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The Expertise For Your Toughest Challenges

Managing more than $22 billion in expenses for enterprises of all industries across the world is no easy task. Calero-MDSL leverages learnings to provide innovative solutions and insights across each spend category.


You Need A Partner Who Delivers

Apply decades of results (not just experience) to
your technology environment.

Having experience is one thing. Generating results is another. Providing value over the long-term demonstrates our commitment to our customers, listening to their challenges and innovating new solutions.

Calero-MDSL Video - Centers of Excellence with Patrick Mulvehill


Speak With An Expert

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Countries Deployed


Billion Managed


Mobile Devices

We Are the Recurring Expense Management Experts

Our solutions drive outcomes for more than 3,000 of the largest and most complex technology environments in the world that span a variety of industry verticals, unique use cases and broad geographic needs.

We chose Calero-MDSL because they successfully demonstrated to us their extensive knowledge of Global telecom providers, contracts and billing. They go the ‘extra mile’ for their customers and the customer is always first.
Patrick O'Brien
Head of Telecoms Centre of Excellence, Danfoss
We would not have got here without the Calero-MDSL team and want to recognize their efforts in helping us achieve a successful go-live.
Rob Kordek
Director of Network Architecture, Alight
One of the greatest values is that I have a very accurate picture of all the services we provide to various departments.
Chris Magill
George Washington University
My management team was very pleased to see the volume of savings we have booked into the system and thanks for all your efforts to drive many outstanding items to a close, it truly helps me to show the value of the service.
Gary Fortune
Global Mobility Manager, SAP
Excellent TEM provider. The account and leadership team is excellent to work with and extremely willing to work through any challenges encountered to find an agreeable solution.
Sr. Director
ICT Network and Telecom, Energy and Utilities Enterprise
Calero-MDSL MMS is the best solution to maximize the value of your investment in mobility. Calero-MDSL is the right balance between capabilities, cost, security. It controls permissions of all employees by using their devices, which reduces corporate risks.
Data and Analytics Professional
Communications Enterprise
Calero-MDSL has provided us with a valuable service that has helped us to optimize our cellular service spend. They do exactly what we ask them to do. They have offloaded a significant portion of our day-to-day activities related to ordering devices, managing cellular costs, and providing reporting to our managers and end users.
Infrastructure and Operations Professional
Manufacturing Enterprise
The training sessions are on point and valuable. Audit and optimization, along with the TEM dashboards set the bar.
Manufacturing Enterprise
The day to day process of processing invoices/paying the vendors is wonderful.
Senior Analyst
Transportation Enterprise
The implementation team was over the top great to work with, accommodating and on point the entire project.
IT Manager
Manufacturing Enterprise
Telecom bills are a lot of work. Thanks to the Calero-MDSL team we are able to work through many billing challenges.
Manager, Network Engineer
Healthcare Enterprise
My ultimate goal is to have things run smoothly and efficiently across the entire communications continuum: Calero-MDSL has helped me take back control. I couldn't ask for a better account team – the people we have are exceptional. They know the platform, they know the processes and they know my goals. Collaborating with Calero-MDSL has a wonderful effect on eliminating headaches!
Telecommunications Engineer
Healthcare Enterprise

Interested in results? Let’s work together.

We start with understanding YOU: your environment, your challenges and your desired results. We share insights throughout the process with a focus on outcomes. Outcomes that matter.

Submit An RFI/RFP