In telecom, transformation cannot come at the expense of the services customers rely on.

Networks and IT systems need to remain reliable while providers modernize operations, improve efficiency and prepare for next-generation services. Customers expect connectivity to work consistently, even as the organization changes the infrastructure, platforms and operating models behind the scenes.

The pressure is increasing as telecom providers balance network modernization with sustainability goals. GSMA’s Mobile Net Zero 2026 report highlights the importance of renewable energy access in keeping the mobile industry on track for net zero. It also notes that while 5G is more energy efficient per unit of data transmitted, the densification of towers and increased antenna elements means electricity consumption of mobile networks is expected to increase in the near term.

For a leading European telecom provider, these priorities came together in a large-scale modernization program with HCLTech. The provider aimed to create an operational backbone that could power innovation and sustainability at scale. Its objectives included ensuring network and IT reliability, reducing operational and IT costs, addressing legacy challenges and technical debt, improving private cloud efficiency, advancing carbon neutrality targets and building a resilient foundation for next-generation services such as 5G, IoT and edge computing.

The provider’s challenge

Operating in one of Europe’s most competitive and tightly regulated telecom markets, the provider recognized the need to evolve its operational landscape and set new industry benchmarks.

Fragmented legacy processes and manual workflows needed to be replaced with smarter, more integrated systems. The provider also needed to move beyond managing complexity and strengthen operational excellence through unified technology, strong governance and continuous innovation.

This transformation was not only about infrastructure modernization. It was about creating an operating model that could support stability, automation and sustainability at the same time.

Building reliability through controlled change

HCLTech worked with the provider to modernize systems, embed sustainable practices and establish a future-ready operating model.

To ensure uninterrupted service, the provider implemented a Zero Human-Induced Incident framework and embedded an Ops Stability First mindset across operations.

Change management was strengthened through Change with Control governance and rigorous pre-release validation. This supported predictability, control and confidence in every deployment.

For telecom providers, this kind of operational discipline is important because service continuity depends on how change is governed, validated and delivered across complex environments.

Sustainable infrastructure and automation

Sustainability was embedded into the transformation.

With green data center technologies, the provider reduced carbon emissions by nearly 30%, aligning with its carbon neutrality roadmap. Energy-efficient practices became standard across operations, reflecting the provider’s commitment to a responsible digital future.

Automation also played an important role. HCLTech introduced a hybrid agile-lean delivery model to combine speed with structure. Repetitive operational tasks were automated, achieving more than 90% First Time Right outcomes.

The “Ask 5 Whys, Fix Once, Fix Forever” principle supported a shift from reactive fixes to proactive, intelligent automation, improving operational efficiency across the environment.

Enabling AI-driven decision intelligence

The client also began integrating Agentic AI frameworks within operations to shift from deterministic to probabilistic decision-making.

Early pilots in predictive incident management and automated validation enhanced observability, creating a foundation for an AI-driven operations ecosystem.

The partnership continues to advance toward AI-driven observability, predictive operations and autonomous network control. This supports the provider’s evolution from stability to intelligence and its ambition to redefine how a telecom enterprise operates.

Reducing cost and technical debt

The transformation also addressed cost and technical debt.

Modernizing legacy platforms delivered a 40% reduction in IT costs over five years. Through workload rationalization and capacity planning, private cloud operations became more efficient.

The provider also achieved a 15% annual reduction in technical debt, creating room for reinvestment and innovation.

Aligning business and technology

The partnership focused on aligning business and technology priorities.

Initiatives such as One Corpo – Move to Azure helped connect business goals with IT priorities. Rolling-wave planning ensured investments and capacity scaled with business growth, reinforcing a culture of continuous alignment and agility.

This alignment helped ensure that modernization activity remained connected to operational priorities, sustainability goals and future service requirements.

When operational excellence supports sustainability

Telecom transformation is often discussed through separate priorities: reliability, cost, automation, sustainability and future network readiness. This case study shows how those priorities can be addressed through one operating model.

For telecom providers, the work happens in the foundations beneath the service experience: governance that controls change, automation that improves efficiency, AI-driven observability that supports better decisions and sustainable infrastructure that reduces environmental impact.

HCLTech’s work with this European telecom provider shows how stability, automation and sustainability can come together to support a more resilient, efficient and future-ready telecom operating model.

Read the full case study here.