Sr. System Engineer (AWS-Focused)

NexusTek is hiring a Senior Systems Engineer specializing in AWS to support hybrid cloud infrastructure for managed services clients. The role handles escalated technical issues, infrastructure projects, security and operational readiness, customer technical reviews, automation and documentation, and rotational on-call coverage.

Responsibilities:

• Support scalable, secure, and highly available infrastructure across AWS and on-premises/hybrid environments, including cloud-native services
• Manage cloud and hybrid security, including IAM, Active Directory/Entra ID, SSO, MFA, vulnerability remediation, encryption, centralized logging, threat detection, and assist with compliance readiness (CMMC 2.0, SOC 2, HIPAA)
• Resolve escalated  customer issues
• Monitor platform health, SLAs, and service metrics; proactively identify risks, remediate issues, and maintain disaster recovery, backup validation, and operational readiness
• Serve as a primary or secondary engineer on infrastructure projects, including cloud migrations, modernization, customer onboarding, offboarding, and lifecycle/EOL upgrades; contribute to technical assessments, scoping, solutioning, and SOW reviews
• Partner with customer technical stakeholders through remote technical reviews, infrastructure health assessments, lifecycle planning, and long-term remediation strategies; identify and communicate new service opportunities
• Develop and maintain runbooks, technical documentation, and knowledge-sharing resources; mentor engineers and contribute to certification roadmaps and internal technical training programs
• Drive continuous improvement by taking ownership of engineering processes, tools, and documentation; communicate progress, blockers, and risks proactively while fostering accountability and team learning
• Participate in rotational after-hours on-call coverage, responding to escalations beyond L1/L2 capabilities within SLA commitments and ensuring thorough incident documentation and handoffs

Requirements:

• Strong AWS infrastructure experience, including EC2, Auto Scaling, ALB/ELB, Multi-AZ architecture, VPC networking, Route 53, ACM, and cross-account IAM
• Experience with AWS monitoring and troubleshooting (CloudWatch, Lambda, EventBridge), database backups and recovery (RDS, AWS Backup), and cloud cost management
• Windows Server Administration
• Scripting & Automation (Python, Bash, PowerShell)
• Backup & Disaster Recovery (Veeam/Commvault, replication, failover testing)
• Monitoring & Observability (CloudWatch, LogicMonitor, N-Able, SIEM)
• EC2, Auto Scaling & Compute Services
• VPC & Hybrid/Cloud Networking
• S3 & EBS Storage
• Organizations / Multi-Account Architecture
• Ansible / Configuration Management
• Managed Service Provider (MSP) experience is highly valued and strongly preferred
• Experience using ConnectWise ticketing system
• Security & Compliance Frameworks (CMMC 2.0, SOC 2, HIPAA)
• Infrastructure as Code (Terraform)
• Kubernetes & Docker
• AWS Certified Solutions Architect – Associate or Professional
• AWS Certified SysOps Administrator – Associate
• Microsoft Certified: Azure Administrator Associate (or equivalent)