IT Infrastructure for 30-100 Employees: Singapore Guide

For many Singapore SMEs, the 30-100 employee stage is when IT stops being "a few laptops and a router" and becomes business infrastructure. Staff expect stable Wi-Fi, cloud apps need reliable connectivity, finance needs predictable budgets, and management wants fewer disruptions.

The challenge is that infrastructure quotes can vary wildly. One proposal may be too light for a growing company; another may look like a mini data centre. This guide gives you a practical middle path for planning IT infrastructure services in Singapore - with cost ranges, caveats, and the decisions that matter most.

A practical baseline for 30-100 employees

At this size, most companies need seven layers working together:

1. Internet and network switching.
2. Business Wi-Fi.
3. Firewall and secure remote access.
4. Identity, access, and endpoint management.
5. Server, storage, cloud, or hybrid workloads.
6. Backup and recovery.
7. Implementation, documentation, and support.

You do not need to buy the largest version of every layer on day one. But you do need an architecture that can grow without being rebuilt every year.

Cost ranges by infrastructure layer

The ranges below are planning figures for typical Singapore office environments. They vary based on floor size, number of sites, cabling condition, vendor tier, warranty level, compliance needs, and whether the environment is new or being upgraded.

Treat these as budgeting bands, not a quote. A 40-person office with cloud apps and light file storage may sit near the lower end. A 100-person company with two sites, server workloads, compliance requirements, and high-availability needs can move quickly toward the higher end.

Layer 1: Network and switching

The network is usually where small compromises become daily complaints. A basic consumer switch may work for a 10-person team, but it will not give you proper segmentation, monitoring, PoE for access points, or clean growth.

For 30-100 employees, plan for:

• Managed switches with enough ports for users, printers, Wi-Fi, CCTV, phones, and meeting-room devices.
• VLANs for staff, guest Wi-Fi, servers, printers, and IoT devices.
• Redundant internet where downtime would stop work.
• 10G uplinks where servers, storage, or media files create heavy internal traffic.

The main mistake is buying only for today's headcount. Leave port capacity and uplink capacity for the next 24-36 months.

Layer 2: Business Wi-Fi

Wi-Fi sizing is not just coverage. It is density. A floor plan may look covered with three access points, but one packed meeting room can still create dropouts if too many users and video calls share the same radio capacity.

For Singapore offices, pay special attention to:

• Meeting rooms and training rooms.
• Pantry or collaboration areas where staff gather.
• Dense open-office seating.
• Neighbouring office interference in commercial buildings.
• Guest Wi-Fi separation from internal systems.

Cloud-managed Wi-Fi usually costs more upfront than basic access points, but it reduces troubleshooting time because your team can see client health, signal quality, and usage patterns remotely.

Layer 3: Firewall and secure access

A firewall for this size of business should do more than basic NAT. It should be sized for real throughput after security inspection is enabled, especially if the office depends heavily on cloud applications.

Look for:

• Security subscriptions that match your risk profile.
• Site-to-site VPN if you have multiple offices.
• Secure remote access for administrators and approved users.
• High availability if a firewall outage would stop operations.
• Logging that someone actually reviews.

For regulated or security-conscious environments, the firewall should be planned alongside endpoint hardening, identity controls, and backup. The government PKI case study is a useful example from Aggasys' own project set: the implementation covered Dell servers, Active Directory, network, and firewall components, with risk mitigation and hardening applied at every layer.

Layer 4: Server, storage, cloud, or hybrid

There is no single correct answer here. A 35-person professional-services firm running Microsoft 365, cloud accounting, and SaaS line-of-business tools may not need a physical server. A 90-person company with local applications, large files, or latency-sensitive workloads may be better served by a hybrid environment.

Use this quick rule:

• Cloud-first works best for light workloads, SaaS-heavy teams, and companies without large local data sets.
• On-premise can make sense for steady workloads, large files, low-latency needs, or predictable high utilisation.
• Hybrid is often the practical middle ground: identity, backup, files, or specialist workloads stay controlled, while collaboration and elastic services run in the cloud.

Aggasys' Azbil case study shows the other end of the spectrum: a resilient environment with a 4-node Hyper-V Storage Spaces Direct cluster across two server rooms, a 2-node SQL Server Failover Cluster, and automated failover. Most SMEs do not need that full architecture, but the principle is relevant: remove single points of failure where downtime would be expensive.

Layer 5: Backup and recovery

Backup is not complete until recovery has been tested. A backup product that sends a green email every night is useful, but the real question is: how quickly can the business return to work?

Define these before buying:

• What systems must come back first?
• How many hours of data can the business afford to lose?
• How long can each system be unavailable?
• Where is the off-site copy stored?
• Can backups resist accidental deletion or ransomware?
• Who runs the restore process after hours?

For 30-100 employees, a sensible baseline is 3-2-1 backup: three copies, two media or platforms, one off-site. Add immutable backup where ransomware risk is material.

Layer 6: Implementation and migration

Implementation is where the quote often looks expensive, but it is also where projects are won or lost. Good implementation covers discovery, design, configuration, migration, testing, documentation, and handover.

Plan for:

• Site survey and current-state documentation.
• IP plan, VLAN plan, firewall policy, and Wi-Fi design.
• Migration window and rollback plan.
• User communication for any downtime.
• Asset register and admin credential handover.
• Post-go-live monitoring.

In Aggasys' MOE SSOE 2 case study, the work was not just installing hardware. The project involved standardised server deployment, virtualisation, and integration across 360 schools within three months. The scale is much larger than an SME office, but the lesson is the same: repeatable standards and controlled deployment matter.

Layer 7: Ongoing support and maintenance

Infrastructure is not a one-time project. Switch firmware ages, certificates expire, firewall subscriptions renew, disks fail, and staff join or leave.

A practical support scope should include:

• Monitoring for servers, storage, network, and backup jobs.
• Patch management and firmware planning.
• User support and escalation.
• Quarterly health checks.
• Warranty and lifecycle tracking.
• Capacity review before performance becomes a complaint.

The SITA preventive-maintenance case study is a good reference point: Aggasys used monitoring, real-time email alerts, monthly health checks, and proactive patching to catch bottlenecks before they affected operations.

Three example budgets

These are simplified planning examples, not packaged prices.

35 employees, SaaS-heavy office

Likely setup: redundant internet, managed switching, 3-5 business access points, next-generation firewall, Microsoft 365 or Google Workspace, endpoint protection, cloud backup, and managed support.

Planning range: SGD 18,000-45,000 initial project, then SGD 1,500-3,500 per month for support and monitoring.

60 employees, hybrid office

Likely setup: segmented network, 6-10 access points, firewall with subscriptions, small virtualisation host or NAS, cloud collaboration, local file or app workloads, off-site backup, and formal support SLA.

Planning range: SGD 45,000-110,000 initial project, then SGD 3,000-6,000 per month for support, monitoring, and maintenance.

100 employees, multi-site or higher-resilience environment

Likely setup: redundant WAN, high-availability firewall, 10G switching where needed, 10-20 access points across sites, virtualisation cluster or hybrid cloud, tested disaster recovery, and more structured IT operations.

Planning range: SGD 100,000-250,000+ initial project, then SGD 5,000-10,000+ per month depending on SLA and operating scope.

Where SMEs usually overspend

• Buying enterprise hardware without a clear workload reason.
• Paying for cloud resources that run 24/7 but are lightly used.
• Replacing equipment before checking whether design or configuration is the real problem.
• Buying separate tools for backup, security, and monitoring that nobody manages.
• Paying for high availability on systems that do not need it, while leaving critical systems with single points of failure.

Where SMEs usually underinvest

• Wi-Fi density and proper site survey.
• Firewall throughput after security inspection is turned on.
• Backup recovery testing.
• Documentation and handover.
• Monitoring and preventive maintenance.
• Standardised identity, onboarding, and leaver controls.

A simple sequencing plan

If budget is tight, phase the work in this order:

1. Stabilise internet, firewall, switching, and Wi-Fi.
2. Standardise identity, MFA, endpoint protection, and device management.
3. Fix backup, off-site copy, and restore testing.
4. Review server, storage, and cloud workload placement.
5. Add monitoring, documentation, and preventive maintenance.
6. Plan lifecycle refreshes 12-24 months ahead.

This sequence gives the business reliability first, then security, then efficiency and resilience.

Final thought

Good IT infrastructure services in Singapore should not start with a product list. They should start with headcount, floor layout, workloads, risk tolerance, and the cost of downtime.

For a 30-100 employee company, the goal is simple: build enough structure that the business can grow without daily IT friction, but avoid the temptation to buy an enterprise architecture before the business case is there.

Aggasys designs, implements, and supports IT infrastructure for Singapore companies - from office networks and Wi-Fi to servers, storage, cloud, backup, and resilient hybrid environments. Book a consult with Aggasys and we will map the right architecture and budget range for your current stage of growth. Or call (+65) 6250 0045.