Jennifer Rumsey is apparently too vital to Cummins to split the Chair and CEO roles, yet free enough to join 3M’s Board and sit on its Science, Technology and Sustainability Committee. The Cummins crown stays welded on. The calendar, magically, has room for another corporate chair. Funny how that works.
The Party Chair Has Entered Another Room
Jennifer Rumsey has found another boardroom.
Not a quiet industry panel. Not a breakfast roundtable with stale pastries, recycled tote bags and a motivational lanyard. A 3M board seat. Effective 5 June 2026. Announced with the usual investor-relations embalming fluid about leadership, innovation and deep industrial experience.
Then 3M did the funny bit.
It put the Cummins Chair and CEO on its Science, Technology and Sustainability Committee.
Science. Technology. Sustainability.
That is where 3M has parked the boss of a diesel-engine giant tied to the largest Clean Air Act civil penalty in history. You can almost hear the corporate crockery being set out. A little sustainability plate. A little innovation spoon. And a little reputational napkin folded over the smell.
Cummins shareholders, meanwhile, have repeatedly been asked whether one person should hold both the Chair and CEO roles. The board’s answer keeps coming back the same. No split. No surrender. Jennifer can supervise Jennifer. Chair Rumsey can oversee CEO Rumsey. The mirror can interview the mirror and call it governance.
Now, however, she has taken another seat elsewhere.
Too indispensable to share power at Cummins. Available enough to lend 3M the good crockery.
The Crown Stays Welded On
TCAP covered this over a year ago.
On 14 May 2025, this project published Cummins Confidential : Rumsey Refuses To Relinquish Power, after another shareholder attempt to split the Chair and CEO roles failed. The point was simple then and it is simple now. A CEO who also chairs the board is not being watched properly. That is not oversight. That is a man in a restaurant kitchen licking the thermometer and awarding himself five stars.
Cummins’ 2025 filing recorded 43,023,230 votes for the independent board chair proposal and 60,921,624 against. It failed, but it was not some lonely crank waving a placard in the rain. Millions of votes looked at the structure and said the room smelled wrong.
Then the same issue returned in 2026. Again, shareholders were asked about separating the Chairperson and Chief Executive Officer roles. Again, the proposal failed. Cummins kept the crown welded to the same head and called the burn mark strategy.
Then 3M arrived with another chair.
That, however, is the part Cummins will not want framed properly. Rumsey is apparently too important to Cummins to give up one of her two top roles, but not too occupied to join another public-company board. She is essential enough to remain both management and oversight at Cummins, yet spare enough to sit in 3M’s sustainability shop window.
The Cummins board wants investors to believe this is disciplined governance. It looks more like a table where the same person has taken the starter, main, dessert, wine list and the complaint form.
The Progressive Wrapper
Let’s not pretend this is difficult.
TCAP is not claiming to have found a secret Cummins memo saying “appoint woman before emissions corpse starts leaking”. We do not need the memo. The public timeline has its own smell.
Rumsey became President and CEO in August 2022. Cummins then made her Chair and CEO effective August 2023. The announcement came wrapped in transition language, decarbonisation patter, customer needs and Destination Zero theatre. She was the engineer. The first female CEO. The clean-shirt future face. The human proof-point that Cummins could point at while asking the market to look forward and not down into the sump.
Then January 2024 came through the door.
The EPA and DOJ announced the Cummins Clean Air Act settlement. Model years 2013 through 2023. Illegal software defeat devices on 630,000 vehicles. Undisclosed auxiliary emission control devices affecting those vehicles and about 330,000 more. Nearly one million vehicles. A $1.675 billion penalty. The largest civil penalty in the history of the Clean Air Act.
That is not baggage. That is a body in the accounts ledger.
Rumsey did not personally manufacture every historic piece of that emissions mess. That is not the argument. Instead, the sharper point is that Cummins elevated a progressive-looking public face at exactly the moment it needed one. A woman. An engineer. A decarbonisation narrator. A STEM-friendly antidote to the old diesel stink.
If she is not the patsy, she is doing a flawless impression of one.
The CEO Who Turns Up For The Nice Bits
TCAP has emailed Jennifer Rumsey for comment on serious issues. More than once.
No response has been received.
No answer. Zero. No rebuttal. No brave executive stepping forward to explain the record. Silence. The kind of silence that arrives in a legal-department overcoat, refuses eye contact and leaves by the side door.
But Cummins can find her for ceremonies.
There she is for Arbor Day, with nearly 50 volunteers and more than 50 native trees in Indianapolis. More than 50 trees. For a company whose emissions settlement involved nearly one million affected vehicles, that is not redemption. That is garnish. A little parsley on a plate of regulatory offal.
Nobody is attacking the trees. Trees are lovely. Plant forests. Plant one through the boardroom carpet and let the roots take the projector. However, the issue is not the saplings. The issue is the ratio.
Yet Cummins can locate its Chair and CEO for fifty-odd trees and a soft quote about cleaner air. It cannot locate the same Chair and CEO for TCAP’s hard questions.
That is not leadership visibility. That is selective deployment.
Rumsey appears when the company needs a photograph, a civic smile, a quote about community well-being or a green little wipe across the diesel counter. When the subject turns to emissions, governance, labour, legal conduct or accountability, she vanishes like a witness who just remembered a train.
Birthday Cake Governance
Then there is the party circuit.
Cummins marking 60 years at Darlington had the full corporate nostalgia tasting menu. Heritage. Apprenticeships. Engines. Local pride. Export glow. Future-ready manufacturing. Hydrogen hints. Royal approval. Enough anniversary frosting to glue a brass plaque to a turbine.
Darlington matters. The workers matter. The history matters. TCAP has no issue with skilled workers, apprenticeships, engineering pride or people building real things with their hands. Those people are not the joke. They are usually the only people in the building doing anything that still smells real.
Instead, the joke is Cummins using them as moral upholstery.
When Cummins needs warmth, it points at workers. When it needs futurism, it points at technology. And when it needs forgiveness, it points at sustainability. When it needs progressive leadership optics, it points at Rumsey.
Give her a ribbon, a sapling, a commemorative cupcake or a branded backdrop and the schedule clears. Ask about emissions, governance, labour, legal conduct or TCAP’s direct questions and suddenly the diary becomes a haunted house.
That is the thing about ceremonial executives.
They never miss the birthday cake.
They only disappear when the bill arrives.
3M Must Need An Air Freshener
3M’s appointment is the cleanest continuation of the same trick.
It did not merely appoint Rumsey as a generic director. It placed her on the Science, Technology and Sustainability Committee. That does work. It sends a message. 3M borrows the Rumsey wrapper: engineer, CEO, Chair, innovation, decarbonisation, global manufacturing, sensible future.
However, it also borrows the stink.
Rumsey chairs and runs Cummins. Cummins paid and agreed to a settlement linked to emissions software features, defeat devices, undisclosed auxiliary emission control devices, nearly one million affected vehicles and a record Clean Air Act civil penalty. That does not disappear because another company says “long-term value” in a press release. It just gets laminated.
Then 3M looked at that profile and said: sustainability committee.
Of course it did. Corporate America loves a redemption aesthetic with no confession attached. Put the diesel CEO on sustainability. Put the emissions company’s clean-future face on another board. Let the same boardroom class applaud itself for perspective while the paperwork wheezes quietly under the table.
What Has 3M Got Coming?
Which raises the obvious question.
What has 3M got coming?
Is there another scandal warming under the pass? A regulatory corpse about to be found in the walk-in? Some boardroom smell that needs a first-female-CEO scented candle placed over it before investors ask why the wallpaper is breathing?
Or is it simpler than that?
Maybe 3M just has a party coming up.
Perhaps there is an anniversary lunch, a sustainability breakfast, an innovation summit with bad coffee and worse ethics, or a tree-planting photo call where someone needs to stand near a sapling and say “future” without laughing. Maybe someone in comms looked around and thought: get Rumsey. She is good for this. She can hold a shovel, nod at a banner and make the air feel briefly less contaminated.
That sounds harsh until you remember 3M’s own baggage. PFAS. Combat Arms earplugs. Settlements. Litigation. Public mess. This is not a company walking through the world with clean shoes. It knows exactly what reputational spillage smells like once the lawyers have warmed it through.
So perhaps Rumsey is not joining 3M because everything is clean.
Perhaps she is joining because something needs cleaning.
Portable Reputational Furniture
This is Rumsey’s real corporate function now.
Wheel her in. Place near logo. Add sustainability nouns. Photograph shoes. Issue quote. Remove before questions.
At Cummins, she is the clean front end on the diesel machine. At 3M, she becomes imported credibility. Not because the facts are clean, but because the photo is useful. She is portable reputational furniture. A human air freshener in a blazer.
The cruelty, of course, is that it works.
Boards love the symbol. Investors get the signal. PR teams get the headline. ESG decks get a smiling engineer. The company gets to say transition, innovation, science and sustainability while everyone politely avoids the dead thing under the table.
Rumsey may believe every word of the script. That is possible. Corporate people often do. They can stand in front of the sausage machine, praise the seasoning and never ask why the floor is sticky.
However, belief does not change function.
If you are wheeled out for trees, anniversaries, sustainability committees and progressive optics, while silence answers the accountability emails, you are not merely leading. You are decorating the scene.
The Cardboard Chair
Cummins should install a cardboard cut-out in the boardroom.
Nothing extravagant. Life-sized Jennifer Rumsey. Laminated for governance resilience. A speech bubble saying “Destination Zero”. A little pull string for investor meetings. Tug once for “innovation”. Twice for “energy transition”. Three times for “we take these matters seriously”.
It could sit by the speakerphone and supervise CEO Rumsey while Chair Rumsey is at 3M helping another company find a cleaner-looking backdrop.
In fact, that might actually improve the independence problem. At least the cardboard version would be visibly fake.
Meanwhile, the current arrangement asks shareholders to pretend there is no issue. Chair Rumsey oversees CEO Rumsey. CEO Rumsey reports to a board chaired by Chair Rumsey. Chair/CEO Rumsey then joins 3M while Cummins shareholders are still staring at the same governance knot and being told it is a bow.
A cardboard cut-out would not answer TCAP’s emails either. But nobody would expect it to.
Cummins could wheel it out for parties. Darlington birthday? Cardboard Jen near the cake. Arbor Day? Cardboard Jen with a shovel taped to one hand. Investor day? Cardboard Jen beside the word “transition”. 3M committee clash? No problem. The cut-out can stay at Cummins, supervising itself in the corner like the rest of the governance model.
Patsy Or Power Player?
Here is the uncomfortable part.
Is Rumsey a patsy, a shield, a power player, or all three?
After all, she inherited legacy emissions baggage and became the progressive face at the exact moment Cummins needed cameras pointed somewhere cleaner. That supports the patsy theory. She looks like the acceptable front end fitted over a diesel machine already making regulatory noises in the walls.
But she is not some junior employee holding the wrong folder.
Rumsey is Chair and CEO of Cummins. She sits at the top of management and the top of the board. She kept those roles through repeated shareholder pressure. Now she has an external 3M board seat too. At some point, if you keep accepting the crowns, you own the fucking throne.
That is why, if anything, “patsy” does not soften her.
It makes the indictment nastier.
If Rumsey is a patsy, as I suspect, she is a highly compensated one with power, titles, platforms and committee seats. If she is the progressive face, she chose to keep wearing the mask. And if she is the sustainability narrator, she keeps reading the script. If she is the Chair, she owns the governance optics. And if she is the CEO, she owns the silence.
Nobody forced her to be the human air freshener.
The Clean Future Has A Catering Bud
Spare us the essential-focus routine.
Spare us the idea that Cummins needs one person holding both top roles because the moment is too critical, too complex and too strategically delicate for ordinary governance. Apparently it is not too delicate for that same person to go and sit on another company’s board.
That is the punchline.
Rumsey cannot relinquish power at Cummins, but she can take more elsewhere. She cannot split the role at home, but she can expand the portfolio outside. She is too indispensable for governance reform, yet available for 3M’s sustainability optics.
Either way, the boardroom miracle continues.
Cummins did not discover accountability. It discovered branding. It put a progressive face on a diesel scandal, kept that face in both top roles, ignored the governance discomfort, wheeled her out for trees and birthday cake, then watched 3M turn the same face into a sustainability committee asset.
There is your clean future.
A handful of trees. A birthday party. A 3M board seat. A cardboard cut-out in the Cummins boardroom. A $1.675 billion emissions settlement sitting in the accounts ledger like a body nobody wants to identify.
The paperwork says “Science, Technology and Sustainability”.
The room says: bring Febreze.
Lee Thompson – Founder, The Cummins Accountability Project
Sources
- 3M Announces New Board Appointment
- Cummins 2026 Form 8-K Annual Meeting Voting Results
- Cummins 2025 Form 8-K Annual Meeting Voting Results
- Cummins Confidential : Rumsey Refuses To Relinquish Power
- Jennifer Rumsey Named Chair Of The Cummins Board Of Directors Following Retirement Of Tom Linebarger
- 2024 Cummins Inc. Vehicle Emission Control Violations Settlement
- Growing Stronger Communities On Arbor Day
- Cummins Marks 60 Years Powering Darlington
- 3M Settlement With Public Water Suppliers To Address PFAS In Drinking Water Receives Final Court Approval
- Combat Arms Earplugs Settlement Moves To Final Resolution