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CISO Times

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The CISO Decision Brief

If…, then how…

If my predecessor left without a handover, then how do I rebuild what I need?

7 decision pointsThe pack behind this answer: CISO Transition, Handover & First 90 Days

Add to board memo

The short answer

Recommendation
Do not wait for a handover that will not come. In week 1, confirm your predecessor's access is removed and that you know every open incident and reporting duty. Then rebuild the handover document from records, ask the people who worked with them, and mark every gap instead of guessing.
Reasoning
A function with no handover still has records: registers, incident logs, correspondence, contracts and the identity system. Live access and open incidents are the gaps that cost most, so they come first. Where the outgoing leader has gone, the new leader builds the document from records and writes down what is missing (rule TR-06). A gap that is written down can be planned for, and a hidden one cannot.
Considerations
  • Whether your predecessor may be asked for help depends on their contract and any agreement on leaving. HR and Legal confirm it, and Legal decides how to ask.
  • The 2 working days to confirm access removal and the 30 days for contacts and inherited exceptions are the pack's defaults. Your own standard may set different ones.
  • Each inherited exception or risk acceptance goes to the approver its band sets. Nothing continues by default, and nobody approves what they requested or own.
  • If you are an essential or important entity under NIS2, tell the management body through the executive sponsor that the head of security has changed. Counsel confirms what that means.

The decision, step by step

Select any step for the reasoning behind it and where the pack covers it.

  • Start
  • Step
  • Decision
  • Outcome

Keyboard: Tab to a step, arrow keys move along the flow, Enter pins its explanation, + and − zoom, 0 fits the diagram, Esc closes. The text version below has the same content.

Where a step quotes a number, it is the default in the CISO Times pack. Your own standard may set a different one.

Read as text

The same flow written out: each step, its reasoning and where the pack covers it. 22 steps.
  1. Start

    Your predecessor has gone and left no handover

    A function with no handover is not a function with no records. The risks, exceptions, incidents, contracts and accounts exist somewhere, and so do the people who know them. The task is to rebuild the handover from those records and write down what is missing. Start in week 1 and do not wait for anyone to produce it.

    In the pack

  2. Step

    Change nothing and promise nothing yet

    You do not yet know what is real, so a promise or a change rests on what you were told. Until discovery ends, change no policy, tool, team structure or priority, except to stop harm, act on a legal duty or take a no-regret action. Promise no date, budget or result to executives, customers, auditors or regulators until you have checked it can be kept.

    In the pack

  3. Decision

    Is their access removed, and checked against a fresh extract?

    Accounts, administrator rights, tokens, shared secrets, vendor portals and any personal account used for work can stay live after a leaver. The pack's default is removal on the day they leave and confirmation against a fresh extract within 2 working days. Where nobody can show the extract, answer no.

    In the pack

  4. Step

    Remove it now and take a fresh extract to confirm

    Ask each system owner, or the head of IT where that is who holds them, to remove the accounts, rights, tokens and portal logins, and to give you an extract taken after the removal. Check the identity system, the vendor portal admin lists and the password manager's shared vaults, because secrets known only to the predecessor are the ones that get missed. Keep the extract as the record.

    In the pack

  5. Decision

    Is any incident or reporting duty open, or not known?

    Read the incident log and the post-incident reviews, and ask the incident responders and legal. An incident or a notification dropped at a handover is one of the costliest gaps. If you cannot tell whether one is open, take the yes branch.

    In the pack

  6. Step

    Confirm who holds each incident role, in writing

    List each open incident and reporting duty, and confirm in writing who holds each incident role and who deputises. The roles, decision rights and clocks stay as the incident plan sets them. Do not change who decides during a live incident, and do not take a right the plan does not give the head of security.

    In the pack

  7. Step

    Start the handover document from records, section by section

    Use the twelve sections of the handover form as the checklist, and mark each Built from records. The risk and exception registers, incident log, correspondence with customers, auditors and regulators, the supplier register, the identity system and the board calendar each answer a part. Say who was asked for what the records do not show.

    In the pack

  8. Decision

    May you ask the predecessor for help, and has Legal said how?

    Whether a departed leader may be asked to help depends on their contract and any agreement on leaving. HR and Legal confirm that, and Legal decides how to ask. This pack gives no employment advice. If nobody has confirmed it, answer no and ask others first.

    In the pack

  9. Step

    Put short written questions to them, and ask others too

    Many outgoing leaders will answer a short question after they have left, if asked politely and early. Keep each question narrow, such as who holds a supplier relationship or where a record is kept. Still ask their manager, their team and the people who worked with them, and do not blame the predecessor in front of others.

    In the pack

  10. Step

    Ask their manager, team and colleagues instead

    The people who built the programme know the most. Ask the manager, the team and the people who worked with the predecessor, and note who said what. Record what you find, not who is to blame. Revisit the predecessor once Legal and HR have said how to ask.

    In the pack

  11. Step

    Fill the sections that cannot wait: contacts and promises

    Start with the regulator, the CSIRT, the insurer, the responders and the critical suppliers, and confirm each contact by a call, not from a list. The pack's default is within 30 days. Then list what the organisation has promised to regulators, customers and auditors, and note each as Noted, not committed until you have checked it can be kept.

    In the pack

  12. Decision

    Is an inherited exception or acceptance past review, or unapproved?

    List every inherited exception and risk acceptance with its band, approver and review date. Where an approver is not recorded or the review date has passed, answer yes. Nothing continues by default, so read each approval before you rely on it.

    In the pack

  13. Step

    Have the band's own approver renew, change or close it

    The pack's default is a review within 30 days of the start. Each item goes to the approver its band sets, as the exception and risk-acceptance rules say, and nobody approves what they requested or own. Accept no new risk yourself in the first 30 days under the pack's arrangement; take it to the accountable executive and the sponsor.

    In the pack

  14. Decision

    Can a named person say a section has nothing to list?

    None is an acceptable answer only for risks, exceptions, incidents, commitments and suppliers, and only with a date and the name of the person who said it. For roles, contacts, access, programme state and the calendar, an empty section is a gap. If nobody can say it, answer no.

    In the pack

  15. Step

    Write None, with the date and who said so

    Use None for a section where it is allowed, once a named person with knowledge has said so. Do not infer it from silence in the records. Your own reading of an empty register is not a statement from someone who would know. The date and the name are what make it checkable.

    In the pack

  16. Step

    Mark the section Missing or Partial, and who was asked

    A gap that is written down can be planned for, and a gap that is hidden cannot. Mark the section Missing or Partial, with what you asked, of whom and when. Do not guess a value to fill a section, and do not leave it blank.

    In the pack

  17. Step

    Check what you built against a record, test or system view

    The handover document is what someone believed, or what the records suggest. Treat a statement alone as Described only, and move on to Evidenced only when you have seen a record, a test result or a system view. Use the discovery workbook for the ten areas, starting with those the interviews raised.

    In the pack

  18. Decision

    Might NIS2 apply to the organisation, or is that not known?

    NIS2 Article 20 asks the management body to approve the cybersecurity risk-management measures, oversee their implementation and follow training. Whether the organisation is an essential or an important entity is for counsel to confirm. If nobody has confirmed it, take the yes branch.

    In the pack

  19. Step

    Tell the management body through the sponsor that the leader changed

    In a regulated entity, tell the management body promptly, through the executive sponsor, that the head of security has changed and what has been handed over. Counsel confirms what this means for the liability of its members. Registration with the authority and open notifications belong in the incident and contacts sections.

    In the pack

  20. Decision

    Are all twelve sections complete and the form signed?

    Count the sections as complete or not, for example 9 of 12 complete, and list the gaps by kind: Missing, Partial, access not confirmed removed and not signed. A predecessor who has gone cannot sign. Judgement: leave that section Not signed and say why, rather than signing on their behalf. Where it is a gap, carry it into the plan.

    In the pack

  21. Outcome

    Carry each gap into the 100-day plan as an item

    Every plan item names its source, and a handover gap is a source by its section ID. Give each an owner, an effort and a due date. Report the handover as counts of sections complete and gaps by kind. No score. Bring the gaps that need a decision to the first executive briefing, and keep the records for the pack's default retention period.

    In the pack

  22. Outcome

    Handover rebuilt: keep it and review at days 30, 60 and 90

    Even a complete rebuild is a record of what was believed and what you saw, as at a date. Keep it with the interview records, the decision-rights arrangement and the plan. Review it at day 30, day 60 and day 90, as the checklist asks for the discovery findings and the plan.

    In the pack

Practical checklist

  1. Have each system owner remove the predecessor's accounts, rights, tokens and portal logins, and confirm against a fresh extract.
  2. List every open incident and reporting duty, and confirm in writing who holds each incident role and who deputises.
  3. Build each section of the handover document from records, and say who was asked for what the records do not show.
  4. Ask the predecessor short written questions only once Legal and HR have said how, and ask their manager, team and colleagues too.
  5. Confirm the key contacts by a call, and list each inherited promise as Noted, not committed, until you have checked it can be kept.
  6. Send each inherited exception or acceptance past review to the approver its band sets, to renew, change or close.
  7. Mark each empty section None with a date and a named person where allowed, or Missing or Partial with who was asked.
  8. Count the sections complete and the gaps by kind, and carry each gap into the 100-day plan.

Evidence to have ready

  • The fresh extract taken after the predecessor's access was removed.
  • The written confirmation of who holds each incident role and deputises, with the list of open incidents and reporting duties.
  • The rebuilt handover document, with each section's source, each None with its date and name, and each gap with who was asked.
  • The decision on each inherited exception or risk acceptance, by the approver its band sets.

Assumptions

  • You have taken the role, or are about to, and you have read access to the registers, the incident log and the identity system.
  • The deadlines and counts shown are the defaults in the CISO Times first-90-days pack. Your own standard or contract may set different ones.
  • Whether your predecessor may be asked for help depends on their contract and any agreement on leaving. HR and Legal confirm it.

Not covered here