awslabs/landing-zone-accelerator-on-aws
Nov 2024 – Sep 2025
11 Months active
Languages Used
ShellTypeScriptJavaScriptMarkdownYAMLyaml
Technical Skills
AWSAWS CDKAWS IAMBackend DevelopmentCDKCI/CD
Brian Crissup
PROFILE
Brian Crissup
Chris Upchurch contributed to the awslabs/landing-zone-accelerator-on-aws repository, focusing on multi-account AWS governance, security, and deployment reliability. Over 11 months, Chris engineered features and fixes for infrastructure as code workflows, using TypeScript, CloudFormation, and the AWS CDK. He addressed challenges in cross-account IAM, network security, and resource provisioning, implementing solutions such as centralized root credential management, KMS-encrypted CloudWatch logs, and robust validation for deployment pipelines. His work improved automation, reduced operational risk, and enhanced scalability for complex AWS environments. Chris’s approach demonstrated depth in cloud security, dependency management, and CI/CD, resulting in a more resilient and maintainable platform.
Overall Statistics
Feature vs Bugs
53%Features
Repository Contributions
39Total
Bugs
14
Commits
39
Features
16
Lines of code
13,504
Activity Months11
Your Network
1424 people
Work History
September 2025
2 Commits
Sep 1, 2025In September 2025, the focus was on hardening multi-account governance in the awslabs/landing-zone-accelerator-on-aws repository. Delivered targeted fixes to improve reliability and security in organization onboarding and Control Tower scenarios, reducing operational risk for multi-account environments. These changes enhance governance accuracy, prevent misconfigurations, and support scalable onboarding for customers.
2 Commits
Sep 1, 2025In September 2025, the focus was on hardening multi-account governance in the awslabs/landing-zone-accelerator-on-aws repository. Delivered targeted fixes to improve reliability and security in organization onboarding and Control Tower scenarios, reducing operational risk for multi-account environments. These changes enhance governance accuracy, prevent misconfigurations, and support scalable onboarding for customers.
September 2025
August 2025
1 Commits
Aug 1, 2025August 2025 monthly summary for awslabs/landing-zone-accelerator-on-aws: Focused on stability and cost-efficiency by implementing a precise Session Manager S3 logging disablement and cleaning up S3-related properties. Disables S3 logging when the s3 logging flag is false and clears S3-related properties to avoid unnecessary resource provisioning and potential errors. This reduces resource usage, simplifies configurations for customers opting out of S3 logging, and improves reliability of Session Manager workflows.
August 2025
1 Commits
Aug 1, 2025August 2025 monthly summary for awslabs/landing-zone-accelerator-on-aws: Focused on stability and cost-efficiency by implementing a precise Session Manager S3 logging disablement and cleaning up S3-related properties. Disables S3 logging when the s3 logging flag is false and clears S3-related properties to avoid unnecessary resource provisioning and potential errors. This reduces resource usage, simplifies configurations for customers opting out of S3 logging, and improves reliability of Session Manager workflows.
July 2025
4 Commits • 3 Features
Jul 1, 2025July 2025 monthly summary for awslabs/landing-zone-accelerator-on-aws: Delivered security hardening, policy governance, and scalability improvements through three key features. Implemented centralized IAM root user credential and session management with enable/disable controls and validation rules. Added KMS-based encryption for CloudWatch VPN logs, including IAM policy updates and test snapshot considerations. Replaced the hardcoded SCP attachment limit with an environment-variable driven configuration to support scalable policy management across organizational units and accounts.
4 Commits • 3 Features
Jul 1, 2025July 2025 monthly summary for awslabs/landing-zone-accelerator-on-aws: Delivered security hardening, policy governance, and scalability improvements through three key features. Implemented centralized IAM root user credential and session management with enable/disable controls and validation rules. Added KMS-based encryption for CloudWatch VPN logs, including IAM policy updates and test snapshot considerations. Replaced the hardcoded SCP attachment limit with an environment-variable driven configuration to support scalable policy management across organizational units and accounts.
July 2025
June 2025
6 Commits • 3 Features
Jun 1, 2025June 2025 outcomes for awslabs/landing-zone-accelerator-on-aws: Key features delivered and bugs resolved with direct business impact. Security and observability improvements: Security Hub forwarding was hardened to emit only high and critical findings to CloudWatch by default, with sample configuration and code updated to default logLevel to HIGH when not provided (commits: 6564c24abd4c60c8c31be0526ad5425eb7e35ab4). Deployment reliability: approval stage now enforces a non-empty email notification list with validation rules and a CFN rule to prevent deployment failures (commit: 750ad97368b163428fca7703402d3430a48fe83f). IAM/pipeline stability: GitHub token change Lambda IAM policy updated to grant necessary permissions for AWS CodeStar Connections to update pipelines (commit: 395b64f4971c5bc2ae6ce05b711464eef63004f4). Regional coverage: added ap-east-2 and ap-southeast-7 to region enumeration and configuration (commit: 89f3cc45f01f6e3d5aeb908b59d76e2fb763be1e). Validation and resilience improvements: allow replacement keys starting with 'resolve' and correctly handle wildcard TLDs in target domain validation (commits: 315ac4cf0f092192ee3d841fedc4675738570271 and a7e83e7084776b36453cfd66654ed7e40f32e14b).
June 2025
6 Commits • 3 Features
Jun 1, 2025June 2025 outcomes for awslabs/landing-zone-accelerator-on-aws: Key features delivered and bugs resolved with direct business impact. Security and observability improvements: Security Hub forwarding was hardened to emit only high and critical findings to CloudWatch by default, with sample configuration and code updated to default logLevel to HIGH when not provided (commits: 6564c24abd4c60c8c31be0526ad5425eb7e35ab4). Deployment reliability: approval stage now enforces a non-empty email notification list with validation rules and a CFN rule to prevent deployment failures (commit: 750ad97368b163428fca7703402d3430a48fe83f). IAM/pipeline stability: GitHub token change Lambda IAM policy updated to grant necessary permissions for AWS CodeStar Connections to update pipelines (commit: 395b64f4971c5bc2ae6ce05b711464eef63004f4). Regional coverage: added ap-east-2 and ap-southeast-7 to region enumeration and configuration (commit: 89f3cc45f01f6e3d5aeb908b59d76e2fb763be1e). Validation and resilience improvements: allow replacement keys starting with 'resolve' and correctly handle wildcard TLDs in target domain validation (commits: 315ac4cf0f092192ee3d841fedc4675738570271 and a7e83e7084776b36453cfd66654ed7e40f32e14b).
May 2025
6 Commits
May 1, 2025May 2025 monthly summary for awslabs/landing-zone-accelerator-on-aws: Delivered resilience and security hardening to support safer, upgrade-friendly deployments across multi-VPC and cross-region environments. Key changes include Route 53 Query Logging association reliability in upgraded environments and strengthened network/IAM controls to improve security posture and Macie integration. These efforts reduce upgrade risk, improve logging reliability, and support compliant export/config session management.
6 Commits
May 1, 2025May 2025 monthly summary for awslabs/landing-zone-accelerator-on-aws: Delivered resilience and security hardening to support safer, upgrade-friendly deployments across multi-VPC and cross-region environments. Key changes include Route 53 Query Logging association reliability in upgraded environments and strengthened network/IAM controls to improve security posture and Macie integration. These efforts reduce upgrade risk, improve logging reliability, and support compliant export/config session management.
May 2025
April 2025
1 Commits
Apr 1, 2025April 2025 Monthly Summary: Delivered a critical bug fix for IPAM Shared Pools scope lookup in the Landing Zone Accelerator project, strengthening provisioning reliability for multi-tenant/shared environments. The fix ensures the IPAM scope is correctly associated with the specific IPAM configuration, reducing provisioning failures and enhancing overall platform stability. Committed change af8d0f3f48d81adcb5161b55ba98cf71f15665a9 in awslabs/landing-zone-accelerator-on-aws and validated in the relevant integration context. This work improves predictable resource allocation and reduces manual troubleshooting for shared pool deployments.
April 2025
1 Commits
Apr 1, 2025April 2025 Monthly Summary: Delivered a critical bug fix for IPAM Shared Pools scope lookup in the Landing Zone Accelerator project, strengthening provisioning reliability for multi-tenant/shared environments. The fix ensures the IPAM scope is correctly associated with the specific IPAM configuration, reducing provisioning failures and enhancing overall platform stability. Committed change af8d0f3f48d81adcb5161b55ba98cf71f15665a9 in awslabs/landing-zone-accelerator-on-aws and validated in the relevant integration context. This work improves predictable resource allocation and reduces manual troubleshooting for shared pool deployments.
March 2025
5 Commits • 1 Features
Mar 1, 2025March 2025 monthly summary focusing on reliability improvements, scoped observability, and deployment configurability for the awslabs/landing-zone-accelerator-on-aws project. Key outcomes include robust CloudWatch Logs subscription handling, corrected Transit Gateway route processing, scoped DNS query logging, and a configurable option to skip StackSet execution roles. These changes reduce operational risk, improve accuracy and observability, and enable safer deployment workflows across accounts/regions.
5 Commits • 1 Features
Mar 1, 2025March 2025 monthly summary focusing on reliability improvements, scoped observability, and deployment configurability for the awslabs/landing-zone-accelerator-on-aws project. Key outcomes include robust CloudWatch Logs subscription handling, corrected Transit Gateway route processing, scoped DNS query logging, and a configurable option to skip StackSet execution roles. These changes reduce operational risk, improve accuracy and observability, and enable safer deployment workflows across accounts/regions.
March 2025
February 2025
1 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary for awslabs/landing-zone-accelerator-on-aws: Focused on maintenance, toolchain hygiene, and build stability. Delivered a major dependency upgrade and associated housekeeping to improve security posture and developer productivity.
February 2025
1 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary for awslabs/landing-zone-accelerator-on-aws: Focused on maintenance, toolchain hygiene, and build stability. Delivered a major dependency upgrade and associated housekeeping to improve security posture and developer productivity.
January 2025
1 Commits
Jan 1, 2025January 2025 monthly summary focusing on stabilizing network-related components in the Landing Zone Accelerator. Addressed a critical failure in the Network Association Stack related to security groups in RAM shared subnets/VPCs by refactoring nested stack detection to correctly handle VPC names that may include region information with dashes, and by adding a warning log when the nested stack cannot be found. This work improves reliability for multi-account networking and reduces deployment risk.
1 Commits
Jan 1, 2025January 2025 monthly summary focusing on stabilizing network-related components in the Landing Zone Accelerator. Addressed a critical failure in the Network Association Stack related to security groups in RAM shared subnets/VPCs by refactoring nested stack detection to correctly handle VPC names that may include region information with dashes, and by adding a warning log when the nested stack cannot be found. This work improves reliability for multi-account networking and reduces deployment risk.
January 2025
December 2024
5 Commits • 4 Features
Dec 1, 2024December 2024 performance highlights for awslabs/landing-zone-accelerator-on-aws: Delivered key features across multi-partition deployments, improved resource recording precision, and hardened validation to reduce operational risk. The team implemented cross-partition governance improvements, extended support for new partitions in service-linked roles, and centralized critical region-determination logic—driving stronger compliance, scalability, and reliability for customers operating across partitions.
December 2024
5 Commits • 4 Features
Dec 1, 2024December 2024 performance highlights for awslabs/landing-zone-accelerator-on-aws: Delivered key features across multi-partition deployments, improved resource recording precision, and hardened validation to reduce operational risk. The team implemented cross-partition governance improvements, extended support for new partitions in service-linked roles, and centralized critical region-determination logic—driving stronger compliance, scalability, and reliability for customers operating across partitions.
November 2024
7 Commits • 4 Features
Nov 1, 2024November 2024: Focused on security, cross-account governance, and pipeline reliability for awslabs/landing-zone-accelerator-on-aws. Delivered features to automate cleanup of ASEA-managed resources, hardened security group handling, enhanced IAM trust policies for cross-account access, expanded SSM parameter management within the Assets module, and improved bootstrap/synthesis reliability to prevent bootstrap failures. These changes reduce manual remediation, tighten security posture, and bolster multi-account scalability.
7 Commits • 4 Features
Nov 1, 2024November 2024: Focused on security, cross-account governance, and pipeline reliability for awslabs/landing-zone-accelerator-on-aws. Delivered features to automate cleanup of ASEA-managed resources, hardened security group handling, enhanced IAM trust policies for cross-account access, expanded SSM parameter management within the Assets module, and improved bootstrap/synthesis reliability to prevent bootstrap failures. These changes reduce manual remediation, tighten security posture, and bolster multi-account scalability.
November 2024
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Quality Metrics
Correctness88.2%
Maintainability87.0%
Architecture84.2%
Performance77.2%
AI Usage21.0%
Skills & Technologies
Programming Languages
JavaScriptMarkdownShellTypeScriptYAMLyaml
Technical Skills
AWSAWS CDKAWS CloudWatch LogsAWS ConfigAWS FMSAWS IAMAWS LambdaAWS OrganizationsAWS SDKAWS Security HubBackend DevelopmentCDKCI/CDCloud SecurityCloudFormation
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