leading legacy system upgrades to new platforms with minimal business disruption. 
  • Hands-on experience with Mainframe Application migration and legacy modernization projects. 
  • 15+ years of experience with strong expertise across the mainframe technology stack, including COBOL, Natural, Adabas, Easytrieve, Db2, IMS, JCL, CICS, VSAM, RACF, z/OS, PL/I, and Assembler. 

Preferred Qualifications:

  • Proven experience in managing projects through the entire project lifecycle. This includes managing multi-phase/multi-dimensional/multi-resource projects to conclusion while maintaining high client satisfaction. 
  • Demonstrated expertise in data migration, with a strong emphasis on understanding and working with legacy data structures to effectively convert and modernize them into modern database platforms. 
  • Skilled in evaluating mainframe legacy applications and developing comprehensive modernization plans. 
  • Demonstrated development experience with modern Java and C# frameworks, including designing and implementing scalable enterprise applications. 
  • Additionally, has extensive experience working with Python, applying the language for scripting, automation, data analysis, and developing scalable backend systems that facilitate enterprise modernization efforts. 
  • Understanding of (and experience with) public cloud platforms (AWS, Azure) and hybrid solutions preferred .
  • Demonstrated ability to understand and leverage Artificial Intelligence, applying AI-driven strategies and tools to modernize legacy systems and enhance data migration efforts.  
  • Skilled in identifying use cases for AI within legacy modernization practices, driving innovation by integrating intelligent automation, advanced analytics, and machine learning solutions to streamline processes and create future-ready technologically.
  • Well versed in the hosting technology landscape including compute, storage, backup, network, security, DR, DevOps and IT governance.
  • Good understanding of the sales process for large and complex opportunities. 
  • Resourceful and confident in Crisis and Expectation management and confident under pressure. 
  • Has experience in technical documentation to capture solution components in a timely manner while ensuring acceptable level of detail, data integrity, and accountability. 
  • Ability to share knowledge and expertise among various organizations within the company and to facilitate teamwork among those organizations to better serve our clients. 
  • Ability to work in a team environment and demonstrate strong problem-solving skills. 
  • Proficient with common office applications such as MS Outlook, MS Excel, PowerPoint and MS Visio. 
  • Excellent organizational, interpersonal, and communication skills (oral, written and presentation. 
Why Ensono?

Ensono is a place to make better happen – for our clients and for your career. You can do great things through innovation or collaboration, by learning or volunteering, or to promote diversity and inclusion. You can do great things for your own health or for a healthier planet. Whatever it means to you to do great things we want Ensono to be the place you can do it. 

We are a client-facing business, but we do encourage clients to allow us to work remotely most of the time so if you are not required to be on a client site, you can choose to work from home or in our Ensono offices.

Some of our benefits include:

  • Unlimited Paid Days Off
  • Three health plan options
  • 401k with company match
  • Eligibility for dental, vision, short and long-term disability, life and AD&D coverage, and flexible spending accounts
  • Family Forming Benefit including fertility coverage and adoption/surrogacy reimbursement
  • Paid childbearing and paternal leave
  • Education Reimbursement, Student Loan Assistance or 529 College Funding
  • Sabbatical leave
  • Wellness program
  • Flexible work schedule

As of the date of this posting, a good faith estimate of the current pay scale for this role is $156,000 to $210,000 annually based on a full-time schedule. Please note that placement in the range may vary based on numerous factors including but not limited to skills, experience, internal equity, and business needs. In addition to base salary, other compensation programs, depending on eligibility, include an annual bonus plan based on company and individual performance and an equity grant under our Associate Equity Appreciation Program.

Ensono is an Equal Opportunity/Affirmative Action employer. We are committed to providing equal employment to our Associates and building a diverse and inclusive workforce. All qualified applicants will be considered without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, protected veteran status, disability, or other legally protected basis, in accordance with applicable law.

Pay transparency nondiscrimination statement/posting OFCCP’s pay transparency policy can be found on OFCCP’s website.

If you need accommodation at any point during the application or interview process, please let your recruiter know or email [email protected].

Skills Required

  • Bachelor's degree in engineering or computer science
  • 20+ years of experience as an architect or equivalent in hosting and network environments, preferably with a service provider
  • 12+ years of experience as a modernization or migration architect leading legacy system upgrades
  • Hands-on experience with mainframe application migration and legacy modernization projects
  • 15+ years of expertise across the mainframe technology stack, including COBOL, Natural, Adabas, Easytrieve, Db2, IMS, JCL, CICS, VSAM, RACF, z/OS, PL/I, and Assembler
  • Experience managing multi-phase, multi-dimensional, multi-resource projects through the full project lifecycle
  • Experience with data migration and legacy data structures
  • Ability to evaluate mainframe legacy applications and develop modernization plans
  • Development experience with modern Java and C# frameworks
  • Extensive experience with Python for scripting, automation, data analysis, or backend systems
  • Experience with AWS, Azure, and hybrid cloud solutions
  • Ability to apply artificial intelligence, intelligent automation, analytics, and machine learning to legacy modernization
  • Knowledge of hosting technologies including compute, storage, backup, network, security, disaster recovery, DevOps, and IT governance
  • Understanding of sales processes for large and complex opportunities
  • Crisis and expectation management skills
  • Technical documentation experience
  • Ability to collaborate across organizational teams and share technical expertise
  • Strong problem-solving, organizational, interpersonal, communication, and presentation skills
  • Proficiency with Microsoft Outlook, Excel, PowerPoint, and Visio

Ensono Compensation & Benefits Highlights

The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Ensono and has not been reviewed or approved by Ensono.

  • Leave & Time Off Breadth — Time off provisions include unlimited PTO, paid volunteer time, and a formal sabbatical program. These offerings provide flexibility for rest, community service, and extended renewal.
  • Retirement Support — Retirement support includes a 401(k) with company match as part of the core package. This adds long‑term financial value alongside day‑one eligibility for other coverage.
  • Parental & Family Support — Family‑forming coverage and paid parental leave are explicitly included, with adoption and surrogacy reimbursement. These benefits support diverse paths to growing a family.

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The Company
HQ: Downers Grove, IL
3,000 Employees
Year Founded: 2015

What We Do

Ensono helps IT leaders be the catalyst for change by harnessing the power of hybrid IT to transform their businesses. Our broad services portfolio from mainframe to cloud, powered by an intelligent governance platform, is designed to help our clients operate for today and optimize for tomorrow. We are award-winning certified experts in AWS & Azure

Why Work With Us

Our culture is collaborative & results-driven. Curiosity, passion, honesty & reliability are values we live by. Career & professional development is encouraged through promotions, learning opportunities, Ensono University - eTalks, training academies, paid tuition and study leave, quarterly Innovator Awards. Thinking Thursdays (no meetings 8 to 12)

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