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Tesla alumnus replaces ex-McLaren exec as Rivian’s new VP of engineering

Rivian R1S SUV at New York Auto Show 2019. | Image: Dacia J. Ferris/Teslarati

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It appears that Rivian Automotive recently welcomed yet another employee with an extensive background in Tesla. As indicated in a recent Bloomberg report, Nick Kalayjian, who spent over a decade at Tesla, will be joining Rivian as the company’s new vice president of engineering and product. Kalayjian will be replacing Mark Vinnels, a former McLaren executive who joined Rivian in 2017. 

A Rivian spokesperson has confirmed that Vinnels has indeed left the company, though the Michigan-based electric truck maker did not specify how recently his departure happened. Both Kalayjian and Vinnels could not be reached for comment by the publication. Rivian has also not released a statement about its new VP of engineering and product. 

Kalayjian will have big shoes to fill at Rivian, especially considering his predecessor’s formidable and extensive automotive background. Mark Vinnels, after all, is a veteran, and during his time with McLaren, he was in charge of several key projects like the design and development of vehicles like the 650S, 675LT, 570S, and even the critically-acclaimed 720S. 

That being said, Kalayjian’s background in electric vehicles is extensive. As could be seen in his LinkedIn profile, he was involved in the development of the original Model S powertrain from the architecture phase to volume manufacturing. He was later promoted to VP of Engineering, where he served as a key figure in the Model 3 ramp.

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It should be noted that Kalayjian is not coming over to Rivian directly from Tesla. He left the Elon Musk-led company in 2018 to work as the SVP of Engineering at Plenty, which develops indoor farming technologies. Since last month, Kalayjian also serves as a Board Advisor for Plenty. 

Both Rivian and Tesla are aiming to breach and potentially establish a mark at the lucrative pickup truck segment. Rivian’s R1T debuted to critical acclaim, and expectations are high for the vehicle’s start of deliveries next year. Tesla is also aiming to release the Cybertruck late 2021, though much of this goal relies on the rapid buildout of Gigafactory Texas. 

Interestingly enough, Tesla and Rivian are currently involved in a lawsuit over alleged thefts of trade secrets. In its complaint, Tesla noted that it has no issue with former employees going over to companies like Rivian, but it draws the line when former staff break NDA and share proprietary information with their new employers. So far, Tesla has accused Rivian of stealing sensitive information related to its recruiting processes, bonus and compensation plans for sales personnel, and manufacturing project management systems, to name a few. 

Rivian, for its part, has denied Tesla’s claims. The company has asked a judge to dismiss Tesla’s claims, and it has argued that the Silicon Valley-based EV maker’s claims fail to state sufficient allegations of trade secret theft. Rivian’s legal team further argued that Tesla did not really file its case to defend or protect any legitimate intellectual property rights. Instead, it was an attempt to slow down Rivian’s momentum and damage its brand, while discouraging employees to leave the company. 

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Simon is an experienced automotive reporter with a passion for electric cars and clean energy. Fascinated by the world envisioned by Elon Musk, he hopes to make it to Mars (at least as a tourist) someday. For stories or tips--or even to just say a simple hello--send a message to his email, simon@teslarati.com or his handle on X, @ResidentSponge.

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Tesla Semi expands pilot program to Texas logistics firm: here’s what they said

Mone said the Tesla Semi it put into its fleet for this test recorded 1.64 kWh per mile efficiency, beating Tesla’s official 1.7 kWh per mile target and delivering a massive leap over conventional diesel trucks.

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Credit: Mone Transport

Tesla has expanded its Semi pilot program to a new region, as it has made it to Texas to be tested by logistics from Mone Transport. With the Semi entering production this year, Tesla is getting even more valuable data regarding the vehicle and its efficiency, which will help companies cut expenditures.

Mone Transport operates in Texas and on the Southern border, and it specializes in cross-border U.S.-Mexico freight operations. After completing some rigorous testing, Mone shared public results, which stand out when compared to efficiency metrics offered by diesel vehicles.

“Mone Transport recently had the opportunity to put the Tesla Semi to the test, and we’re thrilled with the results! Over 4,700 miles of operations at 1.64 kWh/mile in our Texas operation. We’re committed to providing zero-emission transportation to our customers!” the company said in a post on X.

Mone said the Tesla Semi it put into its fleet for this test recorded 1.64 kWh per mile efficiency, beating Tesla’s official 1.7 kWh per mile target and delivering a massive leap over conventional diesel trucks.

Comparable Class 8 diesel semis, typically achieving 6-7 miles per gallon, consume roughly 5.5 kWh per mile in energy-equivalent terms, meaning the Semi uses three to four times less energy while also producing zero tailpipe emissions.

Tesla Semi undergoes major redesign as dedicated factory preps for deliveries

The performance of the Tesla Semi in Mone Transport’s testing aligns with data from other participants in the pilot program. ArcBest’s ABF Freight Division logged 4,494 miles over three weeks in 2025, averaging 1.55 kWh per mile across varied routes, including a grueling 7,200-foot Donner Pass climb. The truck “generally matched the performance of its diesel counterparts,” the carrier said.

PepsiCo, which operates the largest known Semi fleet, recorded 1.7 kWh per mile in North American Council for Freight Efficiency testing. Additional pilots showed similar gains: DHL hit 1.72 kWh per mile, and Saia achieved 1.73 kWh per mile.

These metrics underscore the Semi’s ability to slash operating costs through superior efficiency, lower maintenance, and zero-emission operation. As charging infrastructure scales and production ramps toward 2026 targets, participants like Mone Transport are proving electric semis can seamlessly integrate into freight networks, accelerating the industry’s shift to sustainable, high-performance trucking.

Tesla continues to prep for a more widespread presence of the Semi in the coming months as it recently launched the first public Semi Megacharger site in Los Angeles. It is working on building out infrastructure for regional runs on the West Coast initially, with plans to expand this to the other end of the country in the coming years.

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SpaceX weighs Nasdaq listing as company explores early index entry: report

The company is reportedly seeking early inclusion in the Nasdaq-100 index.

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Credit: SpaceX/X

Elon Musk’s SpaceX is reportedly leaning toward listing its shares on the Nasdaq for a potential initial public offering (IPO) that could become the largest in history. 

As per a recent report, the company is reportedly seeking early inclusion in the Nasdaq-100 index. The update was reported by Reuters, citing people familiar with the matter.

According to the publication, SpaceX is considering Nasdaq as the venue for its eventual IPO, though the New York Stock Exchange is also competing for the listing. Neither exchange has reportedly been informed of a final decision.

Reuters has previously reported that SpaceX could pursue an IPO as early as June, though the company’s plans could still change.

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One of the publication’s sources also suggested that SpaceX is targeting a valuation of about $1.75 trillion for its IPO. At that level, the company would rank among the largest publicly traded firms in the United States by market capitalization.

Nasdaq has proposed a rule change that could accelerate the inclusion of newly listed megacap companies into the Nasdaq-100 index.

Under the proposed “Fast Entry” rule, a newly listed company could qualify for the index in less than a month if its market capitalization ranks among the top 40 companies already included in the Nasdaq-100.

If SpaceX is successful in achieving its target valuation of $1.75 trillion, it would become the sixth-largest company by market value in the United States, at least based on recent share prices. 

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Newly listed companies typically have to wait up to a year before becoming eligible for major indexes such as the Nasdaq-100 or S&P 500.

Inclusion in a major index can significantly broaden a company’s shareholder base because many institutional investors purchase shares through index-tracking funds.

According to Reuters, Nasdaq’s proposed fast-track rule is partly intended to attract highly valued private companies such as SpaceX, OpenAI, and Anthropic to list on the exchange.

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The Boring Company’s Prufrock-2 emerges after completing new Vegas Loop tunnel

The new tunnel measures 2.28 miles, making it the company’s longest single Vegas Loop tunnel to date.

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Credit: The Boring Company/X

The Boring Company announced that its Prufrock-2 tunnel boring machine (TBM) has completed another Vegas Loop tunnel in Las Vegas. The company shared the update in a post on social media platform X.

According to The Boring Company’s post, the new tunnel measures 2.28 miles, making it the company’s longest single Vegas Loop tunnel to date.

The new tunnel marks the fourth tunnel constructed near Westgate Las Vegas as the Vegas Loop network continues expanding across the city.

The Boring Company also noted that the new tunnel surpassed its previous internal record of 2.26 miles for a single Vegas Loop segment.

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Construction of the tunnel involved moving roughly 68,000 cubic yards of dirt. The excavation process also used about 4.8 miles of continuous conveyor belt, powered by six motors totaling 825 horsepower.

The Boring Company’s Prufrock-series all-electric tunnel boring machines are designed to support the rapid expansion of company’s underground transportation projects, including the growing Vegas Loop network. Prufrock machines are designed for reusability, thanks in no small part to their capability to be deployed and retrieved easily through their “porposing” feature.

The Vegas Loop, specifically the Las Vegas Convention Center (LVCC) Loop segment, has already been used during major events. Most recently, the LVCC Loop supported the 2026 CONEXPO-CON/AGG construction trade show, which was held from March 3-7, 2026. 

As per The Boring Company, the LVCC Loop transported roughly 82,000 passengers across the convention center campus during the event’s duration. 

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CONEXPO-CON/AGG is one of the largest construction trade shows in North America, drawing more than 140,000 construction professionals from 128 countries this year.

The LVCC Loop forms the initial segment of the broader Vegas Loop network, which remains under active development as The Boring Company continues building new tunnels throughout the city.

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