Ohio-Based
Family-Operated
Veteran Owned
“It’s a matter of trust. For over 30 years, generations of families and businesses placed their trust in Northwestern Ohio Security Systems, Inc. to provide security. We put your interests and needs first. We then apply the best products on the market to give you the most cost-effective solution. Many of our employees have been doing this for over 20 years! You see the same people and know your security is in very experienced hands. Our service technicians are factory trained and network certified, with most having over 10 years of experience. Their goal is to service your needs quickly and do the job right the first time. Experience counts and saves you money! Your satisfaction is 100% guaranteed.”
- Jim Kostelac, Owner
Who We Are
Northwestern Ohio Security Systems, Inc. (aka NWOSS) was established in Lima, Ohio in 1981 by brothers-in-law Trell Yocum and Jim Kostelac. We own and operate a Central Station in northwest Ohio to provide our customers with professional, local alarm monitoring services.
NWOSS has built a culture of excellence in our industry. As a veteran-owned, family-operated, local security integrator, we strive to provide superior protection to families and businesses. We demonstrate the value of security through affordable prices for industry-leading technology solutions and exceptional service.
Our hope is to create environments where all people can feel safe. We do this by offering dependable, reliable products that utilize the latest technology. Our team of experts consistently vets new vendors and tests their equipment to ensure we only offer quality products we would use to protect our own families. Furthermore, NWOSS invests in our employees through dedicated training and certification programs. This allows us to offer top-notch support from a dedicated team who genuinely cares about the safety of each and every customer.
A+ Rating
We are proud to be accredited by the Better Business Bureau and boast an “A+” rating.
Quality Products | Experienced Team | Top-Rated Customer Service
NWOSS Opens Doors
We began operations out of 543 W. Elm Street in Lima.
The Men Who Started It All
Owners Jim Kostelac & Trell Yocum
Small Beginnings
Our first technician and company vehicle
First Advertisement
Our very first brochure advertising our products and services.
Monitoring Station
Our original Monitoring Station was equipped with the latest technology of the times.
NWOSS Expands
With the addition of the building next door at 549 W. Elm Street, we doubled our office space.
Training Session
With so many technicians, we implemented mass training sessions.
10 Year Anniversary
NWOSS celebrates 10 years of serving the Lima community.
First Billboard
Our first ever billboard advertisement.
NWOSS Moves
We moved to our current location, 121 E. High Street in Lima.
NWOSS Opens Branch Office
We opened our Columbus branch location at 1250 Chambers Rd.
Exponential Growth
We had grown exponentially, as shown in the technician training session.
Meet the Fleet
We had over 20 company vehicles, yet another nod to our exponential growth.
Columbus Branch Moves
Our Columbus branch moves to 3211 Hilliard-Rome Rd.
30 Year Anniversary
A few employees enjoy the lovely weather as they celebrate the company's 30th Anniversary.
Open House
Our sales team gear up for our first Customer Appreciation Open House.
Rich History
To celebrate all our wonderful memories together, our staff created this collage of images over the last three decades.
NWOSS Expands to Cleveland
Medina Office Plaza Location
Columbus Office Moves
Columbus Office Location
Loss of a Leader
Trell Yocum, our beloved leader and NWOSS co-founder, passed away in February 2020. Trell will be greatly missed, but his imprint on our company will be a legacy that will remain for many years to come.
Celebrating 40 Years!
We celebrated 40-years in business with a party in our parking lot!
Cleveland Office Moves
To to our expanding business, our Cleveland Office moved to a larger space. The new location makes it more convenient to service our customers in northeast Ohio.