Updated: May 11, 2026
Sentry Security Systems Low Voltage Contractor
Sentry Security Systems LLC, Columbia, Po Box 21832, Columbia, SC (Owned by: Mullis, Randy Ladon) holds a C 2 D Low Voltage license and 6 other licenses according to the Nevada license board.
Their BuildZoom score of 95 ranks in the top 22% of 79,084 South Carolina licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Sentry Security Systems LLC, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
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Sentry Security Systems LLC Contact Information
Phone Number: (803) 786-6333
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Address: P.O. Box 21832, Columbia, SC 29221
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Verified License
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Sentry Security Systems LLC License info
Verified License
| License # | 0077642 |
| Status | Active |
| State | Nevada |
| Type | C 2 D Low Voltage |
| Business Type | Limited Liability Company |
- BuildZoom verified this license was active as of February 2026.
Verify this license's status for Sentry Security Systems LLC at the Nevada State Contractors Board.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | S-EG13000510 |
| Status | Active |
| County | Sumter County |
| Type | Contractor |
| Business Type | Limited Liability Company |
- When BuildZoom last verified this license, it had an expiration date of August, 2022. Check the current license status of Sentry Security Systems LLC with the County of Sumter, FL
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 77642 |
| Status | Active |
| State | Nevada |
| Type | C-2d - Low Voltage |
| Business Type | Limited Liability Company |
- When BuildZoom last verified this license, it had an expiration date of July, 2017. Check the current license status of Sentry Security Systems LLC with the Nevada State Contractors Board
This is a sample of licensing data; click here to access a complete history.
Inactive License
| Status | Inactive |
| City | Dallas |
| Type | Building (Bu) |
| Business Type | Limited Liability Company |
- According to the City of Dallas, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| Status | Inactive |
| City | Dallas |
| Type | Building (Bu) |
| Business Type | Limited Liability Company |
- According to the City of Dallas, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | SENTRSS902ON |
| Status | Inactive |
| State | Washington |
| Type | Construction Contractor, Construction Contractor |
| Business Type | Limited Liability Company |
- According to the Washington State Department of Labor & Industries, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for Sentry Security Systems LLC at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | SENTRSS889O7 |
| Status | Inactive |
| State | Washington |
| Type | Electrical Contractor, Electrical Contractor |
| Business Type | Limited Liability Company |
- According to the Washington State Department of Labor & Industries, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for Sentry Security Systems LLC at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
95
BuildZoom Score
Insured
| Insurer | Scott Ins |
Bonded
| Bonded Agent | Philadelphia Indemnity Insurance Company |
| Bond Value | $2,000 |
Insured
| Workers Comp Provider | Scott Ins |
Sentry Security Systems LLC Employees
DS
Demao, Jack Steven
Managing Member
FL
Floyd, Leo Landon
LN
Leaphart, Nathan
Partner/Member
LI
Leaphart, Nathan Glenn Iii
Managing Member
ML
Mullis, Randy Ladon
Owner
NL
Nathan Leaphart
Partner/Member
NI
Nathan Leaphart Iii
Partner/Member
WM
Wesley, Mark Meadors
Managing Member