Full-Time

Mainframe Systems Programmer

Tss

Posted on 4/14/2025

Ensono

Ensono

1,001-5,000 employees

IT transformation and cloud migration services

Compensation Overview

$65k - $123k/yr

+ Bonus + Equity Grant

Remote in USA

Remote

Category
IT & Security (1)
Requirements
  • Position requires 5 – 10 yrs. Supporting MVS z/OS system environments working with components, subsystems, and any attendant OEM products or ISV.
  • Candidates must possess a thorough understanding of mainframe operating system principals and subsystem components.
  • Team members must be able to work independently and take responsibility for system and subsystem recovery including critical OEM products.
  • Experience using various system monitoring software in problem determination, particularly for performance/response problems.
  • Strong analytical skills required for quick problem determination and isolation of root cause with emphasis on required recovery actions to minimize impact to client business.
Responsibilities
  • Team members are to be available for and to respond to problem calls from operations, or other mainframe support teams.
  • Research reported issues to determine cause and best circumvention and/or resolution, enlisting resources from other teams and customer, as required to provide best response time.
  • Take actions to implement circumvention/resolution and verify results.
  • Communicate to both customer and management the status of issues at intervals during resolution process.
  • Maintain documentation of issue cause, action, and resolution in the designated problem tracking system.
  • Process configuration changes of processors and equipment to meet requirements of customers.
  • Maintain list of vendor software used by customer requiring a product enablement code, documentation on means and method of applying the codes, and expiration data on the products. Apply code updates as necessary to keep products functional.
  • Aid and assist other mainframe teams as required to support them and our clients.

Ensono provides IT transformation services for large organizations, helping modernize IT infrastructure, migrate to cloud platforms, and optimize operations through managed services and consulting. Its work covers mainframe modernization, cloud enablement, data architecture transformation, data center consolidation, and related advisory services. It differentiates itself by offering end-to-end enterprise-grade transformation, combining hands-on migration with ongoing managed services and advisory guidance, with a focus on moving mainframes to the cloud and redesigning data systems. Its goal is to enable faster, more reliable IT operations and greater business velocity by leveraging cloud and data capabilities, allowing clients to focus on their core business.

Company Size

1,001-5,000

Company Stage

Acquired

Total Funding

$76.2M

Headquarters

Chicago, Illinois

Founded

1969

Simplify Jobs

Simplify's Take

What believers are saying

  • Bill Stith's sales leadership accelerates go-to-market expansion across global markets.
  • $250M five-year AI investment positions Ensono as AI-driven managed services leader.
  • SREaaS and Cloud DR services capture growing demand for cloud-native resilience.

What critics are saying

  • IBM zDOME captures 40% mainframe modernization market with integrated watsonx automation.
  • Atos displaces Ensono hybrid IT deals with 30% lower pricing and faster Azure.
  • Kyndryl's EU DORA-compliant AWS mainframe services capture regulated financial sector clients.

What makes Ensono unique

  • End-to-end mainframe to cloud expertise managing infrastructure and applications uniquely.
  • AI-powered Envision Predictive Engine reduces major incidents 22% and MTTR 50%.
  • Cloud-Connected Mainframe for Azure expands hybrid modernization options versus competitors.

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Benefits

Unlimited Paid Time Off

Health Insurance

401(k) Retirement Plan

401(k) Company Match

Paid Maternity Leave

Paternity Leave

Sabbatical Leave

Wellness Program

Flexible Work Hours

Fertility Treatment Support

Company News

PR Newswire
Dec 9th, 2025
Ensono Wins Kong Innovation Award for Fraud Prevention Platform with Pay.UK

Ensono wins Kong Innovation Award for fraud prevention platform with Pay.UK. News provided by. DOWNERS GROVE, Ill., Dec. 9, 2025 /PRNewswire/ - Ensono, a leading technology advisor, innovation partner, and managed service provider, has been awarded Kong's Innovation Excellence Award for its role in delivering a secure, scalable fraud prevention platform for Pay.UK. Pay.UK is the recognized operator and standards body for the UK's interbank retail payment systems. This award celebrates partners who deliver groundbreaking solutions using Kong's platform, and Ensono's work with Pay.UK demonstrates what's possible when innovation meets urgency. The project was driven by a shared commitment to solving a critical industry challenge, transforming a concept into a fully operational, national-scale service in record time. By meeting demanding regulatory deadlines and delivering tangible results for the UK financial services sector, the team showed how collaboration and technical excellence can create lasting impact. "This project showcases the very best of what can be achieved when technology meets agile delivery and deep industry expertise," said James Peet, Director, Identity and Access Management at Ensono. "Winning this award is recognition not just of technical excellence, but of the commitment, creativity, and collaboration it took to tackle a critical national challenge, and doing so in a way that sets new standards across our industry." Tom Jerrard, Product Owner for Confirmation of Payee at Pay.UK, said: "Confirmation of Payee continues to increase trust and reduce misdirected payments, protecting millions of consumers every day. Working with Ensono has allowed us to strengthen this capability even further, ensuring the service remains secure, scalable, and ready for the future." Through an innovative approach with Kong and Pay.UK, Ensono deployed Kong Gateway and Konnect as the backbone of a national fraud prevention platform. Delivered in under eight months, a timeline many believed impossible, the solution is secure, resilient, and future-ready. Together, they enabled Pay.UK to meet strict UK regulatory requirements, supporting 400+ financial institutions and 900 organisations through the full roll out of the Confirmation of Payee and Reimbursement Claims Management programmes. The platform now processes more than 36 million+ Industry API requests annually supporting 63+ million monthly Confirmation of Payee checks with near-zero downtime. "Ensono has been an amazing partner, and this achievement shows what's possible when we combine strengths," said Ken Kim, Senior Vice President of Business Development at Kong. "The speed, scale, and impact of this project were remarkable, and it's been inspiring to work together toward such an important goal. It also reinforces how critical modern API and AI infrastructure has become for driving real business outcomes. I'm looking forward to seeing what we can do together as we go into next year." About Ensono: Ensono is an expert technology advisor, innovation partner and managed service provider. As a relentless ally, we specialize in helping enterprise clients transform their organization, innovate new and disruptive technologies, and optimize their IT operations to achieve better business outcomes. Our dedicated team works across hybrid environments with services that span consulting, mainframe and application modernization, public cloud migration and cloud-native development. With certified experts in Azure and recognized as Microsoft Datacenter Transformation Partner of the Year, Ensono has over 3,800 associates globally and is headquartered in greater Chicago. About Pay.UK: Pay.UK run the UK's retail payments operations, which include the Bacs Payment System, the Faster Payment System and the Image Clearing System. They also deliver a variety of services relating to payments, such as the Current Account Switch Service, Confirmation of Payee and Request to Pay. Media Contact: Walker Sands on behalf of Ensono [email protected] SOURCE Ensono more press release views with

ChannelVision Magazine
Nov 7th, 2025
Ensono Appoints Bill Stith to Leadership Team

Ensono appoints Bill Stith to leadership team. Ensono, a technology advisor, innovation partner and MSP, has appointed Bill Stith as EVP, global sales and marketing. Stith will spearhead Ensono's growth strategy, looking to expand the company's reach, deepen client engagement and unify sales and marketing to accelerate the company's vision for the future of hybrid IT, the company said. He'll also strive to enhance the company's go-to-market effectiveness, elevating industry-specific expertise and strengthening Ensono's partner ecosystem, officials said. Stith's career experience includes leading go-to-market and growth functions at major technology and services companies. He's credited with scaling global organizations, driving revenue growth, and leading sales and marketing teams as well as advancing client relationships across North America and international markets. while delivering large-scale digital transformation, cloud modernization, and AI-enabled innovation, the company said. "Bill is an exceptional leader who combines strategic vision with hands-on execution and a passion for building client-centric organizations," said Marc Capri, president of Ensono. "His experience across global markets and his proven ability to scale high-growth operations will be instrumental as Ensono continues to expand its impact and deliver greater value to clients." "I'm excited to help accelerate Ensono's next chapter of growth and innovation," said Stith. "The depth of talent, the breadth of services and the company's culture of innovation are unmatched. Together, we'll take Ensono's go-to-market strategy to the next level and help clients achieve the transformational outcomes that define the future of IT."

Yahoo Finance
Oct 28th, 2025
Ensono Launches AI & Innovation Division to Power Next-Generation Managed Services

Ensono launches AI & Innovation Division to power next-generation managed services. Ensono further strengthens commitment to AI adoption through collaboration with Snowflake to accelerate IT modernization and digital transformations DOWNERS GROVE, Ill., Oct. 28, 2025 /PRNewswire/ - Ensono, a leading managed services provider (MSP) focused on IT modernization and innovation, today launched the Ensono AI & Innovation Division marking a key milestone in its AI roadmap. Ensono is driving key innovations in managed service delivery for clients, focused on transforming operations and delivery through advanced AI solutions. This new division brings together innovators across engineering, data science, business analysis and software development to aggressively drive customer value through cutting edge innovation. Over the next five years, Ensono will invest $250 million in AI software, training, and research and development, reinforcing its vision to lead in AI-driven managed services and deliver lasting value for clients. "At Ensono, AI is no longer a tool, it's the engine through which we deliver value to our clients, and the operating system we use to run our business," said Jim Piazza, Chief AI Officer, Ensono. "This new organization allows us to build upon the transformational work we are already delivering to our clients and associates." AI is rapidly transforming managed services, and Ensono's strategic adoption is already delivering results for the company and its clients. Ensono's Envision Predictive Engine (EPE) proactively prevents failures across hardware, operating systems, applications, and networks. Since its launch, EPE has achieved a 22% reduction in major incidents and a 50% reduction in major incident mean time to resolution (MTTR). Complementing EPE, Ensono's DiagnoseNow enables Ensono's teams to quickly identify and address problems, keeping client operations running smoothly. When DiagnoseNow is used to troubleshoot, incidents are resolved in less than half the time they normally require. "The days of watching a console and reacting to an outage event are over. Our global associates now anticipate issues before they occur and take proactive steps to prevent major incidents," said Piazza. "We're redefining what it means to be a service provider, fundamentally shifting how we work with clients by leveraging insights at scale to deliver predictive support." When one of Ensono's clients experienced a processing delay in a business-critical system, Ensono's team identified the issue early, minimizing downtime and disruption. The team promptly determined the root cause, implemented a rapid fix, and restored full functionality with zero impact to operations. In another instance, Ensono proactively detected a critical system issue for a leading automotive manufacturer and resolved it before it could result in operational disruption.

Ensono
Jun 12th, 2025
Ensono Wins "Predictive Analytics Solution of the Year" Designation in 2025 AI Breakthrough Awards Program

Ensono wins "Predictive Analytics Solution of the Year" Designation in 2025 AI Breakthrough Awards Program.

Ensono
Mar 27th, 2025
Ensono Named Broadcom Application Network and Security Partner of the Year 2024

is thrilled to share that Ensono has been named the Application Network and Security Partner of the Year 2024 by Broadcom.

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