Granco Security

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About Granco Security Services

Granco Security Services was founded in 2010 by Corey Grant, who was inspired by his work as a Michigan Deputy Sheriff and a vision to create a security company that was different from the typical kind of firms commonly found in the private security industry. This vision lead Corey to build his company around our core values and three paramount guiding principles; Top quality service, professional training of his security guards, and caring for his customers by delivering what has been promised.

Corey's Role

Corey leads the development and growth of Granco Security, pioneering new ideas to address the ever-changing security needs for Businesses, Churches and Government entities. He manages the day-to-day operations of Granco Security which include the review and oversight of office administrators, supervisory command staff, security guards, ongoing security assignments, and the training department for our security guards.

Corey is a proud graduate of Madonna University in Livonia, Michigan. He holds a Bachelors of Science in Criminal Justice, with a minor in Psychology. He is also a MCOLES (Michigan Commission on Law Enforcement Standards) Certified Police Officer, NRA Certified Firearms Instructor, Defensive Tactics Instructor, and a Michigan Licensed Private Security Guard. He has received extensive training in the areas of Management, Policing in an Urban Environment, Police Administration, Police Operations and Patrol, Emergency Management, Church Security, and Executive Protection.

“Thank you for expressing interest in Granco Security Services. I hope that this site provides you with insight on the services we provide, as well as the philosophy’s that we embody while carrying out our assignments, in manners that are professional, effective, and swift.”

Corey D. Grant, President, Granco Security Services Signature
Corey D. Grant, President,
Granco Security Services
Granco Security President- Corey Grant Granco Security President - Corey Grant

About Us

We are a Christian, African-American Minority Owned, Licensed, Bonded and Insured, Michigan security guard company. Choose Granco Security for simply the best personal and commercial security services in the Detroit, Michigan, area. We are dedicated to keeping our clients safe and providing effective services that meet your needs without sacrificing professionalism or our values.

Our Core Values

  • Honesty - Always tell the truth.
  • Integrity - Always keep your promises.
  • Respect - Be courteous and treat others as they wish to be treated.
  • Servant Leadership - Care for our customers, our community and each other.
  • Perseverance - Try harder than our competitors and never give up.
  • Value - Do more for others than anyone else is doing.


We take providing security services very seriously, as we are responsible for the protection of our clients people, property, and assets. All Granco Security officers are required to wear professional uniforms, employ professional tactics, complete initial new hire professional training, annual continued qualification training, prepare professional daily activity logs, and represent our clients in a professional manner. Above all else, a good first impression ends with the security officer being an expert in keeping clients safe and giving precise directions within clients' buildings. Our security officers will report for duty on time ready for work, looking professional, enforcing all policies and procedures, dealing with everyday situations all while being helpful and focused on our clients specific needs.

Responsiveness & Dependability

These are two qualities that differentiate Granco from our competitors. Large security firms often lack responsiveness while smaller companies lack the resources necessary to provide effective and reliable security services. Granco's hands-on management team and command staff are structured to react quickly, knowledgeably, and effectively to any security challenge or concern. When choosing us, rest assured that our impeccable staff of security officers will deliver an unsurpassed level of quality, responsiveness, and dependability.

Be on your guard; stand firm in the faith; be courageous; be strong. – 1 Corinthians 16:13

Blessed are the peacemakers: for they shall be called the children of God. – Matthew 5:9


"The guards, staff, and service were excellent! Thank you!"
- Grosse Pointe, Michigan resident

"We had a great event! We hope to do it again soon. Love your staff!"
- Birmingham, Michigan Resident

"I could say many good things about Granco Security, but let me just say that we have finally found the right security company to work with! You guys are the right fit for us. You represent our church very well. Your guards are well-trained, polite, friendly but yet effective in their roles."
- St. Joseph Church, Detroit Michigan

"I used to use other companies until I met the staff at Granco Security. Since then I haven't worked with anybody else.Granco Security Company is an organization that puts the client first and I appreciate their professionalism."
- RJL Enterprises