Amazon warehouse workers used to spend much of their days walking, pushing carts through long aisles to manually retrieve customer orders from shelves.

Today, hundreds of "Hercules" robots do this instead, carrying towering yellow storage pods filled with inventory to employee workstations.

"I'd walk like 10 miles a day on average," said Mohammed Khan, who started as an entry-level picker 12 years ago and is now a senior manager at an Amazon warehouse in Tracy, California.

Amazon's robots "cut down all that walking time," he told Business Insider during a recent tour of the facility.

This site is ground zero for a wave of automation that's beginning to wash over the industry. The warehouse and logistics sectors have been powerful sources of job growth since Amazon kicked off the e-commerce revolution 30 years ago, as Business Insider's award-winning Warehouse Nation series revealed in 2022.

If robots automate many warehouse tasks, this powerful engine of job growth could grind to a halt, wiping out thousands of positions and countless opportunities for future workers.

Amazon says employees are being retrained to do more valuable work, such as managing and maintaining robots. Will these new jobs be enough to cover what might be lost? Or could we actually end up with more or better jobs?

Business Insider went looking for answers inside the giant facility in Tracy, a city in California's Central Valley where suburban neighborhoods give way to open farmland.

"Autonomous to an extent"

Across 1.4 million square feet — the equivalent of 23 football fields — robots with names like Hercules, Robin, Cardinal, Pegasus, and Proteus move inventory and sort packages. But they don't run the warehouse alone. Human workers still pick and pack orders, load trucks, and intervene when automated systems fail.

Jobs have not disappeared, but they're changing. Machines increasingly handle work that once required employees to walk miles and lift boxes, while workers monitor and troubleshoot them. The Tracy site employs more than 3,000, up from roughly 1,000 when it opened in 2023, an Amazon spokesperson told Business Insider.

"They're autonomous to an extent," Khan said of his robot counterparts. "They still need a lot of help and maintenance and oversight."

An Amazon spokesperson said rising customer demand drove the facility's workforce growth and that robots help workers process more packages safely and efficiently rather than simply replacing them.

Amazon's more automated, next-generation fulfillment centers are about 25% more productive and cut order-processing time by as much as 25%. And these sites support roughly 30% more skilled jobs in areas including reliability, maintenance, and engineering.

The "Quarterback" watches robots

One of the workers now doing that kind of job is Briana Brager.

She joined Amazon about two years ago as an entry-level employee after spending years caring for her family. She had no prior experience in a traditional workplace.

Today, she's a process assistant who helps oversee the warehouse's robotic systems. When a chute jams or a robot stops working, she coordinates the response to keep packages moving.

"The robots do a lot, but we still have to maintain them," she said.

Brager began as a picker before moving into a specialized role supporting robotic-floor operations. She got two weeks of intensive training, followed by additional job shadowing, to learn how to work safely around the equipment. Her current job is less physically demanding than her previous one, she said.

Her role is informally known as the "quarterback" position. She monitors fleets of robots and dispatches employees when a machine needs intervention.

"We call the shots," Brager said.

Meet Robin

At the Tracy warehouse, humans and robots move orders together from storage to the loading dock. Employees stow individual items in fabric inventory pods, which Hercules robots carry to pick stations. Workers retrieve the items, then pack and label them.

Robin, a large robotic arm, picks finished packages off a conveyor and places them on small Pegasus mobile robots. Pegasus carries the packages to staging areas alongside other orders headed to the same destination. Cardinal then loads the sorted orders into carts, and Proteus ferries the carts toward outbound trucks.

Khan, the warehouse manager, said workers performed Robin's task manually until a few years ago. They handled packages one at a time, checked them for damage, scanned them, and fed them into the sorting system. He estimated that one Robin can perform roughly the work of two to seven people doing that process manually.

Amazon said that when it introduces systems such as Robin, employees take on other work at the site, including operating robots, clearing jams, monitoring the robotic floor and quality control, and maintenance engineering.

Robots move the carts, too

Proteus offers a clear example of how these new warehouse jobs are taking shape. Amazon brought the robots to Tracy last year.

Unlike Hercules, which operates in fenced-off areas, Proteus can move through spaces shared with people. There are roughly 200 of the robots at the Tracy facility, Amazon said.

Before Proteus arrived, workers manually pushed carts filled with packages to the loading dock. Now the robots pick up full carts, carry them to staging areas near the dock, and retrieve empty carts for the return trip.

Some employees who once moved those carts now work as "ground-floor monitors," Amazon said. Instead of spending their shifts moving packages, they respond when a Proteus reports a fault. If the problem is simple, they can reset the robot; otherwise, human maintenance staff take over.

Some workers trained in these jobs have gone on to Amazon's mechatronics apprenticeship program, which can lead to more technical maintenance work.

When automation hits the "jackpot"

For all the robots moving through the Tracy warehouse, people remain essential when automation breaks down.

Amazon calls one such destination the "jackpot." When an item loses its routing information while moving through the facility, the automated system sends it to this area, which works a bit like a lost-and-found for packages.

Here, a human worker must determine where the wayward package belongs and return it to the correct flow. "It will require manual intervention," an Amazon representative said.

Other situations require human judgment, too. Products can fall from storage pods and inventory can be damaged or mislabeled. Packing individual products into boxes and loading them onto delivery vehicles are tasks that also remain heavily dependent on people.

This helps explain why even a highly automated Amazon warehouse still employs thousands of workers. The company said it needs people for new packing stations as well as roles across the facility that keep operations running safely and efficiently.

Current and future Tetris

By the time packages get to the loading dock at the Tracy facility, the robots are gone. At least for now.

A person loads each trailer. Amazon uses equipment that extends into the trailer and adjusts to a worker's height, reducing bending and back-and-forth walking. But workers still arrange the packages themselves, trying to fill the trailer to use as much of the space as possible.

"It's a lot of Tetris," one Amazon representative said.

Amazon is already exploring how to automate this task, though. As Business Insider previously reported, Project Tetromino aims to use AI and robotics to automate sorting and vehicle loading at delivery stations, where the work has long remained stubbornly manual.

But that vision remains a work in progress. Amazon's machines can carry shelves, sort packages, stack boxes, and move carts around people. Workers still pack orders, load trailers, perform quality checks, handle hiccups and exceptions, and keep the machines running when they fail.

For Amazon, the immediate payoff is not necessarily a warehouse with fewer people, but one where the same workforce can accomplish more. Tracy employs roughly the same number of people as a nearby Amazon facility with fewer robots, company officials said, but the Tracy location processes more volume.

Khan compared the technology to something far less futuristic: a calculator.

The robots streamline work that once consumed employees' time without necessarily eliminating the work itself, he said. "It's not that the amount of work has changed," he said. "It's how we approach it."

Asked whether robots could eventually replace more jobs, including his own, Khan did not try to predict the future.

"Who knows? That's not in our purview right now," he said. "But I would say roles are evolving, and that's the cool aspect about it."

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• Rick Nott has used AI to save himself a lot of tedious work as a wealth advisor.
• He said new AI products may help other advisors save time too, but they won't replace humans.
• Nott spoke to Business Insider about how he uses the technology to save him time now.

Rick Nott is a senior managing director and private wealth advisor at Santa Monica, California-based Angeles Wealth Management. He spoke to Business Insider about how he uses AI, and why he's excited and afraid when looking at AI-native financial planning platforms. The conversation has been edited for length and clarity.

When Claude first rolled out its solution for financial advisors, I felt fear and excitement. How complicated will it be? How will it work?

I'm not a software developer, but I have some basic tech skills. LLMs have allowed me to dig into coding, which I'd been avoiding learning because it's a lot of work. I know enough to know what I want, how it should look, and how to check the outputs, and now I can automate more of my process. AI has become the glue between the various systems we use and the different workflows we have.

I've shown some colleagues how I operate. One told me that I basically have another full-time employee's worth of output through the technology, by automating data collection processes and making it easier to analyze my clients' portfolios.

What AI unlocks

I started my career while still in college in the late 2000s doing data reporting work for a wealth firm. Between all of the software advisors use, there's a lot of manual work, typically done in Excel, to connect it together.

Previously, I could only provide balance sheet reporting for clients with more than $100 million because it took so much manual work. Now I can do it with someone with significantly less.

As a family's net worth grows, so does complexity. For many, understanding their overall financial system is their biggest pain point.

Banks and brokerage accounts are the easy part, but trusts, business ownership structures, and private investments, which all report differently and require cash on hand to make capital calls, can take huge amounts of manual work to analyze.

Imagine a wealth advisory business serving 30 families, each holding about 10 private investments. Each investment generates about 10 documents a year, including quarterly reports, capital calls, distribution notices, and tax documents. Each of these 3,000 documents takes a skilled analyst 15 to 30 minutes to analyze and distill into our reports.

That's 750 to 1,500 hours a year, most of it crammed into the few weeks after each quarter closes. With AI, that data is extracted and mapped as it arrives, and one analyst reviews the work instead of a team racing against a deadline.

Our goal is to create a one-page document or report on their phone that's as close to real-time as possible.

There's a lot you can do with all of your data in one place. For example, a two- or three-sentence prompt could expand into a full email to a client, with all relevant and accurate information already populated. You can then personalize that to fit the right tone for your client.

How AI changes the job

AI tools like Claude for financial advisors will be disruptive, and others will gain access to the same connectivity I've built.

I think of it as part of a dynamic that's been going on for years in my industry. Vanguard, ETFs, lower costs, and robo-advisors have all put a squeeze on financial advisors.

But if you believe a lawyer's only job is writing contracts, or a financial advisor's only job is putting together a portfolio, there's a fundamental kind of misunderstanding of what the actual job is.

As long as investing involves human judgment, financial advisors will have a job. AI doesn't improve investment decisions or results.

I tell my clients that my role is to be the architect of their financial operating system, and, as with an actual operating system, a centralized source of data is essential.

When you have a big-picture view of what your family's mission is, you can avoid getting distracted by market noise and news. From there, you can go a layer down to make strategic plans and ask if we're moving in the right direction, and what opportunities we may have. Another layer down, we work with a CPA to save money on taxes.

A full picture of a balance sheet makes it possible to actually know what liquidity you have available. Now I can spend more time developing relationships, the thing that runs our business. I get to know anything and everything about the clients I'm working with and those I'd like to work with.

The future of financial advisors and AI

I have a natural excitement around tech, and watching the Anthropic webinar was incredible. My main concern is that it's not a subscription-based plan; it's token-based, which could lead to surprise bills for users who don't yet know how to manage their token usage.

At small RIAs without the expertise, people will be uploading 100-page PDF documents just to ask basic questions, like the ages of kids in a trust. That will rip through tokens.

We priced it out internally, and we would have to pay significantly more for a token-based plan instead of the subscription-based licenses we have now. Maybe eventually everyone will have to pay for tokens that way, and the cost of tokens is going down.

We learn to do things faster and at lower cost, but in this industry, we do that for a particular reason: to spend more time with the people we serve.

The primary way that our clients give us information is still by talking. There's a significant amount of nuance. You may be able to understand something and infer what's really being said. But note-taking software is still wrong all the time. You have to review it.

Money is emotional, and I seriously question whether AI can replace our need to connect with another human being.

Do I see someone sitting across the table from AI on a speakerphone? Probably not.

• Bill Gates says AI will bring about an age of abundance in 20 years, but it'll be a rocky road.
• He predicted robots will displace human workers and "build houses, grow food, do surgery."
• Some jobs might be reserved for people, and work limits could preserve employment, Gates said.

Bill Gates says AI will create "true abundance," but the next two decades before it arrives will be "as tumultuous a period as there's been in human history."

"My big concern is this 20-year transition period, where they'll have winners and losers and a lot of disruption," the Microsoft cofounder and billionaire philanthropist said on the latest episode of the "Decoder" podcast.

Gates echoed widespread concerns about white-collar jobs, saying that telesales, telesupport, and accounting will disappear as AI will be able to do those "radically cheaper, radically faster, and even more accurately." As for blue-collar jobs, humanoid robots will take over those, he said.

"If we don't choose to massively slow down or stop, then we will have robots that can build houses, grow food, do surgery," Gates said. "And none of the things that human labor provides to the economy will be necessary for most goods and services."

He also underscored how jarring it will be for someone like him, whose vast resources have allowed him to lead the charge toward eliminating malaria and tackling other humanitarian crises.

"And when the AI says to me, 'No, I'm better than you, you go play pickleball and I'll get back to you, I'm gonna take care of this' — I mean, it's kind of humorous, but it's not humorous," he said.

Gates shared his long-held view that work is vital to giving people a sense of purpose, a way to earn an income, a reason to show up every day, an avenue to build relationships with colleagues, and a path to build things and solve problems.

He suggested that certain activities such as art, sports, cooking, and childcare could one day be reserved for humans, "even though the AI could do those things better."

Gates also highlighted that measures such as early retirement and caps on working hours could help maintain some level of human employment.

He envisioned some people saying, "Let's be like the Amish and let's only use AI for certain things," so they won't have to give up "helping each other or coming up with unique ideas."

Amazon founder Jeff Bezos and JPMorgan CEO Jamie Dimon have both proposed a shorter workweek as a less painful alternative to AI-driven unemployment.

Gates is one of several tech leaders to warn of job disruption on the road to an age of abundance.

Elon Musk has predicted a "bumpy" transition and proposed government checks for all as the best solution to AI-driven job losses. He's said that technology will drive production costs so low that everyone can have "whatever stuff they want," work will become "optional," and it's not worth saving for retirement in 10 or 20 years as money won't matter.

Similarly, Anthropic's Dario Amodei has said that AI promises to "raise the quality of life for everyone," but the "short-term shock will be unprecedented in size."

However, OpenAI's Sam Altman said in May that AI hasn't eliminated as many white-collar jobs as he expected, and he no longer anticipates a "jobs apocalypse."

Despite widespread worry about AI taking corporate jobs, and high-profile layoffs at major companies such as Amazon and Meta, national unemployment hasn't increased materially during the AI boom.