Modern SecOps for CISOs

A CISO's view of the operational pillars that separate a SIEM-with-staff from a working security operations function — unified telemetry, detection engineering, automated response, operational maturity. The licence stack is the easy decision; the SOC is the actual programme.

BusinessCapabilityTechnologySource
Compass
  • Businesspersona, use case, outcome
  • Capabilitywhat the org needs to do
  • Technologythe technology choices
  • Sourcewhere the evidence sits
Guided journey · Step 1 of 4

Unified Telemetry

Start here. Without a single coherent telemetry layer, every later pillar produces partial answers. Sentinel onboarding, connector hygiene, and entity normalisation land in this range; rushing it produces tech debt that haunts detection engineering for years.

~ 10 weeks

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Narrative intro

The defining question for a CISO in 2026 is not whether to invest in security tooling — that battle is largely won, with most enterprises holding more security products than they can operate. The question is whether the security operations function actually produces outcomes: incidents detected fast, contained fast, learned from, and prevented next time. Modern SecOps is a discipline more than a product category. The Microsoft estate offers an unusually coherent toolchain — Sentinel as SIEM, Defender XDR as the cross-domain detection layer, Entra ID P2 as the identity-risk signal source, Defender for Endpoint Plan 2 as the host telemetry foundation. The work isn't choosing them; it's operating them as one system, with detection engineering treated as code, automation that's safe to run, and a SOC that survives departures. This briefing covers the four operational pillars that separate a SIEM-with-staff from a working SOC: unified telemetry, detection engineering, automated response, and operational maturity. Each is a programme in its own right. Together they're the difference between a defensible posture and a procurement spreadsheet.

Key takeaways

  • The licence story is largely settled — Sentinel plus Defender XDR plus Defender for Endpoint P2 plus Entra ID P2 is the canonical Microsoft SOC stack.
  • The hard work is operational: detection engineering as code, automation classified by safety tier, blameless reviews, MTTD and MTTR tracked and trending.
  • Sentinel ingest cost is the #1 unpleasant surprise — define ingest budget before connectors, not after the first invoice.
  • A SOC running on heroes doesn't survive single departures — durability is the maturity test, not capability.
  • Insurers and regulators want proof controls work in practice. Runbooks, post-incident reviews, and metrics carry more weight than tool inventories.

Programme shape

Estimated duration
26–52 weeks
Estimated FTE
Dedicated SOC team — analysts on rotation, detection engineer, SOC lead. Mid-market scale 3–5 FTE; enterprise scale typically 10+. Plus part-time security architecture and a risk-management partner.
Spend tier
significant
Risk level
elevated

Most CISOs underestimate the operational lift. Tooling is a 90-day exercise; operational maturity is a 12–24 month programme. Cyber-insurance underwriters increasingly demand proof of the operational pillars in practice — runbooks, post-incident reviews, MTTD/MTTR — not just licence ownership.

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