Cybersecurity services
Cybersecurity services for every stage of an attack
ACS Cyber is the managed security services provider (MSSP) and cybersecurity division of Atlantic Computer Systems, with an in-house 24/7 SOC. We help small and midsize organizations prepare for attacks, monitor threats around the clock, contain active incidents and recover. We are headquartered in San Jose, California, with an office hub in Boston, supporting organizations nationwide.
- 24/7 security monitoring
- In-house SOC
- In-house forensic investigation
- Security and IT under one roof
Incident support, client or not
Have you been compromised?
If your organization has been hit by ransomware, phishing, Business Email Compromise, account takeover or a data exposure, call our 24/7 incident line at 1-650-300-7557. You do not need to be an existing client.
We contain the threat, find out what happened with in-house forensic investigation and work with your insurer, breach counsel and compliance obligations. Then we restore operations and help protect you so it does not happen again.
What we do
Six services that work as one program
Start with the service you need most. Each one connects to the others, so protection grows without adding vendors.
Managed Detection & Response
Our in-house SOC analysts monitor your endpoints, Microsoft 365, Google Workspace, cloud and network 24/7, and take pre-approved containment actions when a threat is confirmed.
- Managed EDR included
- Monthly report reviewed with you
Incident Response and DFIR
Call our 24/7 incident line, client or not. We contain the threat, investigate with in-house forensics and restore operations in a controlled way.
- Ransomware, BEC and account takeover
- Chain of custody and root-cause analysis
Cybersecurity Advisory and vCISO
Fractional security leadership that turns risk into a prioritized roadmap your leadership can fund and track.
- Risk assessments, policies and roadmaps
- Tabletop exercises and incident-response planning
Risk and Compliance
Gap assessments, remediation planning and evidence preparation for the frameworks your clients, regulators and insurers ask about.
- HIPAA, PCI DSS, SOC 2 and CMMC readiness
- NIST CSF 2.0 and CIS Controls alignment
Vulnerability Management
Continuous visibility into exploitable weaknesses, ranked by business risk, with remediation guidance and in-house penetration testing.
- External and internal scanning
- Penetration testing and retesting
Security Awareness Training
Practical training that helps your people recognize phishing, impersonation and payment fraud, with simulations that show progress.
- Phishing simulations and role-based training
- Business Email Compromise scenarios
Delivered across our services
Capabilities that span the program
Security assessments
A structured review of your identity, endpoint, email, backup and cloud controls, with findings ranked by business impact. Assessments often lead into advisory or readiness work. Atlantic Computer Systems, our parent company, outlines what a cybersecurity assessment reviews.
Microsoft 365, identity and email security
Hardening for Microsoft 365 and Google Workspace, including multi-factor authentication, conditional access, admin privileges and email authentication. MDR then monitors those identities and mailboxes.
Business Email Compromise prevention
Layered defenses against invoice fraud, payment redirection and executive impersonation, from mailbox monitoring to staff training. If a mailbox is already compromised, see our BEC response.
Business continuity and cyber recovery
Backup reviews, recovery planning and restoration support, backed by the IT operations of Atlantic Computer Systems, so you know what to restore first before you need to. Our parent company also provides managed cloud and backup services.
Prepare, protect, respond, recover
Where each service fits in the security lifecycle
01
Prepare
Understand your risk and build the plans you will rely on under pressure.
- Advisory and vCISO
- Risk and Compliance
- Security assessments
02
Protect
Reduce exposure and watch for threats around the clock.
- Managed Detection & Response
- Vulnerability Management
- Awareness Training
03
Respond
Contain, investigate and coordinate, starting with our 24/7 incident line.
- Incident Response and DFIR
- MDR containment
04
Recover
Restore operations and close the gaps an incident exposed.
- Cyber recovery
- Post-incident hardening
MSSP vs MSP
What is the difference between an MSSP and an MSP?
A managed service provider (MSP) runs your day-to-day IT. A managed security services provider (MSSP) protects it with 24/7 security monitoring, threat investigation and incident response.
| Area | MSP: managed IT | MSSP: managed security |
|---|---|---|
| Main job | Keeps technology running: helpdesk, devices, Microsoft 365 administration, cloud and networks | Protects that technology: 24/7 monitoring, investigation, incident response and risk reduction |
| During an incident | Restores systems and supports users | Contains the threat, investigates what happened and guides recovery |
| At ACS | Atlantic Computer Systems | ACS Cyber |
Because both sit in one organization, security fixes are carried through in the underlying IT instead of ending as a report. Learn about Atlantic Computer Systems.
FAQ
Cybersecurity services questions
ACS Cyber provides managed detection and response (MDR), incident response and DFIR, cybersecurity advisory and vCISO, risk and compliance readiness, vulnerability management with in-house penetration testing, and security awareness training. Security assessments, Microsoft 365 and email security, BEC prevention and cyber recovery are delivered through those services.
For managed IT, cloud and other day-to-day technology, see the business IT solutions of Atlantic Computer Systems, our parent company.
Start with your most pressing risk. If no one watches your systems after hours, start with managed detection and response from our in-house 24/7 SOC; if you need a plan for an audit or insurance renewal, start with a security assessment.
Call an incident response team before you wipe, restore or shut down affected systems. Our 24/7 incident line is 1-650-300-7557, non-clients included, and Have you been compromised? explains what happens next.
ACS Cyber is headquartered in San Jose, California, with an office hub in Boston, supporting organizations nationwide. To get started, book a free 30-minute consultation with a cybersecurity expert.
Next step
Build a security program that holds up under pressure
In a free 30-minute consultation, we review your environment, priorities and obligations, then recommend where to begin.