Counsel that knows your name,not just your case number.
A general practice law firm built for the people and businesses of Cheyenne County. From the farm lease on your kitchen table to the estate plan that keeps your family whole — we handle it plainly, locally, and well.
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Western Nebraska
licensed in Nebraska
every new inquiry
local families & businesses
What we handle, under one roof.
Most of life's legal moments don't need a specialist in a Omaha high‑rise. They need a lawyer who knows the county, the courthouse, and your neighbors.
Wills, Trusts & Estate Planning
Plans that protect what you've built — from simple wills to multi‑generational family trusts and farm succession.
Family Law
Divorce, custody, adoption, and guardianships — handled with discretion and an eye toward what's best for the kids.
Business & Agriculture
Entity formation, contracts, land leases, water rights, and the day‑to‑day counsel small operations actually need.
Employment Law
Handbooks, employment agreements, wage disputes, and wrongful termination — counsel for both employers and employees.
Real Estate & Title
Residential and commercial closings, title review, easements, and property disputes across the Panhandle.
Oil & Gas
Title opinions, division orders, pooling applications, and mineral ownership work for operators and owners.
Probate & Trust Administration
Nebraska probate, estate administration, and the day‑to‑day work of administering a trust.
Energy Law
Datacenter development for landowners, CO2 sequestration, Chapter 70 power district counsel, and water rights across the Panhandle.
"I was taught from a very young age by my father and grandfather that there was no more honorable profession than that of being a lawyer."
The Mattoon family has practiced law in Nebraska for four generations. Steve's grandfather, Harold F. Mattoon, served as Gage County Attorney, Beatrice City Attorney, and later as Gage County Judge, after serving in both World Wars — including with the Judge Advocate General's Department at General MacArthur's headquarters. Steve's father, Frank J. Mattoon, graduated from the University of Nebraska College of Law in 1949, moved 350 miles west to Sidney in 1950, and built an active trial and oil & gas practice that earned him fellowships in the American College of Trial Lawyers and the American College of Probate Counsel.
Steve — a third-generation Nebraska lawyer and Past President of the Nebraska State Bar Association — has carried that tradition forward in Sidney for more than four decades. Today Mattoon, Martens & Strommen is four attorneys strong, serving families, farms, and small businesses across Cheyenne County and the wider Panhandle with the same commitment his family has honored since 1925.
Four lawyers. One phone number.
Steven F. Mattoon
- Oil & Gas
- Real Estate
- Probate
- Estates
Senior partner practicing in Nebraska since 1976. Widely regarded as one of Nebraska's leading oil and gas attorneys, with extensive experience in real estate, probate, estate planning, and commercial development.
Kendra A. Strommen
- Municipal
- Oil & Gas
- Real Estate
- Estates
Managing partner since 2015. Counsel for municipalities, public power districts, and the Nebraska Inland Port Authority. Leading attorney in oil & gas title, mineral litigation, and real estate. Licensed abstractor.
Tanya M. Martens
- Estate Planning
- Estates
- Oil & Gas
- Real Estate
Partner and Attorney focused on real estate, estate planning, probate, and juvenile law. Also practices oil and gas law, representing clients before the Nebraska Oil and Gas Conservation Commission.
Jonathon Stellar
- Family Law
- Divorce
- Civil Litigation
- Contracts
Associate attorney practicing in Nebraska since 2012. Former prosecutor with extensive courtroom experience, now representing individuals and businesses in contract matters, family law, divorce, and civil litigation.
Four simple steps. No runaround.
We keep the process transparent so you know what happens after you press "submit."
You reach out
Use the form, call, or stop by. Tell us briefly what you're dealing with — no legal terms required.
We call you back
An attorney (not an intake clerk) calls within one business day. We'll schedule a free 30‑minute consultation.
We agree on a plan
You'll get a clear scope, a flat or hourly quote, and a written engagement letter before any billing starts.
We get to work
You always know where your matter stands. We update you in plain English, not Latin.
Trusted by families and businesses across the Panhandle.
"When our organization was researching the steps to starting a new nonprofit, we had a lot of questions about governance, bylaws, and making sure everything was set up correctly. MMM Law Office was incredibly knowledgeable and responsive throughout the entire process. They explained complex legal concepts in a way that was easy to understand. If you're starting a nonprofit or need legal guidance for an organization, I highly recommend this firm. Their expertise and professionalism made a challenging process much easier."
"We were overdue to create a Will and when mentioning this to the staff at the office they followed up immediately with available meeting times. The estate planning process was easy and affordable. We are grateful for the help we received from this team!"
"I have had countless experiences working with this law office, and they have all been outstanding. From setting up an LLC to writing my Will, the entire process from start to finish was always smooth, professional, and much less overwhelming than I expected. They take time to answer all of my questions, explain everything clearly, and make sure every detail is handled correctly. Their knowledge, responsiveness, and genuine commitment to helping their clients gives me confidence every step of the way. I truly feel like they care about the success of my business, not just completing the paperwork. I highly recommend this law office to anyone looking to start a business or needing legal guidance. Their expertise and exceptional customer service always make my experiences with them a positive one, and I wouldn't hesitate to work with them again."
- Cheyenne County Chamber of CommerceMember
- Cheyenne County Community CenterSupporter
- Cheyenne County Fair and 4‑HSponsor
- Future Farmers of AmericaSponsor
- Girl Scouts of the USASupporter
- High Plains Art CouncilSupporter
- Nebraska Petroleum Producers AssociationMember
- Night of HopeSponsor
- Pheasants ForeverSponsor
- Sidney Educational FoundationBoard service · scholarship support
- Sidney Legion BaseballSponsor
Kendra Strommen serves on the board of the Sidney Educational Foundation. The firm supports the Sidney Public Schools scholarship program through the Foundation fundraiser and an individual Mattoon scholarship.
"If you're going to hang a shingle in a town like this, you owe it more than your business hours."— J. Stellar
Answers before you pick up the phone.
Don't see your question? Call us at (308) 254‑5595
Can you help if I'm outside Sidney?+
Yes — we regularly represent clients from across the Panhandle, including Kimball, Potter, Chappell, and Bridgeport. Most matters can be handled by phone or an in‑person meeting.
I'm not sure which practice area my issue falls under.+
That's perfectly normal — and it's one reason a general practice makes sense for small‑town life. Call or fill out the form; we'll sort out where it belongs and, if we're not the right fit, refer you to someone who is.
How quickly will I hear back?+
Within one business day — usually much faster. We return calls the same day whenever possible. If your matter is urgent, say so in your message and we'll prioritize accordingly.
Get a straightforward conversation about your situation.
No pressure, no jargon, and pick whichever way works best for you - a telephone conference or an in-person conference.
Request a consultation