Major Brazilian energy provider boosts scalability and efficiency with AWS

e-Core • July 31, 2025

With e-Core’s support, the Brazilian energy giant Energisa completed a major cloud migration project, modernizing its infrastructure and improving performance.

About Energisa



Energisa Group is the largest privately held electric power company in Brazil with 100% national capital, representing a complete energy solutions ecosystem. The group employs 16,000 people and operates across four major business fronts: Energisa Distribuidora (Distribution), Energisa Transmissora (Transmission), (re)energisa (Renewables and Innovation), and Voltz (Digital Services).

Energisa worker in truck, using radio, with logo visible. White truck, blue and orange logo.

The challenge


As Energisa expanded its operations and acquired third-party companies, it became essential to establish a centralized governance structure to manage its AWS accounts. This led to the implementation of a Foundation project, which proved critical in ensuring consistent control, security, and efficiency across all accounts.


Alongside the AWS Foundation implementation, Energisa also launched a comprehensive initiative to migrate and modernize its applications. This involved moving existing applications and workloads from on-premises infrastructure to the AWS cloud environment.


One of the key drivers behind adopting the AWS Landing Zone framework was the need to simplify the management of multiple AWS accounts. With different business units operating independently — potentially using diverse services and configurations — it was crucial to establish a standardized approach. The Landing Zone allowed Energisa to centralize account management, providing greater visibility, control, and collaboration across the organization.

The solution



As part of the Foundation project, Energisa took the opportunity to modernize one of its critical front-end applications by transitioning to a serverless architecture. The application, which previously relied on traditional server-based infrastructure, underwent a significant transformation to leverage AWS Lambda and other cloud-native services.


The migration to a serverless environment was facilitated by the Foundation initiative, specifically through the use of AWS Control Tower. AWS Control Tower simplified the setup and governance of the secure multi-account environment required for the serverless architecture. It provided standardized templates and guardrails to ensure compliance with operational and security best practices, making the migration process smoother and more efficient.


As a result, Energisa experienced increased scalability, cost optimization, and operational efficiency. The team can now focus on delivering value to customers without the burden of managing infrastructure, while benefiting from centralized governance and visibility enabled by AWS Control Tower.

Results achieved


The Foundation project brought governance and compliance through continuous monitoring and remediation capabilities. It automatically assessed account compliance against established policies and provided corrective actions for any non-compliant resources or configurations. This helped Energisa maintain a proactive and consistent approach to security and compliance across all AWS accounts.


The serverless architecture delivered greater fault tolerance and high availability. AWS Lambda automatically replicates the application across multiple Availability Zones, ensuring resilience and minimizing downtime. This enhanced reliability was especially important for Energisa’s front-end application, as it ensured uninterrupted access for customers — achieving over 70% availability in the past three months, with 100% uptime in the most recent month according to Route53 health checks.


By incorporating AWS Control Tower into the project, Energisa established a robust and scalable governance model for its AWS accounts. The combination of automated provisioning, guardrail enforcement, centralized management, and continuous monitoring provided by AWS Control Tower significantly streamlined operations, strengthened security, and ensured regulatory compliance across third-party and acquired companies within the Energisa ecosystem.


Looking for more stories like this? Explore other success cases and learn how we support companies across industries on their cloud journey.


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