small business consultant | Tulsa, oklahoma
We don't just advise your
business. We build it.
Private equity firms keep whole teams on hand to make a company more valuable
— tighten the operation, clean up the books, sharpen the digital presence, structure
the growth. That attention normally starts at companies worth millions. Sigma brings
the same caliber of work to small businesses and startups, and we do it from inside
the business instead of from a slide deck.
$200
Discovery session, plan included
4 pillers
Financial, digital, operational, strategic
Fee or equity
We can get paid on equity
Owasso, OK
Serving Tulsa metro & remote
Who we are
Most consultants sell advice. Most investors buy control. We do neither.
Sigma is an operational architect: we work inside the business, not around it. We build the books, the website, the systems, and the growth structure itself — and depending on the engagement we get paid in fees, in equity, or in both.
This is for the plumber scaling past one truck, the founder still running everything from her phone, the shop that is profitable but chaotic. It is the kind of work most firms consider too small to bother with. That is exactly who we exist for.
01
Financial
Clean books, real margins, cash you can see coming. The same financial clarity an investor would demand before writing a check.
02
Digital
Website, search presence, and the way customers find and judge you. Built to bring in work, not to win design awards.
03
Operational
Systems, documented processes, and the daily rhythm of the work - Lean Six Sigma discipline - scaled down to fit a small team.
04
Strategic & Capital
How the company is structured to grow: pricing, capacity, ownership, and the kind of deal thinking usually reserved for much larger businesses.
sound familiar?
You do not need more effort.
You need the business built properly.
Owners rarely get stuck because they are not working hard enough. They get stuck because the company was never built to run without them.
You are working in the business instead of on it
The books are behind and you are guessing at profit
Customers cannot find you online, or the website looks dated
Every process lives in your head, so nothing runs without you
You have five vendors and none of them talk to each other
Growth keeps stalling and you cannot pinpoint why
What we do
Five service lines, one connected build.
Most owners juggle a bookkeeper, a web guy, a marketing agency and a business coach — and
none of them see the whole picture. Every service below feeds one of the four pillars, so the
numbers, the systems and the marketing finally point the same direction.
Strategic
Business Consulting & Coaching
The whole-company review: we look at the money, process, technology, and structure the way an investor would before buying in - then hand you a plain-English plan for what to fix and in what order.
Financial
Bookkeeping & Financial Clarity
We keep your books clean and read them back to you: real margins, cash flow you can plan around, and numbers good enough to stand up to a lender or a buyer.
Digital
Web Design & Digital Presence
We build the website, local SEO, and online presence customers use to decide whether to call you - treated as a revenue asset, not a brochure.
Operational
Operations, Systems, & Automations
Lean Six Sigma process work, written SOPs, software cleanup and automation so the business stops running through the owner's phone and starts running on a system.
All Four
Startup & New Business Setup
Starting out? We install the financial, digital, and operational foundation on day one - the setup an investor would want to see, before bad habits get expensive.
Not sure where to start?
Take the free business health check and we will point you to the gap that is costing you the most right now.
how it works
It starts with a discovery session
Before anyone talks about ongoing work, we find out what is actually happening in the business. You walk away with a written action plan you own - no obligation to continue.
Step One
Discovery Session
We go through the business the way a buyer would: the money, the workflow, the digital presence, the structure. Two hours with you, plus our own review time afterward.
Step two
Gap Report
The same kind of write-up an investor gets before a deal — every gap documented and ranked by what it costs you, what it risks, and how hard it is to fix. Written in plain English.
Step three
Action Plan
A sequenced plan with owners, timelines and measures. Yours to keep and run yourself, whether or not you ever hire us again.
Step four
We build it with you
If you want the work done rather than described, we get in and do it — books, systems, website, hiring, growth structure — for a fee, for a share of the upside, or both.
in their words
What owners say afterwards
Among other things, Sigma assisted us with setting up our entire website. We are able to get our message access, track donors, and increase our reach more efficiently than before. Highly recommend Nathan and Sigma to any small business or non-profit that needs some help growing!
We highly recommend Nathan and Sigma for all of your business foundation needs! He helped us make our processes more efficient and went above and beyond to help us fix a few errors with other aspects of the business when he didn't even have to - that is the support you get with him! So what are you waiting for??
Great experience! Nathan is so professional and amazing at what he does. Highly recommend!
after the plan
Four ways to keep working together
From a light monthly cadence to a profit-share partnership where we take a stake in the outcome.
Which one fits depends on
Foundation
Startups and solo owners
STARTING ENGAGEMENT
Blueprint
Growing teams under 10
SCOPED MONTHLY
Architect
Established small businesses
CUSTOM SCOPE
Profit Share
Operator-investor partnerships
EQUITY OR PROFIT- BASED
next step
Start with a discovery session
A deep dive into your finances, operations, digital presence and structure. You leave with a written
action plan — whether or not you ever hire us again.
Sigma International. Private-equity discipline, startup-stage prices — business consulting, bookkeeping, web design and operations for small businesses and startups.
Services
Business Consulting
Bookkeeping
Web Design
Operations & Systems
Startup Support
company
About
Our Approach
Pricing
Business Health Check
For Marketing Agencies
Contact
contact
Owasso, OK
Serving Owasso, Tulsa, Collinsville, Broken Arrow, and small businesses nationwide.