Working at Ensono | Glassdoor

Ensono Overview

Downers Grove, IL
1001 to 5000 employees
Company - Private
IT Services
Unknown / Non-Applicable
Ensono helps IT leaders be the catalyst for change by harnessing the power of hybrid IT to transform their businesses. We accelerate digital transformation by increasing agility and scalability through infrastructure modernization and migration to public cloud. Our broad ... Read more

Mission: Our purpose is to be a relentless ally, disrupting the status quo and unleashing our clients to do great things.

Company Updates

  • At Ensono, we’re committed to providing clients with optimal IT services, and our relationships with established organizations, like IBM, are a testament to that commitment.

    Ensono Achieves Platinum Partner Status with IBM

    IBM is one of the leading providers of mainframe solutions, so as a recognized leader in mainframe management, we're thrilled to announce Ensono has been named a Platinum Partner by IBM.

  • There has never been a more interesting or exciting time to be working in I.T. With the need to marry legacy systems with exciting new technology, our workplace is now richly diverse in a way it has never been before. With up to five generations working together at any one time, the opportunity to learn and flourish is huge. It just needs a little thought, discipline and understanding to make it work.

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Ensono – Why Work For Us?

At Ensono, we provide managed services and solutions for business critical systems across data centers, mainframe and legacy systems, through to public cloud, powered by close working relationships with key partners including AWS, Microsoft and IBM.  We offer a services portfolio built around what our clients need today yet optimizing for the future led by our consulting and advisory services.

But, what truly defines us, is our clients.  The vast majority of Ensono’s clients are large enterprises - we have nearly 200 clients driving our revenue of $600M. This tells you we have deep, strategic relationships with them.

Our clients stay with us, because we have an incredible culture born out of a sense of purpose which is why we have been in the "Sunday Times top 100 companies to work for" for six years.

So the question for our clients really is where do they need to be in the next three years?  How will technology underpin their business operations and transform the way they operate?  And how quickly do they need to get there?  

And the question for you want to be on the leading edge of innovation driving that transformation with our clients?  If yes, then click on the careers tab and search for open positions to join the Ensono team today.  


Our purpose and values are the foundation of our future at Ensono. They give us common language to describe why we’re here, where we’re going and how we’ll get there.

Our purpose: To be a relentless ally, disrupting the status quo and unleashing our clients to do great things.

Values: Whether providing unprecedented solutions for clients or collaborating with each other to make unexpected connections, our team of experts exhibit these core values across every endeavor:

HONESTY: We’re transparent and accountable.

RELIABILITY: We deliver on our promises.

COLLABORATION: We thrive as a team.

CURIOSITY: We relentlessly innovate on behalf of our clients.

PASSION: We love what we do and share our enthusiasm.

I couldn’t be more proud of what our team has accomplished since our launch in January 2016. Our mission to deliver technology services that help clients to be great at what they do continues to drive our business and shapes the way we work with our clients, partners and associates. In a short amount of time we’ve made significant strides in growing our new brand, as evidence by our growth from less than $200 million in revenue in 2015 to more than $600 million today.  During the same period, we have grown our associate base from 650 people primarily in the United States to more than 2,100 associates across the world. undefined

Transform and Innovate
We continue to grow our client base and diversify into new industries. As we speak with clients and prospective clients, cloud is in every conversation right alongside the discussion around optimizing traditional infrastructure solutions.  Companies are looking for ways to not only address the aging workforce and better control escalating software costs, but ways to transform and modernize their business. We are leading those transformative discussions and paving new ways for our clients to deliver an even better experience for their own customers.  

Our associates have done an incredible job delivering technology solutions reliably and collaboratively, and are driven by the excitement to innovate. If this sounds like a great environment to you, we'd love to hear from you.

- Jeff VonDeylen, Chief Executive Officer

Ensono collaborates with its clients to deliver progressive IT solutions to help them operate their infrastructure for today and optimize it for tomorrow. We specialize in supporting mission-critical workloads for the world’s most successful companies. Ensono works across all platforms – mainframe to cloud, and everything in between. 

Mainframe and Midrange Services
Our Mainframe as a Service offerings are customized to seamlessly integrate with a client's operations, whether they are looking to modernize a legacy mainframe infrastructure or seeking to outsource mainframe hosting. We provide the high-touch technical and operational support services that allow our clients to do a lot more with less. 

Managed Infrastructure
We help clients transform their infrastructure and reduce TCO while increasing agility, availability and security. It’s one of the many reasons we’re ranked in Gartner Magic Quadrants for Data Center Outsourcing.

Ensono helps clients drive consistent impact with our Ensono Cloud Transform Framework, a best-practices methodology for public cloud. The Ensono Cloud Transform Framework is delivered via a modular set of services – Cloud Activate, Cloud Migrate, Cloud Optimize, Cloud Operate, Cloud Enable and Cloud Innovate - depending upon the stage of a client's cloud journey and their specific goals and challenges.

Consulting and Advisory
Our Consulting and Advisory practice helps clients gather deep insights on their infrastructure, applications and interdependencies, to design a tailored roadmap to meet their goals.

Application Services
We help clients optimize and modernize applications to reduce costs while meeting business needs.  Availability of their custom and enterprise applications is essential to their business, but management of these critical applications can divert a client's focus from strategic innovations. Ensono’s experienced professionals are trusted by clients to improve the agility, availability and security of their business applications. It’s one of the many reasons we’re ranked #1 in customer satisfaction for IT outsourcing by Data Monitor’s Black Book of Outsourcing.

Ensono is dedicated to cultivating talented individuals with unique skillsets who know how to dream big and build bigger. Our culture is collaborative and results-driven. Curiosity, passion, honesty and reliability are values we live by. Career and professional development is encouraged through promotions, learning opportunities and paid continuing education. 

At Ensono, our associates create their own opportunities as they engineer the future. We are always learning, always collaborating and always innovating while we work as one big family. If this sounds exciting, please visit to view our job openings and apply.

Benefits overview:

  • Paid Volunteer Days
  • Flexible Work Hours
  • Ergonomic Workspaces
  • Free Wellness Programs and Snacks
  • Free onsite fitness facility and personal trainer
  • Beer O'Clock Days
  • Education Assistance
  • Adoption Assistance & Leave
  • Compassionate Leave
  • Paternity Leave

Ensono Reviews

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Recommend to a friend
Approve of CEO
Ensono CEO Jeff VonDeylen
Jeff VonDeylen
56 Ratings
  • Featured Review

    Helpful (7)

    "Growing company"

    • Work/Life Balance
    • Culture & Values
    • Career Opportunities
    • Comp & Benefits
    • Senior Management
    Current Employee - Anonymous Employee in Downers Grove, IL
    Current Employee - Anonymous Employee in Downers Grove, IL
    Positive Outlook
    Approves of CEO

    I have been working at Ensono full-time (More than a year)


    Good benefits, opportunities to work remote, great coworkers, opportunity to work with a global team


    The company has had a lot of growth in a short period of time. Not everything was thought out and well executed when it came to expanding globally, but the company is moving in the right direction to streamline process and synergy within

    Advice to Management

    Continue to listen to associates and include their voice in moving forward

See All 98 Reviews

Ensono Photos

Ensono photo of: Ensono is pleased to support Aflac IT in their fundraising efforts to support the Aflac Childhood Cancer and Blood Disorders Center.
Ensono photo of: Celebrating and honoring our female associates on Women's Day 2019
Ensono photo of: Our executive team celebrating our CEO, Jeff VonDeylen's nomination for EY Entrepreneur of the Year 2019
Ensono photo of: Ensono associates participating in Junior Achievement
Ensono photo of: Ensono associates packing food boxes for Feed My Starving Children
Ensono photo of: The Safety Team in Downers Grove after learning CPR.
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Ensono Interviews



Getting an Interview

Getting an Interview




  1. Featured Interview


    Production Control Analyst Interview

    Anonymous Employee in Downers Grove, IL
    Accepted Offer
    Positive Experience
    Average Interview


    I applied online. The process took 2 weeks. I interviewed at Ensono (Downers Grove, IL) in April 2014.


    Went as planned. Interviewers were nice and very professional. Normal questions about the job and behavioral questions. I had a really good impression of the company and its culture during the interview

    Interview Questions

    • How do you work alone not as part of a team?   Answer Question
    • Do you see yourself working at this same place for a few years to come?   Answer Question
See All 22 Interviews

Ensono Awards & Accolades

  • Partner of the Year, Microsoft, 2018
  • Largest Privately Held Companies, Crain's, 2019
  • UK Cloud Awards, UK Cloud Awards, 2019
  • Advanced Consulting Partner AWS, Amazon Web Services (AWS), 2019
  • 100 Best Companies to Work For, The Sunday Times (UK), 2017
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