IT Security Implementation - Hardening & DevSecOps
Overview
Harden development workflows, standardize secrets management, complete endpoint/MDM coverage, and operationalize incident readiness.
Objectives
Enforce org-wide repository protections and hygiene (GitHub/GitLab).
Consolidate secrets into an approved manager; move CI/CD to short-lived, federated access (OIDC).
Reach 100% Windows/macOS enrollment with EDR/MDM and escrowed disk encryption; gate unmanaged devices.
Validate SIEM alert routing; finalize comms/escalation; prep Month-3 tabletop.
Scope
Code & Dev: Branch protection, required reviews/checks, secret scanning/push protection, runner isolation, dependency security, CODEOWNERS.
Secrets & CI/CD: Vault integration, env-scoped secrets, token hygiene/rotation, OIDC to cloud roles.
Endpoints & MDM: Windows 10 & macOS 15 enrollment, FileVault/BitLocker escrow verification, conditional access to block unmanaged/BYOD.
Monitoring & IR: On-call alert routing, concise comms/escalation runbooks, tabletop prep (executes in Part 3).
Methods
Change-controlled rollouts with backout plans.
Short stakeholder sessions for approvals/exceptions.
Read-only validation where practical; evidence collection (exports/screenshots).
Mapping to ISO 27001, NIST CSF, CIS Controls.
Key Responsibilities
DevSecOps Controls: Apply org-wide branch protection & required checks; enable secret scanning/push protection; remove plaintext secrets; isolate runners; turn on dependency security updates.
Secrets Standardization: Migrate CI variables to the approved vault; adopt OIDC for pipeline cloud access; define token lifetimes/scopes and rotation norms.
Endpoint & MDM: Achieve 100% EDR/MDM enrollment on Windows/macOS; verify FileVault/BitLocker escrow; block unmanaged/BYOD from sensitive apps via conditional access.
IR Operationalization: Validate SIEM alert routing to on-call; finalize comms/escalation runbooks; prepare the Month-3 tabletop brief.
Deliverables
Repository Governance Pack: Enforced branch protections, required checks, exceptions register; elevated-role review results.
Secrets Hygiene Closure: Org-wide secret scanning enabled; remediation log; CI/CD on vault-backed secrets and OIDC; token policy (max age/permissions).
Endpoint Compliance Set: 100% EDR/MDM enrollment; disk-encryption escrow evidence; conditional-access gating for unmanaged devices; time-bound exceptions.
IR Operational Readiness: Alert-routing tests with acknowledgment workflow; finalized comms/escalation runbooks; tabletop packet ready for Part 3.
Qualifications
GitHub/GitLab org governance (branch protection, checks, secret scanning rollout/remediation).
Enterprise secrets manager integration; CI/CD OIDC federation; retirement of long-lived keys.
Windows/macOS fleet hardening (EDR/MDM enrollment, encryption escrow, conditional access).
SIEM alert routing/testing; incident comms runbooks; strong documentation and change control.
Nice-to-have: ISO 27001/CIS/NIST CSF experience; CISA/CISM/CISSP.
