Senior Security Consultant – AWS Cloud Architecture

Position Summary

AWS Cloud Architect responsible for designing, building, and owning the complete AWS foundation for Gruve's Cisco ISE-as-a-Service (ISEaaS) multi-tenant managed service, with 8+ years of experience in cloud infrastructure and network security environments. Owns the AWS Organization and multi-account landing zone, tenant network architecture, security guardrails, Infrastructure-as-Code, and cloud cost management. This is a hands-on build role: the successful candidate will personally author Terraform modules and design the account structure that every customer tenant is provisioned from, while applying reliability engineering practices to reduce operational toil. Working knowledge of Cisco ISE, RADIUS, and enterprise network security concepts.

Key Responsibilities

• Design and implement multi-account AWS Organization structure, including Organizational Units (OUs), management account separation, and consolidated billing.
• Design and enforce Service Control Policies (SCPs) and organization-level guardrails for tenant isolation and compliance.
• Design tenant network architecture: VPC, multi-AZ subnet design, route tables, VPC endpoints, NAT, DNS (Route 53 private zones including PTR records), and IP address management (IPAM).
• Implement AWS Transit Gateway hub-and-spoke connectivity with per-tenant route tables, Site-to-Site VPN, and Direct Connect.
• Implement AWS security services: IAM and IAM Identity Center (SSO), KMS customer-managed keys, CloudTrail, AWS Config, GuardDuty, and Security Hub.
• Own cloud cost management and FinOps: per-tenant cost attribution, tagging strategy, budget alerts, Cost Explorer and CUR-based chargeback reporting, and cost modeling to support service pricing and margin analysis.
• Design for high availability and disaster recovery across Availability Zones and regions, including backup, restore, and recovery runbooks.
• Apply reliability engineering practices: automation-first operations, toil reduction, failure-mode analysis, and infrastructure observability.
• Implement policy-as-code and security scanning in CI/CD pipelines (Checkov, tfsec, or equivalent).
• Partner with automation and ISE engineering teams to ensure infrastructure outputs integrate cleanly with configuration management.
• Subscribe to and manage the Cisco ISE AMI listing on AWS Marketplace per Region, including EULA acceptance and AMI version/release validation before each tenant build.
• Verify and manage AWS service quotas (EC2 instance types, EIPs, VPC limits) per Region/tenant.
• Configure Network ACLs and manage Elastic IP allocation policy (use only where explicitly required; avoid public exposure of ISE by default).
• Enable VPC Flow Logs for tenant VPCs/subnets where required by security or compliance standards.
• Configure EC2 instance metadata options (IMDSv2) and other instance-level hardening attributes.
• Own EC2 user-data / bootstrap configuration for the ISE AMI (hostname, management IP, NTP, DNS) so it hands off cleanly into the Platform Automation Engineer's post-bootstrap automation.
• Define NTP source design for ISE nodes alongside the existing DNS/Route 53 designs.
• Own the end-to-end AWS infrastructure validation checklist (EC2, EBS, security groups, routing, DNS, NTP, IAM, encryption, monitoring) at each tenant go-live.

Basic Qualifications

• 8+ years of experience in cloud infrastructure, platform engineering, or cloud architecture roles.
• Demonstrable experience designing and building a multi-account AWS Organization or landing zone from the ground up.
• Strong hands-on Terraform experience — candidates should be able to describe modules they have personally authored.
• Solid understanding of AWS networking, including Transit Gateway, VPN, and hybrid connectivity to on-premises environments.
• Experience with cloud cost management, tagging strategy, and cost attribution in multi-tenant or managed service environments.
• AWS Certified Solutions Architect - Professional preferred; AWS Advanced Networking or Security specialty certifications an advantage.
• Experience in a managed services provider (MSP), multi-tenant SaaS, or hosted service environment is highly desirable.
• Familiarity with Cisco ISE, NAC, or enterprise network security concepts is an advantage.
• Strong documentation, design communication, and cross-team collaboration skills.

Preferred Qualifications

• AWS Core: AWS Organizations, Control Tower, Account Factory, Service Control Policies (SCPs), IAM, IAM Identity Center (SSO), EC2, EBS, S3, KMS, Secrets Manager, Systems Manager (SSM), CloudWatch.
• AWS Networking: VPC, Subnets, Route Tables, Transit Gateway, Site-to-Site VPN, Direct Connect, Route 53, VPC Endpoints, NAT Gateway, IPAM.
• Infrastructure as Code: Terraform (module authoring, remote state, workspaces), Git, CI/CD pipelines, policy-as-code (Checkov / tfsec / Sentinel).
• Security & Governance: CloudTrail, AWS Config, GuardDuty, Security Hub, KMS key policies, least-privilege IAM design, multi-tenant isolation patterns.
• Cloud Financial Management: Cost Explorer, Cost and Usage Report (CUR), tagging strategy, budgets and alerts, per-tenant chargeback and cost modeling.
• Scripting & Automation: Python, Bash, PowerShell (any one or more), REST API integration.
• Familiar with Technologies: Cisco ISE, RADIUS / RADSec, 802.1X, Ansible, Azure, Kubernetes.