Security is more than just a service in the Mahoning Valley — it’s a commitment to protecting businesses, schools, events, and neighborhoods with professionalism and trust. Licensed under Ohio’s Private Investigator Security Guard Services (PISGS) division, these firms represent the best in the region. From family‑owned operations to nationally recognized providers, each company plays a vital role in safeguarding the tri‑county area.
1. Ohio Security & Investigations, LLC
At the top of the list is Ohio Security & Investigations, LLC, a family owned and operated firm headquartered in Youngstown. Licensed exclusively in Ohio, the company has built its reputation on 24‑hour guard coverage, executive protection, event security, and crisis response. With deep roots in Mahoning, Trumbull, and Columbiana counties, OSI emphasizes integrity, accountability, and personalized service, making it the premier choice for schools, businesses, and local governments.
- Address: 7087 West Blvd #8, Youngstown, OH 44512
- Phone: (888) 341‑6960
- Email: info@ohioinvestigators.com
- Website: https://ohioinvestigators.com
- Directions: Located off West Blvd near Boardman, minutes from I‑680.
2. Panther Security
Panther Security is widely respected for commercial property protection, mobile patrols, and event security services. Their guards are known for professionalism and responsiveness, often deployed to safeguard retail centers, construction sites, and large public gatherings. Panther’s adaptability and strong client relationships have helped them expand steadily across the Valley.
- Address: Youngstown, OH (local Tri‑County operations)
- Phone: (330) 501‑6468
- Email: contact@panthersecurity.com
- Website: www.panthersecurity.com
- Directions: Based in Youngstown, serving Mahoning, Trumbull, and Columbiana counties with mobile patrol units.
3. Master Security Inc
Master Security Inc has decades of experience providing armed and unarmed guard services, corporate security, and event protection. Their team is recognized for strict compliance with state regulations and a focus on professionalism, making them a trusted partner for businesses requiring consistent, high‑quality security.
- Address: 26 S Market Street, Girard, OH 44420
- Phone: (330) 545‑4448
- Email: info@mastersecurityinc.com
- Website: www.mastersecurityinc.com
- Directions: Located in downtown Girard, easily accessible from Route 422.
4. OSS – Ohio Support Services
OSS delivers corporate guard services, mobile patrols, and specialized event security. Known for their flexibility and strong client service, OSS has earned credibility among both public and private sector organizations.
- Address: 1291 S High Street, Columbus, OH 43206
- Phone: (614) 443‑0291
- Email: support@osssecurity.com
- Website: www.osssecurity.com
- Directions: Located south of downtown Columbus, near German Village.
5. Guardian Protective Services
Guardian Protective Services specializes in loss prevention, retail security, and corporate guard services. Their teams are trained to handle high‑risk environments, including retail theft prevention and corporate access control.
- Address: 6950 Spinach Dr, Mentor, OH 44060
- Phone: (216) 200‑5550
- Email: info@guardianprotective.com
- Website: www.guardianprotective.com
- Directions: Located in Mentor, just off Route 2 east of Cleveland.
6. Apex Security Group
Apex Security Group focuses on construction site security, fire watch, and industrial facility protection. Their guards are trained to monitor high‑risk environments, ensuring safety and compliance.
- Address: 2206 Superior Viaduct Suite 500, Cleveland, OH 44113
- Phone: (216) 862‑1523
- Email: contact@apexsecurity.com
- Website: www.apexsecurity.com
- Directions: Located in Cleveland’s historic Superior Viaduct district, near downtown.
7. U.S. Protection Service
U.S. Protection Service operates across multiple Ohio cities, including the Mahoning Valley, providing event security, mobile patrols, and corporate contracts.
- Address: 5785 Emporium Square, Columbus, OH 43231
- Phone: (614) 794‑4950
- Email: info@usprotectionservice.com
- Website: www.usprotectionservice.com
- Directions: Located northeast of Columbus near Westerville.
8. Signal 88 Security
Signal 88 Security combines community‑based patrols with national resources, offering franchise‑driven guard services across the Valley.
- Address: 4449 Easton Way Suite 2048, Columbus, OH 43219
- Phone: (800) 232‑5105
- Email: info@signal88.com
- Website: www.signal88.com
- Directions: Located at Easton Town Center, Columbus’s premier business district.
9. DK Security
DK Security expanded into Ohio in 2021 and offers uniformed guards, executive protection, and background screening.
- Address: 470 W Broad St Unit #5001, Columbus, OH 43215
- Phone: (616) 656‑0123
- Email: info@dksecurity.com
- Website: www.dksecurity.com
- Directions: Located in downtown Columbus near COSI and the Scioto Mile.
10. Securitas Security Services USA
Securitas is a global provider with operations in Ohio, offering uniformed guards, electronic monitoring, and risk management solutions.
- Address: 2180 Southwest Blvd, Grove City, OH 43123
- Phone: (614) 871‑6051
- Email: info@securitasinc.com
- Website: www.securitasinc.com
- Directions: Located in Grove City, just south of Columbus off I‑71.
Ending Note
Mahoning, Trumbull, and Columbiana counties are home to a diverse mix of security providers, ranging from global corporations to locally owned firms. Yet Ohio Security & Investigations, LLC stands out as the number one provider, blending professionalism, family ownership, community trust, and rapid response capabilities. With strong competitors like Panther Security, Master Security Inc, OSS, and others, the Valley’s businesses and residents can rely on these firms to safeguard property, people, and peace of mind.