Chief Technology Officer (CTO): The Role, Responsibilities and How to Hire One

The chief technology officer is one of the most important appointments a growing business makes. It is also one of the least consistently defined. Two companies can advertise the same CTO title and mean two very different jobs. One needs a leader to design and build the first version of its product. The other needs a leader to run an engineering organisation of several hundred people, manage a large technology budget and explain technology risk to a board.

The confusion is not new. In 2002, Tom Berray and Raj Sampath published a study of the role based on discussions with hundreds of CIOs and CTOs. They argued that the CTO was among the least understood of all C-level positions. That observation still holds, and it explains why so many CTO appointments disappoint. When a business is unclear about which kind of CTO it needs, it tends to appoint the most impressive candidate rather than the right one.

This guide explains what a CTO is in business, what a chief technology officer does at each stage of growth, how the role differs from the CIO and the chief product officer, and how to hire one. It draws on published research and on twenty years of appointing technology leaders into organisations in growth or transformation.

What is a CTO in business?

CTO stands for chief technology officer. In business, the CTO is the senior executive responsible for an organisation's technology strategy and for the people, systems and architecture that deliver it. The UK government's Digital, Data and Technology Capability Framework describes the chief technology officer as "the organisation's technology strategist", someone who makes "decisions about the technical direction of the organisation and work[s] closely with other senior leaders".

In most organisations the CTO reports to the CEO and sits on the executive committee. In technology companies the CTO is often a co-founder and sometimes a board director. In larger groups, a CTO may lead the technology for one division or platform and report to a group CIO.

What does a chief technology officer do?

A chief technology officer decides how technology will help the organisation meet its commercial goals, and then makes sure the organisation can build and run that technology reliably. What a CTO does from day to day depends on two things: the type of CTO role the business has created, and the stage of growth the business has reached.

Four types of CTO role

Berray and Sampath's research, which combined those discussions with a written survey of around 30 CTOs, identified four common models of the role. They remain a useful way to describe what a business actually needs.

• The infrastructure manager. Runs the technology operation: data centres and cloud infrastructure, networks, application development and maintenance, and security. This CTO keeps the technology estate working efficiently and often reports to a CIO.
• The big thinker. Assesses how technology could create new business models, new sources of revenue or new competitive threats. This CTO usually has a small team, works mainly through influence and advises the CEO and executive committee.
• The technology visionary and operations manager. Found mainly in companies where technology is the business strategy. This CTO decides how technology will deliver the strategy and then builds and runs the organisation that does it. Many founding CTOs fit this model.
• The external-facing technologist. Uses technology to improve the products and services customers receive, and often represents the company's technology to clients, partners and the wider market.

Most CTO roles today combine two of these models. A common mistake is to write a brief for one model and appoint a leader whose experience lies in another. The original study warned about one version of this in particular: chief executives appointing CTOs with a clear vision but no real experience of creating and running a technology organisation.

CTO role by company stage: start-up, scale-up and enterprise

The same title also describes different work at different stages of growth.

• Start-ups. The CTO is usually the most senior engineer. They choose the first technologies, write much of the early code, hire the first engineers and make most technical decisions personally.
• Scale-ups. The CTO moves from building the product to building the engineering organisation. The work shifts to hiring and developing engineering managers, introducing delivery processes, preparing the architecture for more customers and higher volumes, and meeting the security and compliance expectations of larger clients and investors.
• Established and listed organisations. The CTO sets technology strategy across several products or business units, manages a large budget and a network of suppliers, oversees technology risk and leads transformation programmes. A large part of the role is spent with the executive committee and the board.

Each stage calls for different experience. A CTO who was excellent at the first stage will not automatically succeed at the third, and the reverse is equally true. One of the most useful questions a board can ask about a candidate is whether they have already led a technology organisation through the stage the business is about to enter.

CTO responsibilities: the core duties of a chief technology officer

The emphasis varies between organisations, but the duties of a CTO usually fall into seven areas.

Technology strategy and architecture

The CTO sets the technology strategy and makes sure it supports the business strategy rather than running separately from it. This includes the target architecture, the main technology choices, and decisions about what to build, what to buy and what to retire. A good technology strategy is short enough for the executive committee to understand and specific enough for engineering teams to act on.

Building and leading the engineering organisation

The CTO is responsible for the structure, leadership and performance of the engineering function. This covers hiring senior engineering leaders, setting standards for how teams work, developing the next level of management, and keeping the size and cost of the function in proportion to what it delivers.

Product delivery

In product companies, the CTO shares responsibility for delivery with the product leader. The product leader decides what customers need and in what order. The CTO makes sure the organisation can build it to the required quality and at a predictable pace. Where the division between the two is unclear, delivery slows and the roles come into conflict. We return to this later in the guide.

Security, resilience and technology risk

Cyber risk is now a regular item on most board agendas, and the CTO is usually accountable for its technical side. The UK government's Cyber Security Breaches Survey 2025/26 found that 43 per cent of UK businesses identified a cyber breach or attack in the previous twelve months. The figure rose to 65 per cent of medium businesses and 69 per cent of large ones. The CTO, often working with a chief information security officer, is expected to reduce that exposure, keep services available and explain the remaining risk to the board in plain terms.

Technical debt and technology investment

Technical debt is the accumulated cost of past shortcuts and ageing systems that now slow down new work. It is one of the least visible parts of a CTO's job and one of the most expensive. In a 2020 McKinsey survey of 50 CIOs at large financial services and technology companies, CIOs estimated that technical debt amounted to 20 to 40 per cent of the value of their entire technology estate before depreciation. They also reported that 10 to 20 per cent of the technology budget intended for new products was being diverted to resolving it. The CTO has to decide how much of each year's investment goes into new capability and how much into reducing that debt, and must be able to justify the balance to the finance director.

Board and executive communication

A CTO's influence depends on how clearly they can explain technology decisions to people who are not technologists, and there is evidence that technology understanding at board level affects performance. Research from the MIT Center for Information Systems Research, published in MIT Sloan Management Review in 2019, analysed the biographies of 40,000 directors of US-listed companies. Companies with three or more digitally savvy directors outperformed other companies, with 38 per cent higher revenue growth, 34 per cent higher return on assets and 34 per cent higher growth in market capitalisation. The CTO is often the person who builds that understanding at the top of the organisation.

AI strategy and governance

Artificial intelligence has added a further responsibility to the role. The CTO is usually expected to decide where AI belongs in the product and in internal operations, which models and suppliers to use, how company data is prepared and protected, and how AI systems are tested and monitored once they are live.

The role is also changing around the CTO. The IBM Institute for Business Value's 2026 CEO Study, a survey of 2,000 CEOs across 33 countries, found that 76 per cent of organisations now have a chief AI officer, up from 26 per cent in 2025. The same study found that 85 per cent of respondents believe all functional leaders must become technology experts in their own area. Where a business appoints a chief AI officer, the boundary with the CTO should be agreed at the outset. A common arrangement is for the chief AI officer to set priorities for how AI is used across the business, while the CTO remains accountable for the architecture, data and engineering that AI depends on. We have written separately about why AI investment so often fails to produce a return when the boardroom lacks product thinking.

CTO vs CIO: what is the difference?

The chief technology officer and the chief information officer are the two roles most often confused. Both are senior technology leaders, and in smaller organisations one person often covers both. The difference lies in where each role directs its attention.

• The CIO is responsible for the technology the organisation uses to run itself: enterprise systems, internal IT services, business data and reporting, and the efficiency of internal processes. The CIO's users are mainly colleagues.
• The CTO is responsible for the technology the organisation sells or uses to serve its customers: the product, the platform it runs on, the engineering teams that build it and the long-term technical direction. The CTO's users are mainly customers.

Where both roles exist, reporting lines vary. In a traditional enterprise, the CTO may report to the CIO and concentrate on infrastructure and engineering. In a technology company the arrangement is often reversed, with a CIO or head of IT reporting to the CTO. What matters is that the division of responsibility is written down. When two senior leaders each believe they own the technology strategy, the executive committee receives two different answers to the same question, which is why many companies have combined the roles so that there is an apex accountable technology leader.

CTO vs chief product officer (CPO)

In product companies, the more important boundary is often between the CTO and the chief product officer. The CPO is responsible for what the business builds and why: understanding customer problems, setting product strategy and deciding priorities. The CTO is responsible for how it is built: architecture, engineering quality, delivery and reliability.

Problems appear when one role expands to cover a gap left by the other. Without a strong product leader, engineering teams tend to build whatever the sales team has most recently promised a customer, and the product becomes a collection of individual requests. Without the CTO's involvement in product decisions, the business commits to plans its technology cannot support. A business that wants to become product-led usually needs both roles clearly defined, and a working relationship between the two leaders that has been tested before either is appointed. Again, it is not uncommon for a business to appoint a chief product and technology officer (CPTO), so that there is clear accountability and an escalation path for prioritisation and disagreement.

CTO vs head of engineering

A head of engineering, sometimes called a VP of engineering, runs the engineering teams from day to day: delivery, team structure, performance and engineering practice. The CTO sets technical direction and represents technology at executive level. In many scale-ups, the first senior technology hire is really a head of engineering, and the CTO title is added later. Choosing the right title at the start avoids a difficult conversation when the business later needs both roles.

When to hire a CTO: signs your business needs one

Not every business needs a chief technology officer. If technology supports the business but is not what it sells, a CIO or an experienced head of IT may be the better appointment. A CTO becomes necessary when several of the following are true:

• Technology is part of the product, or the main way the business serves its customers.
• Technical decisions now carry commercial, regulatory or security consequences that the board needs to understand.
• The founders can no longer make every technical decision themselves without slowing the business down.
• Engineering delivery has become unpredictable, and no one below the CEO is accountable for improving it.
• Investors or major customers are asking questions about architecture, security or scalability that no one in the leadership team can answer with authority.
• The business is planning a major change, such as a move to a new platform, a shift from bespoke client projects to a single product, or a large AI programme.

How to hire a CTO: a step-by-step guide

The process below reflects how we approach technology leadership appointments. It applies whether you use a search firm or run the process yourself.

Step 1: define the problem the CTO needs to solve

Start with the problem, not the job title. Ask what will be different in two years if this appointment succeeds. "We need a CTO" is not a brief. "We need to move from bespoke client projects to a single product within 24 months without losing our largest customers" is a brief. The answer determines which type of CTO you need, what experience matters and which candidates are worth considering.

Step 2: decide which kind of CTO you are hiring

Use the problem to decide which of the four types of CTO role, and which stage of growth, the appointment reflects. Be specific about whether the CTO will lead delivery personally, lead through other engineering leaders or mainly advise. Many unsuccessful appointments can be traced back to a mismatch at this step.

Step 3: write a CTO job description based on outcomes

A CTO job description should set out what the leader must achieve, not only what they must know. A useful CTO job specification covers:

• The purpose of the role and the problem it exists to solve.
• The outcomes expected at twelve and twenty-four months.
• The scope: team size, budget, products and systems.
• The reporting line and the executives the CTO will work with most closely.
• The experience that is essential, and the experience that can be learned or provided by others in the team.

Avoid long lists of programming languages and tools. At this level they rarely separate strong candidates from weak ones, and they discourage capable leaders who have solved the same problems with different technologies.

Step 4: search the whole market, including outside your sector

The strongest CTO candidates are usually in post, performing well and not looking for a new role. They are unlikely to see a job advertisement or to respond to a contingent recruitment approach. This is why most appointments at this level are made through technology executive search, in which the market is mapped and candidates are approached directly and in confidence.

It is also worth looking beyond your own industry. A CTO who has already moved a business from bespoke projects to a product in another sector will often have more relevant experience than one who has spent a career with your direct competitors. Sector knowledge can be learned in months. Experience of leading the specific change you need is much harder to acquire.

Step 5: assess behaviour under pressure as well as technical depth

Most CTO candidates who reach a shortlist are technically credible. What separates them is how they behave when conditions become difficult: when a major release fails, when the board loses patience, or when two senior engineers resign in the same month. Working with the social psychologist Dr Ian Stewart, we assess senior leaders against four behavioural schemas. These are patterns of assumption that describe how a leader operates when things are calm and predict what they tend to do under pressure. They are tendencies a leader can recognise and manage, not fixed traits. One pattern that is particularly relevant to technology leaders is the Architect who keeps refining the plan when the business needs a decision.

It is equally important to test whether a candidate has built what you need or has only worked inside it. Knowing what good looks like inside a successful technology organisation is not the same as having created one.

Step 6: test the working relationships the CTO will depend on

A CTO's success depends heavily on their working relationships with the CEO, the product leader and the finance director. Before making an offer, arrange detailed conversations between the preferred candidate and each of them, focused on real decisions the business faces. It is better to discover a disagreement about priorities before the appointment than six months after it.

Step 7: plan the first 90 days

An appointment is not complete when the offer is accepted. McKinsey research by Scott Keller and Mary Meaney found that between 27 and 46 per cent of executive transitions are regarded as failures or disappointments two years later. The same research found that nine out of ten teams whose leader made a successful transition went on to meet their three-year performance goals. Agree the CTO's early priorities, introduce them to the people they need to know, and give them an honest account of the technical and organisational problems they are inheriting.

CTO interview questions worth asking

Competency questions such as "tell me about a time you failed" tend to produce rehearsed answers at this level. Conversational questions about real decisions reveal far more. Questions we find useful include:

• What state were the technology and the team in when you joined your current organisation, and what did you change first?
• Which of your achievements did you start yourself, and which did you inherit and continue?
• How do you decide what to build, what to buy and what to stop?
• How would you explain our largest technology risk to a board with no technical background?
• When you and the product leader disagree on priorities, how is the decision made?
• What would your engineering organisation need to look like to support twice the current number of customers?
• We have talked about what went well. What did not go to plan, and what would you do differently now?

The last question is a deliberate alternative to the conventional question about failure. We explain the reasoning in why we do not ask senior candidates about their failures.

CTO hiring mistakes to avoid

• Appointing the best engineer instead of a leader. Technical excellence is necessary but not sufficient. A CTO's main output is decisions and an effective organisation, not code.
• Hiring for the company you are today. A CTO appointment should reflect where the business expects to be in two to three years.
• Confusing experience of success with experience of building. A candidate from a very successful technology company may never have had to create the practices they now take for granted.
• Searching only within your sector. This narrows the field and often excludes the candidates with the most relevant experience of change.
• Leaving the boundaries with other roles undefined. Unclear lines between the CTO, CIO, CPO and chief AI officer lead to duplicated work and slow decisions.
• Rushing the appointment. A vacancy creates pressure to decide quickly. The cost of a rushed senior hire is usually far higher than the cost of a few more weeks of search.

Choosing the right chief technology officer

The chief technology officer role will continue to change as AI, security and regulation place new demands on it. The principles behind a good appointment stay the same. Define the problem first, decide which kind of CTO that problem requires, and then assess candidates against it, including how they behave when the work becomes difficult.

Before your next technology leadership appointment, it is worth asking one question of the brief. Does it describe a leader who has already built what your business needs, or one who would simply recognise it?

If you are planning a CTO appointment, we would welcome a confidential conversation.