Isaac Hetzroni
Sourcing and Manufacturing Expert, @thesourcingguy
These are operators who scaled supply chains for brands like Gymshark and AG1. Book a 1:1 session to find a factory, vet a co-man, or fix a contract before it costs you the business.
About MentorPass
The list
We ranked these operators by what they have built and how founders rate them. Start at the top.
Sourcing and Manufacturing Expert, @thesourcingguy
Isaac built his name as @thesourcingguy advising founders on global sourcing, manufacturing, and supply chain. He has run 20+ sessions on MentorPass at a perfect rating. If you need to find a factory overseas or gut-check a manufacturer before you commit, he is the first call.
Sound familiar?
The problems founders bring our sourcing operators — and what they walk away with.
How to source and vet good contract manufacturers: where to look, key questions, red flags.
A shortlist of vetted manufacturers and a checklist of the questions and red flags that separate the real ones from the rest.
Our current manufacturing partner has been inconsistent and I want guidance on vetting and transitioning.
The scope
The work our sourcing operators take on, from first call to ongoing.
Find and shortlist factories, co-mans, and labs that fit your product, your volume, and your geography.
Pressure-test candidates with the right questions and red flags before you send a deposit.
Get category pricing benchmarks and a plan to secure price breaks against future volume.
Break a quote down to cost per component and structure terms that hold up on quality and volume.
Build the quality checks and compliance controls that keep a bad batch from reaching customers.
How MentorPass works
Find your expert, book a call, solve your problem — and keep them on when you’re ready.
Browse the ranked list of vetted operators. Every profile shows their track record, the brands they’ve scaled, and exactly what they go deep on.
Pick a time and share your context up front. They review it before you meet — no spending the first 20 minutes on background.
The guide
A sourcing consultant helps you decide who makes your product and on what terms. That covers finding factories, co-mans, and labs that fit your volume and geography, vetting them before money changes hands, negotiating price, and structuring the contract so it protects you on quality and cost. For a physical-product business, these are the decisions that determine whether you have a business at all. A bad factory pick or a loose contract shows up months later as a delayed launch, a failed batch, or margin you can never get back.
The work is concrete. It looks like turning a vague cost-per-piece quote into a real cost per component. It looks like a list of the questions to ask and the red flags to walk away from. It looks like the warm intro to a lab that takes small orders and actually moves fast.
Hire someone who has run the floor, not someone who read about it. The difference shows up fast. An operator who scaled a real supply chain knows where it breaks when demand jumps, which suppliers stall, and what a fair price looks like in your category. Ask what they built and what the numbers were. On MentorPass that is on the page: Chris Ormonde scaled Gymshark's operations from 5M to 500M+ pounds, Ben Smith was COO at AG1 through a 1.2B valuation, and Isaac Hetzroni advises founders on global sourcing full-time as @thesourcingguy.
Match the operator to your category too. Beauty and supplements have their own labs, compliance rules, and lead times. A formulator like Mary Berry of Cosmos Labs or a compliance lead like Nate Call will see things a generalist misses.
Most founders here run ecommerce and CPG brands. They are usually past zero and into the messy middle, where the wrong supplier decision is expensive enough to matter. They book a session to gut-check a manufacturer, vet a co-man, or fix a contract before signing.
You book by the session, not on a retainer. You bring a specific decision, get a clear answer from someone who has made it before, and come back when the next one lands. The operators are real, the ratings are real, and you pick based on what they have built.
Proof
Average rating
Written reviews
Sessions booked
Expert operators
Matt is a trustworthy, reliable mentor who guided us through key technical manufacturing questions and helped us spot potential pitfalls to avoid.Matt is a trustworthy, reliable mentor who guided us through key technical manufacturing questions and helped us spot potential pitfalls to avoid. You can tell he knows the space and genuinely has your back. Highly recommend. ⭐⭐⭐⭐⭐
Why MentorPass
When you need sourcing help, you have four options. Here's how they actually stack up.
Industries
Real reps in these verticals, not theory. The kind of pattern-matching that only comes from having shipped in your category.
FAQ
They help you find factories, co-mans, and suppliers, vet them, negotiate terms, and structure the contract. On MentorPass that happens in focused 1:1 sessions where you bring a real decision and leave with a plan.
You book sessions with credits, so you pay per session rather than a retainer. Many founders get what they need in a single 30 to 60 minute call, then come back when the next decision comes up.
Every operator on this page has actually run sourcing, manufacturing, or supply chain at a real company. We rank them by track record and founder ratings, and you can see their session counts and reviews before you book.
Explore more
Pick a consultant and book a call — or tell us what you're working on and we'll route you to the right operator in the network.
Hire Founders & Operators from Top Brands
CEO at Qualitas, ex-MaryRuth's and doTERRA
Nate spent 15+ years running quality and compliance for CPG brands including MaryRuth's and doTERRA, and now leads Qualitas. He protects your supply chain and your reputation, the part of sourcing founders only think about after something ships wrong. Bring him your QC systems and your contract manufacturer terms.
Former Operations & Supply Chain Director, Gymshark
Chris scaled Gymshark's operations from 5M to 500M+ pounds in revenue, then went on to build supply chains for Represent, Adanola, Stussy, and Premier League clubs. He knows exactly where a supply chain breaks when demand outruns it. Use him when you are sourcing for growth you cannot yet see.
Product, Supply Chain & Manufacturing Expert
Justin takes founders from product idea to a finished thing in market, the full path through sourcing, supply chain, and manufacturing. He has run 30+ sessions at a 4.86 rating. Good fit if you are new to a category and need someone to walk you from sketch to first production run.
Former COO, AG1
Ben scaled AG1 to over 600M in revenue and a 1.2B valuation in four years, and has worked on hyper-growth brands like Earth Breeze, Sugarfina, and Williams-Sonoma. He has run 100+ sessions here at a perfect rating. One founder said his advice on logistics negotiation and channel mix was directly applicable to their US launch.
Founder & CEO, Cosmos Labs
Mary runs Cosmos Labs and helps CPG brands develop products and scale production. She lives on the lab and manufacturing side of sourcing, so she is the right person when you are trying to find a formulator or move from sample to volume. Strong fit for beauty and personal care founders.
Co-Owner & COO, Cowboy Colostrum
Matt co-owns Cowboy Colostrum, which he helped scale from zero to eight figures through DTC. Founders call him out for being open with real numbers from his own brand, rare in this space. He helped one team through technical manufacturing questions and spotted pitfalls before they hit. Bring him the messy operational details.
DTC Advisor, 200M+ annual revenue portfolio
Roman has 10 years and 200M+ in ecommerce behind him and is one of the most-booked operators here, 100+ sessions at a perfect rating. Founders come to him for operations and manufacturing and leave with a clearer view of the whole business. One brand says they 2x'd seven months after their call. Good when sourcing is one piece of a bigger growth question.
CEO at UniversaCare & Modern Mangal Jewelry
Millen runs two companies and has hands-on experience with acquisitions, bootstrapping, and SBA financing. He helps founders scale through operational discipline and strategic leadership. Useful when your sourcing decision is tangled up with how you finance and structure the company around it.
A clean transition plan to a reliable partner, with the QC systems in place so quality stops being a gamble.
What I should expect in terms of pricing and negotiation so I don't get ripped off.
Real benchmarks for your category and a negotiation approach that wins price breaks on future volume.
My background is in another category, so manufacturing here is new to me.
A working map of how production runs in your new category, from formulation to first order, with someone who has done it before.
How do I find legit, trustworthy labs or manufacturers in the U.S. who work with smaller founders?
Warm intros and named options that take small orders, plus a read on which ones move fast and which will stall you.
What does a real contract manufacturer agreement look like?
A contract that protects you on quality, cost per component, and volume, instead of a vague cost-per-piece quote.
Move off an inconsistent manufacturer to a reliable one without stalling production.
Get specific, prioritized advice you can act on this week — and keep working with them ongoing if it clicks.
Found your match? Keep your sourcing operator on as an ongoing advisor as you scale.
We've 2x our business since our call with Roman 7 months ago. He's a great listener who tries to truly understand your questions. We came for tactical advice, but he turned it into something much bigger & more impactful. Roman is easily one of the best operators in the DTC world. My mindset shifted completely to a much more strategic approach. Since then, we've doubled our business, grew the team, and our hiring quality has significantly improved by implementing his suggestions. Best call on MentorPass.
I recently had the chance to be mentored by Isaac, and it was amazing. Isaac provided so much value and insight that really helped me grow my fashion industrie knowledge. What I loved most was the little golden nugget of sourcing that Isaac shared. Overall, Isaac is a fantastic mentor who genuinely cares about your success. If you're looking to level up your skills and reach your goals, I highly recommend getting inspired by him.
An absolute pleasure & honor to talk with Ben - thoroughly enjoyed our time together. Ben listened well - he asked AMAZING questions in the lead-up to the call which meant a much more effective & impactful discussion. Ben Listened, brought relevant ideas & concepts for us to consider - he challenged our current way of doing things & also provided multiple tangible & useful tools that can be/will be/have been implemented immediately...along with some longer term thoughts & thinking models & suggestions He also validated many of the things & approaches we are taking with the business - which in itself was excellent as we are often so in the weeds it's hard to know if the path & 'million decisions' taken per day are actually right or not... MASSIVE thank you to Ben & also Mentor pass for making this call happen We look froward to more discussions Tom
| Who you actually get | Top 1% sourcing operators | Junior account managers | Unvetted freelancers | Hard to find senior talent |
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| Proven at your stage | Built & scaled real brands | A playbook, not your context | Varies wildly | If you can afford them |
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| Commitment | Per call — no lock-in | Monthly retainer | Per project | Salary + equity |
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| Cost | Per session | $$$$ / month | $$ / project | $$$$$ + overhead |
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| Ongoing support | Keep them on as an advisor | Locked into scope | Churn and rehire | Permanent headcount |
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Yes. A common reason founders book is that they have built in one category and manufacturing in a new one is unfamiliar. Operators like Justin Seidenfeld take you from idea to first production run in a space you have not made before.
That is one of the most common problems we hear. A consultant can map the transition, vet replacements, and put QC systems in place so the new partner does not repeat the same issues.
Yes. Sourcing decisions come in waves, from first factory to scaling production, so most founders book the same operator again as their needs change. Roman Khan and Ben Smith both have founders who return repeatedly.