Sienna Alderwick

Sienna Alderwick · Chief Operating Officer · Australia

Thirty-seven years learning what the completion account leaves open.

I

Chief Operating Officer

Marlivane Properties

Jun 2019 — Present

Sector
Commercial-property ownership and occupied-building operation
Ownership
Family shareholding 70%; private institutional investor 30%
Company scale
A$268 million company property revenue in 2025; not asset value
Employees
260 company employees at October 2026
Geography
38 buildings: 27 in New South Wales and 11 in Queensland; Sydney headquarters
Reporting to
Chief Executive Officer Talia Cressvale
Team
170 operating colleagues; five direct reports at October 2026
Financial scope
A$68 million delegated 2026 operating expense; acquisitions, separate capital and tenants’ own costs excluded

Mandate

Bring recurring building experience, specialist assessment and the operating account into the same management discussion.

Outcomes

  • Funded A$310,000 investigation and coordination for a defined review of 420 closed non-urgent comfort requests.
  • Distinguished 52 supported recurrences from 31 different or unconfirmed same-location reports.
  • Coordinated a twelve-group condition review and separate capital proposals without claiming technical authority.

Decisions in context

The COO appointment widened my responsibility from a service portfolio to its relationship with the company’s asset choices. A closure report could be accurate as a record of action yet incomplete as an account of the building. I brought recurring occupier reports into the management discussion without assuming that every new contact proved the same fault. The condition review of twelve equipment groups required a similar distinction: operating attention could justify examination, but it could not supply the technical answer. I report to the CEO and lead the operating team through five direct reports. My delegated expense is separate from company revenue and capital approval. The contribution I would take into a next role is this ability to make a property account more examinable while retaining the limits of what its evidence establishes.

Reason for the move

Current appointment; a future transition would preserve the account of unresolved operating and asset questions.

II

Portfolio Operations Director

Marlivane Properties

Mar 2012 — May 2019

Sector
Occupied commercial-property operations
Ownership
Privately owned family and institutional investment business
Company scale
A$201 million company property revenue in 2018
Employees
212 company employees in 2018
Geography
32 Australian buildings in 2018
Reporting to
Chief Operating Officer
Team
132 operating colleagues; four direct reports in 2018
Financial scope
A$47 million annual operating expense in 2018; capital projects and tenant costs separate

Mandate

Coordinate property service across the portfolio as access requirements and occupier working patterns changed.

Outcomes

  • Separated 68 performed routine visits from 28 unperformed visits in a 96-visit review.
  • Recorded A$84,000 additional coordination and repeat-visit expense.
  • Obtained approval for A$240,000 annual incremental expense supporting selected evening services in four buildings.

Decisions in context

This role required me to explain the operating conditions behind a portfolio promise. In the routine-visit review, a booking had been allowed to imply confirmed access and contractor availability even when one condition was absent. The later evening-service decision exposed another difference: people could have access to a property without every supporting service being available on the same hours. I worked with the relevant colleagues to make these arrangements explicit and secure an accountable cost decision. Neither case supplied a universal rule about hours or access. Each required attention to the actual building and the responsible parties. Director was my functional management title, not evidence of statutory board service. The appointment prepared me for the wider COO remit by connecting day-to-day property coordination with the commercial expectations management was creating.

Reason for the move

Appointed COO after seven years of portfolio operating responsibility.

III

Regional Building Operations Manager

Marlivane Properties

Sept 2004 — Feb 2012

Sector
Commercial-building operation
Ownership
Privately held property company
Company scale
A$124 million company property revenue in 2011
Employees
154 company employees in 2011
Geography
22 company buildings; my regional remit covered eight
Reporting to
Portfolio Operations Director
Team
52 operating colleagues; three direct reports in 2011
Financial scope
A$16 million annual regional operating expense in 2011; investment and capital approvals excluded

Mandate

Coordinate occupied-building services across an eight-property region.

Outcomes

  • Accepted responsibility for an area-led cleaning reduction that misunderstood continuing common-space use.
  • Restored part of the scope with A$72,000 additional expense over six months.
  • Changed the evidence required for service-scope recommendations to include actual use and task conditions.

Decisions in context

Joining Marlivane expanded my view from three facilities to a region. The larger account made percentages attractive shortcuts, and I used one too readily when occupied area fell in four buildings. The cleaning correction was a substantial learning point because the original proposal had appeared commercially reasonable. A property colleague had warned that common spaces would remain busy, and I had not given that account enough weight. I learned to ask where the work had actually changed before translating vacancy into a lower service scope. The additional six-month expense was retained separately from the proposed annual reduction. I also became more willing to return to management with an explicit correction. The role developed judgement through an error I owned, rather than through a claim that broader responsibility automatically produced better decisions.

Reason for the move

Promoted to portfolio operations director with responsibility across the company’s buildings.

IV

Facilities Manager

Verrenshore Estates

Jul 1996 — Aug 2004

Sector
Commercial-property services
Ownership
Privately owned property business
Company scale
A$51 million company property revenue in 2003
Employees
86 company employees in 2003
Geography
Twelve company buildings; my remit covered three
Reporting to
Head of Property Operations
Team
18 colleagues across three buildings; two direct reports in 2003
Financial scope
A$3.6 million annual operating expense in 2003; no acquisition or capital authority

Mandate

Organise routine building services and coordinate occupier, contractor and specialist responsibilities.

Outcomes

  • Made outstanding access arrangements visible before treating a routine visit as ready.
  • Distinguished a reported symptom from the technical diagnosis needed to choose a response.
  • Developed a building-level account of service work that retained unanswered occupier questions.

Decisions in context

The facilities appointment placed me closer to the consequences of our arrangements. I could no longer judge a request only by whether the next administrative action had occurred. A contractor might attend without the required access, or a reported comfort problem might need a different specialist to understand it. I learned to organise the conversation without pretending that coordination made me the technical decision-maker. My expense delegation covered routine operation of three buildings; capital and acquisition choices remained elsewhere. The company context grew during this period, but its revenue was never my personal budget. This role established the habit of asking what the user or receiving colleague still needed after the scheduled task. It also prepared me to work through two direct reports while retaining enough contact with the buildings to question an overly simple service account.

Reason for the move

Joined Marlivane to take regional responsibility across a larger property portfolio.

V

Property-Services Assistant

Verrenshore Estates

Jan 1989 — Jun 1996

Sector
Administrative coordination for commercial-property services
Ownership
Privately owned property company
Company scale
A$24 million company property revenue in 1995
Employees
42 company employees in 1995
Geography
Seven Australian commercial buildings
Reporting to
Facilities Manager
Team
Six-person service coordination team; no direct reports
Financial scope
No independent expense delegation, capital authority or technical sign-off

Mandate

Record routine service requests, organise information and follow up agreed next actions.

Outcomes

  • Kept the next action and responsible colleague visible for assigned service requests.
  • Learned to refer technical questions instead of treating every report as an administrative instruction.
  • Recognised that closing a task did not necessarily settle the occupier’s underlying concern.

Decisions in context

I joined after completing my business degree in November 1988. My early work was practical and supervised: record a request, find the relevant colleague and follow an agreed action through the organisation. I did not approve building work independently or manage a budget. Some requests returned after an earlier task had been marked complete, and I began to notice how little the record alone could explain about the user’s experience. I learned to preserve the question rather than assume another person’s completion meant the matter was settled. The six-person team gave me close exposure to the everyday coordination that supports a property, but it was not an enterprise leadership position. I describe its scale plainly because the later career makes more sense when the starting responsibility is accurate and the changes in authority can be followed.

Reason for the move

Promoted to facilities manager after seven years of service-coordination experience.

What I am looking for next

I would consider a property operating appointment where the owner wants to examine how its buildings are experienced between formal asset decisions. The starting conversation should cover the actual portfolio, the responsibilities already held by technical and commercial colleagues, and the evidence management currently uses to judge service. I would want authority to make the operating account clearer, including the expense of investigation and the consequences of revising an earlier decision. I would not offer a universal maintenance formula or promise that a different reporting method would remove every fault. A first non-executive role could also be appropriate where practical experience of occupied assets would improve the questions asked of management. That would require employer agreement, conflict assessment and further governance preparation. The proposed contribution would be to help a board examine assumptions and continuing obligations, not to direct a building team from the boardroom. In either setting, I would want the next chapter to preserve what the previous one still needs to explain.