A family office is not a static organisation. It evolves with the family's wealth, the complexity of the mandate, and the principal's appetite for structure. The team that serves a family with £50 million looks nothing like the team that serves a family with £1 billion. The hires that matter, the reporting lines, and the way the office interacts with external advisers all change as the office grows.
Most public writing about family office structure is generic. It describes the functions (investments, operations, legal, philanthropy) without saying who does them at each stage. The practical question for a principal or a founding Family Office Director is different: given our current scale, what is the right team today, and what is the first hire we make next?
This guide answers that question across four stages of wealth and complexity. Ranges are illustrative rather than prescriptive. Every family is different, and the structure should follow the mandate, not the wealth band. For current opportunities across each structure, see our Family Office recruitment page.
At this level, a single family office is rarely justified. The running costs of a dedicated team exceed what the family saves on external adviser fees. Most families in this band operate what is increasingly called a virtual family office: a lean structure that coordinates external advisers rather than employing a full in-house team.
Typical team:
A Chief of Staff, senior PA, or a Family Office Director on a part-time basis. This person owns the principal's coordination with lawyers, accountants, investment managers, and administrative infrastructure.
An external investment manager or multi family office handling investment strategy.
External accountants and tax advisers handling compliance and reporting.
External legal counsel retained on specific matters.
In some cases, a part-time bookkeeper or financial administrator coordinating day-to-day cash management.
Common first hire: A Chief of Staff or senior PA. Sometimes a Family Office Assistant who grows with the office. For principals coming into the range after a liquidity event, the first hire is often someone who was close to them during the business, moved across with them, and takes on coordination.
What usually goes wrong: Principals in this band often want the elegance of a dedicated office without the cost. They hire one administrator and pile every function onto them. The person breaks within eighteen months. The lesson is that at this scale, structure matters more than staffing. A well-coordinated adviser network with one senior internal person is usually better than three junior in-house hires.
This is where a dedicated single family office starts to make sense. The complexity has grown beyond what a single coordinator can handle, and the savings on adviser fees (plus the benefit of bespoke service) justify dedicated hires.
Typical team:
Family Office Director or Manager. Runs the office. Owns operations, adviser coordination, and staff.
Senior EA or Chief of Staff to the principal. Owns the principal's diary, correspondence, travel, and often family coordination. In this band, a single senior person often covers both EA and CoS functions.
Finance or accounting lead. Either in-house or retained on a consultancy basis. Owns reporting, cash management, and tax coordination. Frequently the first internal hire after the Director.
Investment Analyst or Portfolio Manager. For families running capital in-house. Often supported by external managers at this stage rather than running fully in-house strategies.
Household and estate coordination. Usually managed through the Director or EA rather than a dedicated role.
Common first hire when moving into this band: The Family Office Director, if one is not already in place. Without a Director, the office fragments and the principal becomes the bottleneck.
If nobody can explain who owns what, the best person you hire will spend their first six months in meetings that should have happened before they arrived. This is the most common failure in offices moving through this stage. The hires are strong individually. The structure is absent. Structure first, hire second.
At this level, the office is a proper operation. Staff counts typically sit at eight to twenty. The family has multiple entities, international residences, an active investment portfolio, and often philanthropic or operating commercial interests.
Typical team:
Family Office Director or CEO. Runs the office and owns the principal relationship alongside the Chief of Staff.
Chief of Staff to the principal. Separate from the Director. Owns the principal's decisions, advisers, and family coordination.
CFO or Finance Director. Leads financial reporting, treasury, tax coordination, and entity management.
CIO. In-house investment leadership for families running significant capital internally. Supported by a Portfolio Manager and Analyst.
Director of Operations or Head of Administration. Owns the back-office: HR, IT, facilities, processes, compliance.
Executive Assistants and Family Office Assistants. A small team supporting the senior hires.
Legal counsel. Either in-house or retained specialist counsel with clear scope.
Head of Household or Estate Manager. Often reports into the Family Office Director, coordinating household and property staff across residences.
At this stage, the distinction between the Director and the Chief of Staff matters. The Director runs the office as a business. The CoS runs the principal's decisions. In smaller offices they are the same person. At this scale, combining the two roles creates bottlenecks and drives turnover.
The strongest operators we have placed barely register in the first week. By week four, everyone wonders how the office ran without them. This is the signature of a good senior hire at this stage: quiet, absorbent, and quickly indispensable.
At the top end, the family office is an institutional operation with layered teams. Staff counts can run from twenty to seventy-five and occasionally higher. The office may have offices in multiple jurisdictions, a dedicated philanthropic vehicle, and investment teams structured along asset-class lines.
Typical team:
Family Office CEO or President. Often a former senior institutional executive. Owns the whole operation and reports to a family board.
Chief of Staff or Principal's Office. The principal's own team, separate from the office CEO's team. Handles the principal's strategic decisions and family governance.
CIO. Often supported by a full investment team: Head of Public Markets, Head of Private Equity, Head of Real Estate, Head of Venture. Each head may have an analyst team of two to five.
CFO. With a finance team covering reporting, tax, treasury, and entity management.
General Counsel. In-house legal with external counsel for specialist matters.
Head of Family Governance or Family Office Director. Owns next-generation education, family meetings, and governance infrastructure.
Head of Philanthropy. Runs the foundation or donor-advised structure.
Head of Property and Estates. Oversees residences, yachts, aviation, and ground staff.
Head of HR and People. Manages the growing team, talent development, and succession.
IT and Information Security. In-house specialists given the sensitivity of the data.
Ambiguity does not feel expensive until you count the meetings that exist only because nobody wrote down who owns what. Institutional-scale offices run on documented authority. Role definitions, approval thresholds, and decision rights are written down. Offices that grow into this band without documenting these structures experience a sharp productivity drop and high senior turnover.
Three transitions define how family office teams evolve.
From external to internal. At lower stages, most functions are external. As the office grows, key functions come in-house, starting with Director-level coordination, then finance, then investment, then operations and legal. The sequencing matters. Bringing functions in-house too early creates cost without benefit. Too late, and the external advisers have accumulated too much institutional knowledge for the in-house team to displace.
From generalist to specialist. Early stage teams are made of generalists who cover multiple functions. A Chief of Staff who handles finance. An EA who handles HR. As the office grows, functions split into specialist heads, and the generalists become leaders of specialist teams rather than doers across multiple disciplines.
From informal to structured. Early stage offices run on trust and direct contact with the principal. Mature offices run on documented processes, approval matrices, and formal governance. The transition is hard. Some senior hires who thrived in the informal stage do not survive the structuring stage, and some who joined at the structured stage cannot adapt if the office shrinks again.
Stage one: Hiring a junior administrator and expecting them to run the office. The first hire needs the seniority to coordinate external advisers, not execute tasks for the principal.
Stage two: Hiring a Director before the principal has decided what the office is for. A Director without a mandate spends their first year building structure around ambiguous goals and leaves when the structure does not match the principal's actual intent.
Stage three: Combining the Family Office Director and Chief of Staff roles. At this scale, the two jobs are different. Combining them produces a senior hire who cannot do either well.
Stage four: Under-investing in HR, operations, and governance. Institutional-scale offices run on structure. Families who resist the structure find themselves rebuilding after a senior departure, an audit, or a family conflict.
Oplu recruits across all four stages. Our scoping conversation with clients often starts with the team structure, not the hire. Before we agree who to recruit, we agree what the team should look like today and in eighteen months. Many of our most valuable contributions happen before the search begins, in conversations that help principals and family office directors see the structure they actually need.
For founding hires, we work alongside the principal and their most senior adviser. For scale-up hires, we work with the Family Office Director to identify the right sequence of hires. For institutional-stage offices, we work with the HR and senior leadership team to structure specialist seats.
For current opportunities across all stages, see our job board. To discuss a family office search, get in touch.
A family office team structure is the combination of roles, reporting lines, and external adviser relationships that deliver the family's financial, operational, and personal mandate. Typical roles include Family Office Director, Chief of Staff, CFO, CIO, Executive Assistant, and specialist support. The structure evolves as the family's wealth and complexity grow.
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