Dahlcore Security Guard Services provides licensed armed and unarmed security officers across Long Island, New York — throughout Nassau County and Suffolk County, from Hempstead, Garden City, and Long Beach to Huntington, Islip, Riverhead, and the East End Hamptons. We serve Long Island from our Staten Island headquarters and Manhattan office, with rapid dispatch and site-specific post orders for businesses, residential communities, construction sites, industrial properties, and events. Founded in 2018 and led by Ian Dahlberg, who brings over 23 years of security experience, our veteran-owned team gives Long Island property managers, business owners, and event organizers a professional, accountable security presence — not a generic post from a distant call center.
Security Guard Services Across Long Island
Long Island’s security needs span two counties and every property type — the commercial density along Route 110 and Sunrise Highway, Nassau County office parks, Suffolk industrial and warehouse sites, residential communities and HOAs, and the seasonal demands of East End estates and event venues. Dahlcore builds each plan around the specific property, schedule, and risk profile, with written post orders before the first shift, so coverage fits your site rather than a one-size-fits-all package.
Towns & Communities We Cover
- Nassau County — Hempstead, Garden City, Mineola, Freeport, Long Beach, Rockville Centre, Valley Stream, Great Neck, Manhasset, Hicksville, Levittown, and Uniondale
- Western Suffolk — Babylon, Huntington, Melville, Brentwood, Central Islip, Islip, Bay Shore, and Hauppauge
- Central & Eastern Suffolk — Smithtown, Bohemia, Patchogue, Riverhead, and surrounding communities
- The East End & Hamptons — Southampton, East Hampton, Bridgehampton, and Montauk: estate, residential, event, and marina coverage
A real team, a real point of contact
Dahlcore serves Long Island from our Staten Island headquarters and Manhattan office, with officers who know the area. Long Island clients get dedicated account management — a named account manager, written post orders, and supervisor oversight behind every shift — and are never pooled anonymously with NYC operations.
Why Long Island Clients Choose Dahlcore
Licensed, accountable, and built around your property — Dahlcore protects Long Island businesses, communities, sites, and events.
Licensed & Background-Checked
Dahlcore is a licensed New York security guard agency (NY Department of State). Every officer is registered under New York’s Security Guard Act (General Business Law Article 7-A) with the NY Department of State’s Division of Licensing Services (NYSDOLS), thoroughly background-checked, and trained through DCJS-approved programs. Dahlcore is fully insured; certificates of insurance and credentials are available on request.
Veteran-Owned & Owner-Managed
Dahlcore is veteran-owned and operated — founded in 2018 and led by Ian Dahlberg, who brings over 23 years of security experience. The owner personally manages guards in the office and in the field, and officers are held to law-enforcement and military standards, with many bringing those backgrounds to their Long Island posts.
Trained & Technology-Supported
Officers complete New York’s required training (8-hour pre-assignment, 16-hour on-the-job, and 8-hour annual in-service through DCJS-approved programs), with up-to-date certifications and de-escalation training. GPS-tracked patrol tours and a real-time incident-reporting app give you a timestamped log of every checkpoint and action.
Local Accountability
Every account has a named account manager and a direct line to supervisory staff — not a subcontractor network or a call center — plus written post orders and regular supervisor check-ins. Each shift produces a daily activity report, and incidents are documented for your records and any law-enforcement follow-up.
Long Island Coverage Includes
Security Services We Provide on Long Island
Every Dahlcore service is available across Nassau and Suffolk Counties — as a standalone post or combined into one security plan. Explore any service for full details.
Armed Security Guards
NYS-licensed armed officers for high-value assets, financial institutions, and elevated-risk Long Island sites.
Unarmed Security Guards
Professional uniformed presence for retail, residential, office, and hospitality environments.
Residential & Estate Security
Lobby, gatehouse, and patrol coverage for communities, HOAs, gated properties, and East End estates.
Commercial Security
Access control, employee escort, and perimeter patrol for office parks and mixed-use properties.
Construction Site Security
24/7 coverage for Long Island job sites — equipment, materials, and contractor access.
Fire Watch Guards
Certified fire watch, compliant with FDNY and local Long Island fire codes, for outages and hot work.
Retail Security
Floor presence and deterrence for shopping centers and plazas along Route 110 and Sunrise Highway.
Mall Security
Patrol, crowd, and parking coverage for Long Island shopping centers and malls.
Access Control
Visitor management, badge verification, vendor check-in, and front-desk coverage.
Warehouse & Industrial
Gate, dock, and patrol coverage for Suffolk industrial parks and logistics facilities.
Event Security
Crowd management, access control, and staffing for events, weddings, and East End gatherings.
Executive Protection
Close protection for executives and public figures across Long Island and the metro area.
How Dahlcore Secures Your Long Island Site
A structured path from first call to on-site coverage — with rapid dispatch across Nassau and Suffolk.
Free Site Assessment
We walk your Long Island property, map access points and coverage gaps, and review your risks with you.
Site-Specific Post Orders
Written post orders define patrol routes, access procedures, escalation contacts, and reporting requirements for your site.
Officer Deployment
Background-checked, trained officers are briefed on your post orders and deployed — professional from the first shift.
Daily Coverage & Reporting
Patrols, access control, and incident response, with daily activity reports and GPS-verified tours delivered to you.
Supervision & Review
Your account manager and shift supervisors review logs and incidents, flag issues proactively, and adjust the plan as needs change.
Written post orders, verifiable coverage
You shouldn’t have to wonder whether a guard actually walked the site. With written post orders, GPS-verified patrol tours, daily activity reports, and a named account manager reviewing them, Long Island property managers, GCs, and business owners get the accountability and documentation they need — not a generic post and a hope.
Who We Protect on Long Island
From Nassau office parks to East End estates, Dahlcore serves the full range of Long Island properties and organizations.
Retail & Commercial
Shopping centers, plazas, and office parks along Route 110, Sunrise Highway, and across Nassau and Suffolk, with loss prevention and access control.
Residential & Estates
Residential communities, HOAs, gated properties, and East End estates needing gatehouse, patrol, and seasonal coverage.
Construction & Infrastructure
Active job sites across both counties needing 24/7 theft, vandalism, and access coverage plus fire watch.
Industrial & Warehouse
Suffolk industrial parks, logistics, and warehouse facilities needing gate, dock, and patrol coverage.
Healthcare & Office
Medical facilities, corporate offices, and mixed-use buildings needing controlled entry and professional coverage.
Events, Venues & Marinas
Corporate events, weddings, hospitality venues, and marinas needing crowd management, access control, and VIP coverage.
Long Island Security FAQ
Clear answers for Long Island property managers, business owners, and event organizers. For anything not covered here, call 212-208-0900.
Do you provide security guards on Long Island?
Yes. Dahlcore Security Guard Services provides licensed armed and unarmed officers across all of Long Island — throughout Nassau County and Suffolk County, including the East End and Hamptons — for businesses, residential communities, construction sites, industrial properties, and events. Request a free site assessment or call 212-208-0900.
Which Long Island towns and areas do you cover?
Both counties — in Nassau, communities including Hempstead, Garden City, Mineola, Freeport, Long Beach, Great Neck, and Hicksville; in Suffolk, Babylon, Huntington, Melville, Islip, Bay Shore, Smithtown, Patchogue, and Riverhead; and the East End, including Southampton, East Hampton, Bridgehampton, and Montauk.
Do you have a Long Island office?
Dahlcore serves Long Island from our Staten Island headquarters (1110 South Avenue) and our Manhattan office (250 Park Avenue), with Long Island-area officers and 24/7 dispatch. Long Island clients get dedicated account management and a named contact — not a call center — and are never pooled anonymously with NYC operations.
Are your Long Island guards licensed in New York State?
Yes. Dahlcore is a licensed New York security guard agency (NY Department of State), and every officer holds a valid New York State security guard registration under the Security Guard Act (General Business Law Article 7-A), issued through the NY Department of State’s Division of Licensing Services (NYSDOLS). Officers complete NYS-mandated training — 8-hour pre-assignment, 16 hours on-the-job, and 8 hours annual in-service — through DCJS-approved programs. You can verify any New York security registration through the NY Department of State’s public license lookup at dos.ny.gov.
Do you provide armed or unarmed guards on Long Island?
Both. Unarmed officers suit most retail, residential, office, and event assignments. Armed officers are available for high-value assets, financial institutions, and elevated-risk sites; they are licensed under New York’s pistol-license law (Penal Law §400) and complete annual firearms qualification. We advise on the right model at no charge during the initial consultation.
Does Dahlcore serve both Nassau County and Suffolk County?
Yes. Dahlcore provides security services throughout Nassau County and Suffolk County, including the East End and Hamptons communities, with the same staffing standards, licensing, and reporting applied across every Long Island location.
What types of Long Island properties do you serve?
Retail and shopping centers, office parks, industrial and warehouse facilities, residential communities and estates, construction sites, healthcare and medical offices, and event venues and marinas. Each gets a plan scoped to its risk profile and schedule.
How quickly can you start coverage on Long Island?
After a site assessment and post-order confirmation, coverage can begin quickly, subject to officer availability and site complexity. For urgent needs and coverage gaps, Dahlcore prioritizes rapid dispatch across Nassau and Suffolk — call 212-208-0900 and our 24/7 dispatch will discuss your timeline.
What Long Island Clients Say About Dahlcore
Below are example reviews — replace them with real feedback from your Google Business Profile and link each to its source.
“Dahlcore provided security for our construction site for several months. Officers were on time every shift, filed incident reports consistently, and communication was excellent throughout.”
“We hired Dahlcore for a corporate event. Their team handled access control and crowd flow professionally, and every guest commented on how organized and courteous the officers were.”
“Dahlcore has handled front-desk security at our medical office for over a year. Response to incidents is fast, reporting is thorough, and the officers represent our facility well.”
Get Security Coverage on Long Island
Contact Dahlcore for a free Long Island site assessment or urgent coverage. We walk your property, review your risks, and deliver a written coverage recommendation and post orders. Our team responds promptly — within one business day for standard requests, and 24/7 for emergencies.
Direct Contact
212-208-0900Serving Nassau & Suffolk · Guard dispatch 24/7
Office Hours: 8:00 AM – 8:00 PM · Guard dispatch available 24/7
Our Offices
1110 South Avenue, Staten Island, NY 10314
250 Park Avenue, New York, NY 10177
Staten Island · Manhattan · Brooklyn · Queens · The Bronx