Expedite Talent Solutions · 2 days ago
US_East | Platform Engineering - Linux/Unix Admin_L3
Bloomfield, NJ
Full-time
Onsite
Mid LevelExpedite Talent Solutions is looking for a K3s Security Engineer to enhance the security of K3s clusters. The role involves implementing security measures, hardening clusters, and ensuring isolation within Kubernetes environments.
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Responsibilities
Design and implement security-first cluster configurations for K3s nodes
Enforce mandatory access control (MAC) using SELinux and AppArmor profiles for pods and system services
Integrate TPM-based attestation and secure boot for cluster nodes to ensure trust in hardware and OS integrity
Establish node, pod, and namespace isolation strategies to reduce lateral movement risk
Harden cluster components (API server, etcd, kubelet) following CIS and NSA Kubernetes security benchmarks
Define and enforce workload sandboxing strategies (seccomp, AppArmor, SELinux contexts, gVisor/Kata if applicable)
Configure minimal privilege policies (RBAC, PodSecurityStandards, NetworkPolicies) to ensure least-privilege execution
Implement namespace, node pool, and hardware partitioning to confine workloads and protect sensitive applications
Apply resource quotas, limits, and scheduling constraints to contain denial-of-service blast radius
Work with Security team to ensure strong identity, authentication, and authorization models
Integrate TPM-backed secrets storage and HSM/KMS systems for cryptographic operations
Ensure secure distribution of workload secrets with solutions like SealedSecrets, HashiCorp Vault, or SOPS
Enforce image signing and verification with cosign or Notary
Integrate SBOM scanning and vulnerability management into CI/CD pipelines
Monitor workloads for runtime anomalies (Falco, Cilium Tetragon, or equivalent)
Apply kernel hardening measures (seccomp-bpf, kernel lockdown, IMA/EVM with TPM)
Build observability hooks for security events (audit logs, syscall monitoring, TPM attestations)
Define blast radius response runbooks for compromised pods or nodes
Work with SRE and Security teams to test chaos/security drills simulating breaches
Qualification
Required
Strong knowledge of K3s/Kubernetes internals, especially security features
Hands-on experience with SELinux, AppArmor, seccomp, and Linux capabilities
Experience with TPM (Trusted Platform Module) for secure boot and attestation
Deep understanding of Pod Security (PodSecurityPolicies/Standards, OPA/Gatekeeper/Kyverno)
Experience implementing RBAC, NetworkPolicies, and workload isolation at scale
Proficiency in Linux kernel security mechanisms and debugging
Familiarity with container runtimes (containerd, CRI-O, gVisor, Kata) and their security implications
Strong background in incident response, forensic data collection, and audit logging in Kubernetes
Preferred
Contributions to Kubernetes SIG-Security or open-source security tooling
Experience with supply chain security frameworks (SLSA, NIST 800-190)
Familiarity with confidential computing (TEE/SGX/SEV) for workload isolation
Hands-on with Cilium Tetragon, Falco, or other runtime security tools
Knowledge of air-gapped deployments and hardened Linux distributions (e.g., Flatcar, Bottlerocket)
Company
Expedite Talent Solutions
Expedite Talent Solutions is a minority- and woman-owned firm delivering agile staffing, project outsourcing, and professional services to clients across the Healthcare, Commercial, and Public Sectors.
Founded in 2009
51-200 employees
Funding
Current Stage
Growth StageLeadership Team
Sandeep Singh
Associate Director / Sr. Client Partner
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