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Lesson 01 β€” Module Overview

Learning Path

☁️ Phase 2 – AWS Cloud Security

πŸ“˜ Module 03 – AWS Organizations & Multi-Account Security


By the end of this lesson, you will be able to:

  • Understand why enterprises use multiple AWS accounts.
  • Explain the purpose of AWS Organizations.
  • Understand Organizational Units (OUs).
  • Describe the role of Service Control Policies (SCPs).
  • Understand how enterprise AWS environments are structured.
  • Prepare for building the CloudNova enterprise AWS organization.

πŸ“š Lesson Information

Estimated Time: 30–45 Minutes

Difficulty: Beginner to Intermediate

Prerequisites: Module 02 – Identity & Access Management (IAM)

Hands-on Lab: No

Assignment: No


As organizations grow, a single AWS account becomes difficult to manage.

Different teams require different permissions, billing needs, compliance requirements and security controls.

To solve these challenges, AWS provides AWS Organizations, allowing enterprises to securely manage multiple AWS accounts under a single management account.

This enables:

  • Better security
  • Centralized governance
  • Cost management
  • Regulatory compliance
  • Operational scalability

CloudNova Technologies started with a single AWS account.

As the business expanded, new teams began deploying cloud workloads:

  • Development
  • QA
  • DevOps
  • Security
  • Data Engineering
  • AI Engineering

Soon, everyone was sharing the same AWS account.

This created several problems:

  • Production resources mixed with development resources.
  • Developers accidentally modifying production infrastructure.
  • Difficult cost tracking.
  • Shared IAM permissions.
  • Increased security risks.

The Cloud Security Team decided to redesign the environment using AWS Organizations and a multi-account strategy.

Throughout this module, you will help build CloudNova’s enterprise AWS environment.


During this module you will learn:

  • Why enterprises use multiple AWS accounts.
  • AWS Organizations fundamentals.
  • Organizational Units (OUs).
  • Service Control Policies (SCPs).
  • AWS Control Tower.
  • Enterprise governance.
  • Multi-account architecture.

Rather than configuring individual IAM users and roles, you will focus on how large enterprises organize and secure hundreds of AWS accounts.


Module 03
β”‚
β”œβ”€β”€ Lesson 01 – Module Overview
β”œβ”€β”€ Lesson 02 – Why Enterprises Use Multiple AWS Accounts
β”œβ”€β”€ Lesson 03 – AWS Organizations Fundamentals
β”œβ”€β”€ Lesson 04 – Organizational Units (OUs)
β”œβ”€β”€ Lesson 05 – Service Control Policies (SCPs)
β”œβ”€β”€ Lesson 06 – AWS Control Tower Overview
β”œβ”€β”€ Lesson 07 – Enterprise Multi-Account Architecture
β”œβ”€β”€ Lesson 08 – Enterprise Build Project
└── Lesson 09 – Module Review

During this module, you will design the AWS organization for CloudNova Technologies.

CloudNova Organization
Management Account
β”‚
β”œβ”€β”€ Security OU
β”‚ β”œβ”€β”€ Security
β”‚ └── Log Archive
β”‚
β”œβ”€β”€ Infrastructure OU
β”‚ β”œβ”€β”€ Networking
β”‚ β”œβ”€β”€ Shared Services
β”‚ └── CI/CD
β”‚
β”œβ”€β”€ Workloads OU
β”‚ β”œβ”€β”€ Development
β”‚ β”œβ”€β”€ Testing
β”‚ β”œβ”€β”€ Staging
β”‚ └── Production
β”‚
└── Sandbox OU
β”œβ”€β”€ Student Lab 01
β”œβ”€β”€ Student Lab 02
└── Innovation

This architecture will be expanded throughout the remaining AWS Cloud Security modules.


By the end of this module, you will be able to:

  • Explain the purpose of AWS Organizations.
  • Design an enterprise multi-account environment.
  • Organize AWS accounts using Organizational Units.
  • Understand where Service Control Policies fit into governance.
  • Recommend a scalable AWS account structure for an enterprise.
  • Prepare AWS environments for secure growth.

Instead of completing individual labs after each lesson, this module builds one enterprise design.

By the end of the module, you will have designed:

  • CloudNova AWS Organization
  • Organizational Unit (OU) structure
  • AWS Account hierarchy
  • Governance model
  • Security account strategy
  • Shared services architecture
  • Workload separation
  • Enterprise deployment model

  1. Why do enterprises use multiple AWS accounts?
  2. What problem does AWS Organizations solve?
  3. What is an Organizational Unit (OU)?
  4. Why should production and development workloads be separated?
  5. What is the purpose of a Management Account?
  6. Which AWS service helps manage multiple AWS accounts?

Task Status
Understood module objectives ☐
Reviewed CloudNova architecture ☐
Reviewed module roadmap ☐
Understood enterprise project ☐
Ready for Lesson 02 ☐

After completing this lesson, you should understand:

  • Enterprise AWS environments are built using multiple AWS accounts rather than a single account.
  • AWS Organizations provides centralized governance, billing and account management.
  • Organizational Units (OUs) group accounts based on business or technical requirements.
  • This module focuses on enterprise architecture and governance, complementing the IAM concepts covered in the previous module.

➑️ Lesson 02 β€” Why Enterprises Use Multiple AWS Accounts