Sebastian AvercombeChief Strategy Officer
Portrait of Sebastian Avercombe

The journey so far

Sebastian Avercombe

Chief Strategy Officer · Canada

A strategic choice should change what the bank is prepared to leave undone.

I work on the decisions that separate a bank’s attractive possibilities from the commitments it is prepared to make. My interest is in the alternative deferred, the assumption corrected and the responsibility that continues after a change in direction. A strategic account should make those consequences understandable to people who have to carry them out. This fictional career follows advisory work into business planning and a Canadian bank’s strategy function, with the mistakes and costs retained alongside the decisions.

At Westravell Bank I lead forty-two strategy colleagues through five direct reports. My delegated operating expense is C$11.2 million for 2026. The company’s C$22 billion in 2025 balance-sheet assets describes the bank, not a portfolio under my personal control. Lending, risk, capital and customer obligations have their responsible authorities. The strategy function helps the institution examine choices across them without treating coordination as permission to override those boundaries.

The cases concern a staged regional expansion, overlapping relationships in an acquisition proposal, the management capacity behind nine initiatives, an overstated signal of customer interest and a segment exit with continuing account responsibilities. Each account identifies the disagreement and what the response cost. They are invented examples of the material a CSO could prepare for a substantive leadership website. The aim is to make judgement open to examination, including where the original interpretation was my own.

Two regional commitments before two more

A 2023 proposal would have established four regional business-service teams. I recommended starting with two while the other two awaited recruitment and servicing evidence. C$2.8 million in additional assessment and staged mobilisation expense remained visible. The decision gave up the proposed simultaneous reach; the eventual return from the first two regions remained uncertain.

A relationship count overstated the acquisition’s new reach

In 2015, 112 of 180 relationships in an advisory-business proposal already matched the bank’s customer base. I opposed presenting the whole count as incremental reach. We did not complete the transaction and retained C$740, 000 in diligence expense. The remaining sixty-eight were neither proven conversions nor a substitute for an assessment of value.

Stopping expansion left existing responsibilities in place

The 2025 decision to stop pursuing new business in a selected segment left 4500 existing accounts requiring support under their actual arrangements. A two-year operating plan retained C$3.2 million for support and transition. That was an expense plan, not an accounting provision or a charge imposed on those customers.

Current focus

I am examining whether the work following a strategic decision reflects the choice that was recorded. Deferred expansion needs a basis for reconsideration; an exit needs an account of continuing responsibilities. I want both discussed without converting a plan into an entitlement to change customer arrangements or bypass the people responsible for professional judgement. The evidence should show where the strategy function contributed and where another authority made the decision.

Conversations I welcome

I would consider a strategy conversation or a first non-executive opportunity where experience of institutional choice complements the existing team. The fit would depend on the actual mandate, preparation, employer agreement and competing commitments. This demonstration has no real banking service or enquiry channel. An actual profile should identify an authorised way to approach its owner and publish only information that the leader has permission to share.

A strategic choice should change what the bank is prepared to leave undone.

I joined the fictional Aldermere Strategy Partners in August 1990, two months after completing economics at Veyford School of Economics.

Open to
  • Board appointments
  • Speaking invitations
  1. 42

    Strategy colleagues in my remit

    Five direct reports at October 2026 within a 1240-person company

  2. C$11.2 m

    Strategy-function operating expense

    2026 delegation; separate from credit, capital and bank investment authority

  3. 36

    Years from analysis to institutional choice

    Career began in August 1990; no statutory directorship claimed

The compass

I look for the consequence of a choice in the work the organisation stops adding. A plan can describe attractive opportunities without resolving which ones the bank can responsibly undertake. I want the excluded alternative, the continuing obligation and the cost of reconsidering an assumption to remain in the decision record. Otherwise agreement on a strategy can conceal disagreement about what happens next.

The route

Waypoints of a career.

  1. Waypoint 01 · 1990 — 1997

    Analyst

    Aldermere Strategy Partners

    Examined the assumptions inside business proposals as part of a six-person advisory project team.

  2. Waypoint 02 · 1997 — 2004

    Engagement Manager

    Aldermere Strategy Partners

    Led advisory delivery with a defined expense remit while client executives retained their investment and operating decisions.

  3. Waypoint 03 · 2004 — 2011

    Head of business planning

    Westravell Bank

    Moved from external recommendation to institutional planning and owned the correction of an overstated customer-interest signal.

  4. Waypoint 04 · 2011 — 2018

    Strategy Director

    Westravell Bank

    Developed the bank’s comparative strategic account, including the relationship-overlap challenge in an acquisition assessment.

  5. Waypoint 05 · 2018 — present

    Chief Strategy Officer

    Westravell Bank

    Lead a 42-person strategy function examining regional commitments, initiative sequencing and the responsibilities retained after a change of direction.

Expeditions

Into difficult terrain, and back with results.

01

Four regions on the map, two commitments the bank could support first

In 2023 I reviewed a proposal for four new regional business-service teams. The commercial argument was coherent: owner-managed companies in all four regions appeared relevant to the bank's proposition, and a simultaneous launch would make the expansion easier to present as a national step. The proposal nevertheless treated the availability of local management and servicing support as if it followed automatically from selecting the regions. I wanted those conditions examined before the bank converted the map into four undertakings. Graham Pellivale, our fictional regional-business director, supported the wider launch. He argued that postponement could allow other providers to establish relationships first and that a staggered approach would make the organisation repeat mobilisation work. I accepted both as genuine costs of restraint. The disagreement was not between ambition and caution in the abstract. It concerned whether an attractive opportunity was sufficient evidence that we could support four commitments at the same time, with the people and service arrangements the proposition required. I recommended that two teams proceed first and that the other two remain deferred until recruitment and servicing evidence justified reconsideration. The responsible executives made the operating and customer decisions; my function assembled the comparative account and challenged the assumption of simultaneous readiness. We retained C$2.8 million in additional assessment and staged mobilisation expense. I did not describe that expenditure as an efficiency saving or claim that the first two regions would necessarily produce the expected return. The decision gave up the proposed immediate reach across all four regions. It also required a better account of the two that had not proceeded. A deferred proposal could not simply disappear from attention and return later with the same unsupported assumptions. The record identified the conditions that would need fresh examination, while avoiding a public promise about a future launch date. Existing customer commitments continued on their own terms throughout the planning choice. I would use this case to explain the distinction between selecting a market and accepting a service undertaking. The bank did not need a strategy function to redraw an attractive map. It needed an account of what each additional commitment demanded and what the proposed sequence left undone. The outcome was a staged decision with its expense and opportunity cost visible, not evidence of a universally correct number of regions to enter.

02

The acquisition proposal counted relationships that the bank already had

A 2015 assessment concerned a proposed acquisition of an advisory business with 180 client relationships. The initial strategic narrative emphasised access to a larger business-customer population. That was plausible as a starting question, but the relationship count did not itself establish additional reach. Our comparison identified 112 relationships already represented in the bank's existing customer base. Sixty-eight were not matched in that exercise. The proposal needed to distinguish those groups before using the total to support its strategic rationale. The sponsoring team argued that overlap could strengthen relationships and create a deeper proposition for existing customers. I agreed that a repeated relationship was not necessarily worthless. My objection was to presenting the same relationship as incremental reach while also claiming a benefit from serving it more fully. Those were different arguments with different evidence. Neither could be settled by treating all 180 names as a single addition to the bank's addressable customer population. I recommended that the strategic case be reconsidered without the unsupported new-reach claim. The sixty-eight unmatched relationships were not assumed to become bank customers, and no conversion rate was invented to preserve the original attractiveness. Financial, legal, risk and transaction specialists retained their responsibilities. My role was to examine the reasoning about institutional fit and the choices available, not to determine a valuation or substitute a strategy opinion for diligence in those disciplines. We did not complete the proposed transaction. C$740, 000 in diligence expense remained a cost of reaching that conclusion. Some colleagues felt the expenditure made withdrawal harder to defend, particularly after the proposal had occupied management attention. I argued that the cost already incurred should be disclosed, but that disclosure did not make an unsupported rationale stronger. Continuing merely to avoid explaining the expense would have confused the record of the assessment with the merits of the decision still ahead. The lesson I retained was about the language of reach. Relationship overlap may matter positively, negatively or differently from the original proposition, but it has to be described on its own terms. I do not present the rejected transaction as a quantified loss avoided because that counterfactual was not established. The case shows a recommendation that changed after the evidence narrowed what we could responsibly claim, with the unused opportunity and the assessment cost left visible.

03

Nine initiatives competed for the same six accountable leaders

In 2021 the bank's strategic portfolio contained nine approved initiatives. Each had a rationale and a sponsor, and each could be explained individually. When we examined their combined demands, six accountable business leaders appeared repeatedly across the work. Approval of the nine proposals had not established that the same people could give each the judgement and attention assumed in its timetable. I asked for the portfolio to be considered as a set of competing organisational commitments rather than nine separate descriptions of merit. Several sponsors resisted a sequencing discussion. They had already obtained approval and believed a later start would weaken confidence in their programme. One argued that the appropriate response was to add programme support rather than revisit the order. Additional support could help organise work, but it would not necessarily provide the specific accountable judgement that the business leaders themselves had to exercise. I wanted the discussion to distinguish administrative capacity from decisions that could not simply be delegated to a larger project office. I recommended that six initiatives proceed while three move to a later sequence. That recommendation followed examination of dependencies and named responsibilities, not a formula limiting a leader to a fixed number of programmes. The relevant executives agreed the revised account. Specialist and risk obligations retained their authority; a strategy portfolio review did not make required work optional merely because its timetable was inconvenient. We retained C$1.6 million in programme replanning expense rather than presenting the change as a cost-free improvement in focus. The three deferred initiatives lost their original timing advantage. Their sponsors also needed to explain the change to colleagues who had already prepared for it. I considered that consequence part of the decision, not a communications problem to be concealed. Equally, proceeding with six did not prove that all delivery difficulties had been removed. The revised plan made a particular conflict in accountable attention more intelligible; it did not certify the execution of the remaining work. This case changed how I read a portfolio summary. A list can be complete while the organisation's account of what it has promised remains incomplete. The useful strategy contribution was to show where separately reasonable proposals competed for the same decisions and to support an explicit choice about sequence. The numbers describe this fictional situation only. They are not a staffing benchmark, an assurance of success or a reason to postpone an obligation owned by another authority.

04

I treated interest in a proposition as stronger evidence than it was

In 2008, while leading business planning, I supported a specialist business-service proposition using 240 expressions of interest. The responses suggested that the subject mattered to prospective users, and I allowed that interest to support a growth assumption beyond what the evidence established. I had not sufficiently distinguished willingness to discuss a problem from willingness to devote time to a defined next step. The mistake belonged in the strategic assessment I endorsed, rather than solely in the way a later team tried to execute it. A colleague challenged the interpretation after follow-up conversations produced a less uniform picture. Forty-six respondents were willing to enter a defined assessment. Seventy-four remained interested but could not allocate effort, while 120 represented general curiosity without a further commitment. Those three groups reconciled to the original 240. Even the forty-six had not become customers. Calling them conversions would have repeated the earlier error with a smaller number and a more persuasive-looking qualification. The proposition's advocates argued that early interest was always imperfect and that requiring firmer evidence could delay useful experimentation. I agreed that exploration did not need to begin with a completed customer commitment. The problem was the conclusion I had attached to exploratory evidence. We could justify further learning on one basis without claiming a growth expectation on another. The account needed to make that distinction explicit before it was used to support a wider institutional commitment. I withdrew the unsupported assumption and supported C$520, 000 in research and proposition rework. That was a real expense within the fictional case, not an estimated benefit from avoiding an imagined failure. The work could continue only on a revised basis that described what remained unknown. The credit, customer and professional decisions associated with any eventual service would retain their own authorities. A strategy research result did not constitute a banking offer or approval for an individual customer. I keep this example because it makes my own standard open to challenge. It is easy to ask another sponsor whether evidence supports a conclusion and harder to recognise the same gap in a proposal one has helped develop. The correction did not make expressions of interest useless. It restored their actual meaning and required me to explain the cost of having asked them to carry more weight than they could bear.

05

The bank stopped pursuing the segment while continuing to serve its accounts

In 2025 we reviewed whether the bank should continue pursuing new business in a selected segment. The strategic assessment favoured ending that expansion effort, but the decision concerned more than future origination. There were 4500 existing accounts with continuing arrangements and service responsibilities. I wanted the recommendation to distinguish a change in where the bank sought growth from any separate decision affecting the customers already present. A segment label did not erase those relationships or determine their treatment. Some colleagues questioned why an exit proposal still carried material expenditure. They expected a clearer reduction in the bank's commitment once the strategic direction changed. Iona Brackenhurst, our fictional business-operations head, described the support the existing account population continued to require. I supported keeping that work inside the strategic account. If the decision looked attractive only after its continuing responsibilities had been removed from view, the comparison was incomplete rather than decisive. The two-year operating plan retained C$3.2 million for support and transition. This was planned operating expense, not an accounting provision, a customer charge or a claim about the cost of terminating arrangements. Contract, conduct, risk and customer authorities remained responsible for the actual obligations. My recommendation did not authorise account closure or allow the strategy function to replace the judgement of those owners. The growth decision and the handling of existing relationships had to remain connected without being treated as identical. The response gave up continued pursuit of new business in the segment while accepting that the institution's work there would continue. That could appear less dramatic than a clean exit announcement. It was also a more faithful description of the choice. The support plan needed review as circumstances developed, but it could not be dismissed simply because its cost complicated the headline. Nor should a continuing obligation become an excuse to avoid explaining whether the intended change in new-business activity had actually occurred. I would bring this case to a discussion about what it means for a strategy to stop something. The appropriate evidence depends on what is being stopped and what remains owed. A bank can change its future direction while retaining responsibilities from its previous choices. The leadership account should be able to hold both facts at once, with the authority and expense clear enough for others to examine. All institutions and outcomes in this case are fictional.

Terrain

Where I know the ground.

  • Evidence behind a banking growth proposition
  • Reach and overlap in strategic assessment
  • Management capacity across a strategy portfolio
  • Continuing obligations after a change in direction

Languages

Spoken along the way.

  • English
  • French

Fellow travellers

In their words.

Sebastian made us distinguish between leaving a growth segment and leaving the customers already in it. The continuing support cost became part of the choice rather than an inconvenient item outside it.
Iona BrackenhurstFictional business-operations head; counterpart in the 2025 segment review
I supported a wider launch. Sebastian kept the deferred regions in the account and asked what would have to be true before we could add them responsibly.
Graham PellivaleFictional regional-business director; colleague on the 2023 expansion proposal

Dispatches

Notes from the road.

An invitation

Contact

I would consider a strategy conversation or a first non-executive opportunity where experience of institutional choice complements the existing team. The fit would depend on the actual mandate, preparation, employer agreement and competing commitments. This demonstration has no real banking service or enquiry channel. An actual profile should identify an authorised way to approach its owner and publish only information that the leader has permission to share.

Open to
  • Board appointments
  • Speaking invitations

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