John Ternus facts for kids

Quick facts for kids John Ternus
Ternus in 2026
Born	John Patrick Ternus May 1975 (age 51) California, U.S.
Education	University of Pennsylvania (BSE)
Title	Chief executive officer of Apple (2026–present) Senior Vice President of Hardware Engineering of Apple (2021–2026) Vice President of Hardware Engineering of Apple (2013–2021)
Predecessor	Tim Cook

John Patrick Ternus is an American mechanical engineer and business executive. He is the chief executive officer (CEO) of Apple, one of the largest technology companies in the world. Before becoming CEO, he served as the company's head of hardware engineering. He led teams that built famous devices like the iPhone, iPad, Mac computers, and AirPods.

Ternus joined Apple in 2001. Over the years, he earned a reputation as a creative problem-solver and a calm leader. He focuses on building computers that are powerful, easy to use, and friendly to the environment.

Early life and education of John Ternus

John Ternus was born in California in May 1975. Growing up on the west coast of the United States, he showed an early interest in how machines work and how things are built.

School years and athletic interests

As a young student, Ternus enjoyed science, mathematics, and building physical objects. He was also a dedicated athlete. He practiced competitive swimming, which taught him discipline, focus, and teamwork.

Studying mechanical engineering at the University of Pennsylvania

After high school, Ternus attended the University of Pennsylvania, an Ivy League university in Philadelphia. He decided to study mechanical engineering, which is the branch of engineering that designs physical machines and moving parts.

While at university, he joined the men's varsity swimming team. Balancing hard engineering classes with daily swimming practices helped him develop strong time-management skills.

Senior design project: Assistive technology

During his final year at university, Ternus worked on a special engineering project to help people with physical disabilities. He designed a mechanical feeding arm.

This robotic device was created for individuals who could not use their arms or legs. Users could operate the robotic arm using simple head movements to eat meals on their own. This project showed his passion for using technology to make life better for people who face physical challenges. In 1997, he graduated with a Bachelor of Science degree in Engineering.

Early engineering career and virtual reality

After graduating from college in 1997, Ternus began working as a professional mechanical engineer.

Working on early virtual reality headsets

His first major job was at a company named Virtual Research Systems. At this company, Ternus helped design early virtual reality (VR) headsets.

During the late 1990s, virtual reality was very new. Headsets were heavy, bulky, and difficult to make comfortable. Ternus spent his days solving tricky mechanical problems:

• Making screens fit closely in front of human eyes.
• Balancing the weight of the headset so it did not hurt the user's neck.
• Designing lightweight plastic frames that would stay durable over time.

This early work gave him deep experience in combining small computer parts into wearable designs.

Journey at Apple: Engineering to leadership

In 2001, Apple was a growing computer company looking for talented engineers. Ternus applied for a job and joined Apple's product design team.

Designing external computer monitors

When Ternus arrived at Apple, one of his first big assignments was working on the Apple Cinema Display. These were widescreen computer monitors made for creative artists, video editors, and photographers.

Ternus helped build thin aluminum frames and smooth hinges that allowed users to adjust the screen angle with a light touch. His success on these displays opened the door to bigger projects.

Rising through the engineering ranks

Over the next decade, Apple released revolutionary products like the iPhone and iPad. Ternus worked behind the scenes with large groups of engineers, designers, and programmers.

He became known for listening carefully to his team members and helping them fix hard engineering challenges. Because of his strong leadership, Apple promoted him to Vice President of Hardware Engineering in 2013 under engineering chief Dan Riccio.

Leading the iPad and Mac hardware teams

In his role as vice president, Ternus took charge of the physical hardware for several major product lines:

• The iPad line: He helped create the iPad Pro, designing ultra-thin cases, bright screens, and magnetic connectors for the Apple Pencil.
• AirPods wireless earbuds: He oversaw the mechanical layout of AirPods, packing batteries, microphones, and wireless antennas into tiny earbud shells.
• The Mac transition: He helped guide the transition of Mac computers from older chips to custom-designed Apple silicon chips, making laptops run faster while using less battery power.

Promotion to Senior Vice President in 2021

In 2021, Apple promoted Ternus to Senior Vice President of Hardware Engineering, placing him on the company's executive team. In this role, he reported directly to CEO Tim Cook.

Ternus became the youngest member of Apple's top management team. Reputable news organizations like Bloomberg News described him as charismatic, friendly, and well-liked by fellow engineers.

In late 2022, Apple also placed him in charge of engineering for the Apple Watch. Under his watch, Apple introduced thinner laptops like the MacBook Neo and lighter smartphones like the iPhone Air.

Becoming Chief Executive Officer of Apple

After leading Apple's hardware teams through many successful product launches, Ternus was chosen to lead the entire company as CEO.

What does a technology CEO do?

A chief executive officer makes major decisions for a business. For a technology giant like Apple, the CEO's responsibilities include:

• Setting the vision for future inventions and software updates.
• Leading thousands of employees across many countries.
• Managing relationships with suppliers who make glass, metal, and computer chips.
• Ensuring products are safe, secure, and respectful of user privacy.

Vision for artificial intelligence and innovation

As CEO, Ternus has focused heavily on artificial intelligence (AI) and helpful machine learning. He believes computers should assist users with daily tasks, such as writing notes, editing photos, and organizing schedules, without compromising private personal information.

He has also stated his desire to maintain the creative spirit started by Apple co-founder Steve Jobs, focusing on clean design, top build quality, and devices that feel magical to use.

How hardware engineering works

To understand John Ternus's background, it helps to learn what hardware engineers do every day.

The difference between hardware and software

Every digital device relies on two main parts working together:

• Hardware: The physical parts you can touch, such as the glass screen, aluminum frame, battery, circuit board, cameras, and buttons.
• Software: The digital code and programs you cannot touch, such as games, operating systems, apps, and web browsers.

Hardware engineers like Ternus design the physical shell and internal structure that protect the delicate electronics inside.

The steps of building a modern gadget

Creating a new smartphone or tablet takes years of careful planning and testing:

Concept and industrial design

Artists and designers create 3D models and clay mockups of what the product should look like in a person's hands.

Internal architecture and layout

Engineers figure out where to place the battery, memory chips, speakers, and cameras. Every millimeter of space inside a phone must be used efficiently.

Thermal management and cooling

Fast computer chips produce heat. Hardware engineers design heat spreaders made of copper or graphite to move heat away from delicate parts so the device does not overheat.

Durability testing

Engineers drop prototypes, bend them with mechanical arms, splash them with water, and bake them in heat chambers to ensure they survive accidental drops and rough use.

Mass manufacturing

Once the design is perfected, engineers work with factories to build millions of units using automated robots and laser-guided cutting tools.

Sustainability and green engineering

During his time leading Apple's engineering groups, Ternus placed a major focus on environmental protection and recycling.

Using recycled metals and materials

Making electronics requires metals like aluminum, gold, cobalt, and rare earth elements. Ternus helped push Apple to use 100% recycled aluminum in the enclosures of laptops and tablets.

Using recycled metal reduces the need for new mining, saves electrical energy, and lowers greenhouse gas emissions.

Designing for longevity and repair

Another major goal of modern engineering is making devices last for many years. Under Ternus, engineers improved the internal layout of phones so screens and batteries can be replaced more easily by repair technicians, keeping electronics out of landfills.

Personal life and hobbies

Outside of his executive work at Apple, John Ternus enjoys several outdoor and fast-paced sports.

Cycling and fitness

Ternus continues to stay active through cycling. He often rides road bikes on weekends to stay fit and clear his mind after long work weeks.

Car racing and motorsport

Ternus is an enthusiastic fan of car racing and automotive engineering. He enjoys driving sports cars like his Porsche on closed race tracks, including the famous Laguna Seca raceway in California.

He has also organized off-road rally driving trips in Washington state with his engineering colleagues, testing vehicles on dirt trails and gravel courses.

Key leadership lessons from John Ternus

Students interested in science, technology, and leadership can learn several lessons from Ternus's life and career:

• Start with strong fundamentals: Learning math and science in school builds the foundation for building real-world technology.
• Use skills to help others: His college project helping people with physical disabilities proved that engineering can improve human lives.
• Listen and collaborate: Being a great engineer means working well with others, listening to feedback, and helping teammates solve hard problems.
• Care about the details: Great products come from caring about tiny details, from the feel of a button to the recyclability of an aluminum case.

Summary of career milestones

• 1997: Graduated with an engineering degree from the University of Pennsylvania.
• 1997–2001: Designed virtual reality headsets at Virtual Research Systems.
• 2001: Joined Apple to work on computer displays.
• 2013: Named Vice President of Hardware Engineering for Mac, iPad, and AirPods.
• 2021: Promoted to Senior Vice President of Hardware Engineering.
• 2026: Named Chief Executive Officer of Apple.