About ACS Cyber
Making strong cybersecurity practical for small and midsize organizations.
ACS Cyber is the managed security services provider (MSSP) and cybersecurity division of Atlantic Computer Systems, with an in-house 24/7 SOC. We are headquartered in San Jose, California, with an office hub in Boston, supporting organizations nationwide. We help organizations prepare for attacks, monitor threats around the clock, respond decisively and recover with confidence.
At a glance
Company facts
The essentials about ACS Cyber in one place.
| Fact | Details |
|---|---|
| Name | ACS Cyber |
| What we are | ACS Cyber is the managed security services provider (MSSP) and cybersecurity division of Atlantic Computer Systems, with an in-house 24/7 SOC. |
| Parent company | Atlantic Computer Systems (ACS), a managed IT and cybersecurity company |
| Managed IT | Provided by Atlantic Computer Systems: helpdesk support, Microsoft 365 administration, cloud, networks, VoIP and IT logistics |
| Headquarters | San Jose, California |
| Office hub | Boston, Massachusetts |
| Service area | Nationwide, remote-first |
| Security operations | In-house 24/7 SOC |
| Incident response | 24/7 incident line 1-650-300-7557, open to non-clients; in-house forensic investigation |
| Services | Managed detection and response, incident response and DFIR, cybersecurity advisory and vCISO, risk and compliance readiness, vulnerability management and penetration testing, security awareness training. See all services. |
| Who we serve | Small and midsize organizations, including healthcare, legal, accounting and financial services, professional services, multi-location businesses and regulated organizations. See industries. |
| How to start | A free 30-minute consultation with a cybersecurity expert, or call 1-650-300-7557 for an active incident |
Mission
Our mission and security philosophy.
Our mission is to give small and midsize organizations the security capabilities they need without asking them to build a security department: continuous monitoring, decisive incident response and clear security leadership, delivered by people who understand how a business runs.
We believe security is an operating discipline, not a product. Tools matter, but outcomes depend on the people who watch them, the decisions made under pressure and the follow-through afterward.
That is why we lead with human investigation, explain risk in business language and stay involved after the report is delivered.
We also believe good security should be understandable. If leadership cannot explain why a control exists or what a report means, the program is not doing its job, and we work to change that.
Clear guidance. Decisive response. Stronger security.
Our brand promise shapes every engagement.
- Clear guidance: recommendations explained in business language and prioritized by risk
- Decisive response: human-led investigation and containment when it matters
- Stronger security: a program that improves with every review and every incident
How we operate
Operating principles.
These principles guide how we monitor, advise and respond, and how we handle the information you trust us with.
01
Investigate before we escalate
Our in-house SOC analysts validate activity before raising it, so the alerts that reach you carry context and a recommended next step.
02
Act within agreed rules
When a threat is confirmed, our SOC analysts take pre-approved containment actions, such as isolating a device or disabling an account, under rules agreed with you in advance.
03
Explain risk in business terms
Every recommendation states what it protects, the effort involved and what happens if it waits, so leadership can make informed decisions.
04
Own the outcome
We take responsibility for follow-through, from the first alert to remediation and the lessons that come after.
05
Fit the environment
Controls have to work with your actual technology, people and processes. We design for adoption, not just for the checklist.
06
Handle information carefully
We treat client information as sensitive by default. During incidents we document evidence handling with chain of custody, and we never ask anyone to send passwords or sensitive records by email or through our website.
07
Keep improving
Each review, incident and trend becomes input to your roadmap, so the program gets stronger over time instead of standing still.
Our parent company
Part of Atlantic Computer Systems.
ACS Cyber is the cybersecurity division of Atlantic Computer Systems. The division focuses entirely on security: 24/7 monitoring from our in-house SOC, incident response, advisory, compliance readiness, vulnerability management and awareness training.
Atlantic Computer Systems provides managed IT, including helpdesk support, Microsoft 365 administration, cloud, networks, VoIP and IT logistics. That gives our security work a practical foundation: when we find a weakness, the fix can be carried through in the underlying IT. Atlantic Computer Systems sets out its security and privacy commitments on its trust page.
What the relationship means for you
- A security team that understands day-to-day IT operations
- Remediation support, not just a list of findings
- One accountable relationship across security and the systems it protects
- Direct access to knowledgeable security and technical professionals
Services
Service coverage.
Six services cover the full security lifecycle, from preparation through recovery. You can start with one and add others as your program matures.
Managed Detection & Response
24/7 security monitoring and human-led investigation from our in-house SOC, with ACS-managed EDR and pre-approved containment.
Incident Response and DFIR
Containment, in-house forensic investigation and recovery when an incident occurs, with a 24/7 incident line open to non-clients.
Cybersecurity Advisory and vCISO
Fractional security leadership, risk assessments, policies and security roadmaps.
Risk and Compliance
Readiness, control alignment and remediation for HIPAA, PCI DSS, SOC 2, CMMC and cyber-insurance requirements.
Vulnerability Management
Scanning, risk prioritization, in-house penetration testing and validation after remediation.
Security Awareness Training
Training and phishing simulations that help your people recognize and report threats.
Who we serve
Who we work with.
Our clients range from organizations with no security staff to those with capable IT teams that need specialized support. What they share is a need for security that is dependable, understandable and sized to the business.
- Small and midsize businesses without an internal security operations team
- Organizations with internal IT that need specialized security support
- Healthcare and medical organizations
- Legal, accounting and financial services firms
- Professional-services and multi-location businesses
- Organizations that run on Microsoft 365 or Google Workspace
- Organizations preparing for HIPAA, PCI DSS, SOC 2, CMMC or cyber-insurance requirements
- Organizations recovering from ransomware, account compromise, phishing or Business Email Compromise (see how we help after a compromise)
Questions
Questions about ACS Cyber.
ACS Cyber is the managed security services provider (MSSP) and cybersecurity division of Atlantic Computer Systems, with an in-house 24/7 SOC.
Atlantic Computer Systems (ACS) provides managed IT, including helpdesk support, Microsoft 365 administration, cloud, networks, VoIP and IT logistics. Read more about our parent company.
ACS Cyber is headquartered in San Jose, California, with an office hub in Boston, supporting organizations nationwide.
We are remote-first, so we can monitor, investigate and advise wherever your organization operates. For local IT support, Atlantic Computer Systems, our parent company, offers managed IT services in San Jose and managed IT in the Boston area.
ACS Cyber provides managed detection and response from an in-house 24/7 SOC, incident response and DFIR, cybersecurity advisory and vCISO, risk and compliance readiness, vulnerability management and penetration testing, and security awareness training.
Our own team. The 24/7 SOC behind managed detection and response is in-house, forensic investigation during incidents is performed in-house, and penetration testing is performed in-house.
Atlantic Computer Systems provides managed IT, such as helpdesk support, Microsoft 365 administration, cloud, networks, VoIP and IT logistics. ACS Cyber is its cybersecurity division and focuses on monitoring, incident response, advisory and compliance readiness.
You can work with ACS Cyber alongside your current IT provider, or with both parts of ACS. Learn about Atlantic Computer Systems.
For an active incident, call the 24/7 incident line at 1-650-300-7557; non-clients can call too. For planning and questions, book a free 30-minute consultation on our contact page.
Contact
How to reach us.
Active incident: call our 24/7 incident line at 1-650-300-7557. Calling first lets us start triage while you are on the line. See Active Incident Support for practical first steps.
Think you have been compromised? See how we help after a compromise, from containment and investigation to insurer coordination, recovery and prevention.
Planning and questions: book a free 30-minute consultation with a cybersecurity expert at a time that suits you, or visit our contact page.
ACS Cyber is headquartered in San Jose, California, with an office hub in Boston, supporting organizations nationwide.
Before you reach out
- For an active incident, call the 24/7 incident line first
- For planning, assessments or questions, book the free consultation
- Do not send passwords, logs or evidence files by email; we arrange secure handling once engaged
Free 30-minute consultation
Talk with the team behind ACS Cyber.
Tell us about your environment and priorities. We will help you understand your risk and the most sensible next step for your organization.