Secure, resilient IT that just works — designed by an architect who has built it.
I'm Sharowar Jahan, a Senior Cloud & Infrastructure Solutions Architect with 19+ years designing enterprise cloud, network, virtualisation and security architectures across Australia and APAC. I help organisations modernise, harden and automate their technology — with practical outcomes, not shelfware.
Consulting services
Engage me for a focused assessment, a hands-on project, or as your fractional technical lead. Every engagement is vendor-neutral and tied to clear business outcomes.
Cloud Scaling & High Availability
Elastic, auto-scaling and highly available architectures on AWS and hybrid cloud — load balancing, multi-site resilience and capacity that grows with demand.
Migration Services
Planned, low-disruption migrations: on-premises to cloud, server and virtualisation platforms, data, email and websites — with backup, testing and rollback built in.
Linux Environments
RHEL, CentOS and Ubuntu administration, CIS-style hardening, patching and automation with Ansible and scripting, by a Red Hat certified engineer.
End-to-end System Solutions
Complete systems designed and integrated across server, storage, network, security and applications — one accountable architect from requirements to handover.
Cybersecurity & SOC
Security architecture, Zero-Trust, firewall hardening, SIEM/SOC design and detection engineering with Wazuh, Splunk and Suricata.
AWS & Hybrid Cloud
Cloud architecture, migration and cost optimisation across AWS, Azure and on-premises — secure landing zones, IAM and hybrid connectivity.
Enterprise Networking
LAN/WAN/WLAN and SD-WAN design, BGP/MPLS/OSPF routing, VPNs and multi-site modernisation with Cisco, Juniper, Palo Alto and Fortinet.
Virtualisation & DR
VMware vSphere/vSAN/SRM and Proxmox platforms, backup with Veeam/Acronis/AWS Backup, and RPO/RTO-driven disaster recovery.
DevOps & Infrastructure-as-Code
Terraform, Ansible and CI/CD pipelines (Git, Jenkins, GitHub) that make provisioning repeatable, auditable and fast.
n8n & AI Automation
AI-driven workflows that connect your apps, APIs and data — from SOC alert routing to back-office processes — so your team stops doing repetitive work.
Fractional IT Leadership
Technology strategy, roadmaps, vendor selection and backlog prioritisation from someone who has led technical services, infrastructure operations and company-wide technology strategy.
Monitoring & Cost Insight
Zabbix, Grafana, Prometheus, CloudWatch and Power BI dashboards for infrastructure health and cloud spend visibility.
Training & Workshops
Practical training in cloud, networking, cybersecurity, DevOps and automation to lift your team's capability.
Projects & case studies
Real engagements from my career. Client names are withheld for confidentiality; outcomes are as recorded in my professional history.
Multi-site hybrid cloud platform
Architected hybrid-cloud environments spanning AWS, Azure and on-premises for a portfolio of client sites.
- Delivered across 18+ client sites
- Outage windows reduced to under 5 minutes per month
- AWS–VMware hybrid platforms achieving 99.98% availability
SOC build & AI-assisted triage
Established SOC workflows and automated alert handling to speed up response and cut noise.
- Incident triage time lowered by 55%
- n8n AI-driven alert routing and automated log enrichment to reduce false positives
Multi-site LAN/WAN/WLAN & SD-WAN redesign
Redesigned enterprise networks with SD-WAN integration for multi-location organisations.
- Throughput capacity increased by 60% with lower latency
- 30% network efficiency gains for multi-location clients
Automated provisioning & CI/CD
Automated CI/CD, cloud provisioning and VM orchestration, plus operational scripting and n8n workflows.
- 70+ manual hours removed per month
- 50+ recurring manual processes eliminated
Modernisation programme for 40+ businesses
Modernised servers, networks and security systems, and deployed complete cybersecurity stacks.
- Uptime improved to 99.98% across managed services
- Firewalls, IDS/IPS, SIEM and EDR deployed; vulnerability backlog reduced within 6 months
Hardened hosting & app delivery platform
Built secure hosting with WAF, SSL, DMZ segmentation and application delivery, plus AWS workload management.
- External attack exposure reduced by 73%
- Data transfer costs lowered by 25%
VMware platform optimisation
Engineered vSphere/vSAN/HA/DRS/SRM platforms and large virtualisation clusters.
- Storage overhead costs reduced by 22%
- Hardware refresh costs cut by 30%
ISP backbone & government-grade data centre
Designed carrier-grade backbones and delivered data centre and cyber projects for government and defence clients.
- Network throughput boosted by 180 Gbps
- Tier-III aligned resilience and audit compliance
- Content delivery speeds up 55% via OTT CDN
Areas of mastery, proven in the field
19+ years of hands-on architecture and technology leadership across managed services, internet service providers, enterprise and government environments in Australia and APAC.
Enterprise Infrastructure
Data centre, server, storage and virtualisation platforms engineered for resilience — VMware vSphere/vSAN/HA/DRS/SRM, Proxmox, SAN/NAS and RPO/RTO-driven disaster recovery.
Cybersecurity & SOC
Firewalls, IDS/IPS, SIEM, EDR and Zero-Trust frameworks; SOC workflows with Wazuh, Splunk and Suricata.
Cloud & Hybrid
AWS and Azure architectures with secure hybrid connectivity and cost visibility.
Networks & Carrier-grade Routing
LAN/WAN/WLAN, SD-WAN and ISP backbones with BGP, MPLS, OSPF and DMVPN.
DevOps & AI Automation
Terraform, Ansible, CI/CD and n8n AI workflows that remove repetitive work.
Cloud Scaling & High Availability
Elastic, auto-scaling AWS and hybrid architectures with load balancing, replication and multi-site resilience.
Migration
Cloud, server, virtualisation, data, email and website migrations planned around minimal downtime, with snapshot/replication and tested rollback.
Linux Environments
RHEL, CentOS and Ubuntu administration, hardening and automation, backed by RHCE and RHCSA certification.
System Solutions
End-to-end design and integration of server, storage, networking and cybersecurity platforms, engineered to cut infrastructure lifecycle costs.
Technology Leadership
Technical strategy, architecture governance and team leadership at executive level.
Training & Mentoring
Practical workshops in cloud, networking, security, DevOps and automation.
Environments served
Capability matrix
| Capability | Strategy | Design | Build | Operate & automate |
|---|---|---|---|---|
| Cybersecurity & SOC | ● | ● | ● | ● |
| AWS & hybrid cloud | ● | ● | ● | ● |
| Enterprise & carrier networks | ● | ● | ● | ● |
| Virtualisation, storage & DR | ● | ● | ● | ● |
| DevOps & Infrastructure-as-Code | ● | ● | ● | ● |
| n8n & AI workflow automation | ● | ● | ● | ● |
| Cloud scaling & high availability | ● | ● | ● | ● |
| Migration (cloud, server, data, email, web) | ● | ● | ● | ● |
| Linux environments | ● | ● | ● | ● |
| End-to-end system solutions | ● | ● | ● | ● |
| Monitoring & analytics | ● | ● | ● | ● |
🎓 Bachelor in Computer Science & Telecommunications Engineering
Industries I serve across Australia
Practical technology and security consulting shaped around your sector, with designs aligned to the Australian frameworks that matter to you.
Managed service providers, telcos & ISPs
Carrier-grade routing, multi-tenant infrastructure, security operations and automation that scales your service.
Government & defence
Secure, resilient data centre, network and cyber architecture designed for audit and compliance.
Healthcare
Protecting patient data with hardened infrastructure, secure access and reliable backup and recovery.
Education & training
Reliable campus networks, cloud platforms and security for staff and students, plus practical IT upskilling.
Professional services
For accounting, legal and advisory firms: secure cloud, email and endpoint protection for confidential client data.
Multi-site businesses
Retail and multi-location organisations: SD-WAN, secure connectivity, central monitoring and automation across every site.
Framework references describe the standards solutions are designed to support; they are not formal certification or audit services.
Certifications
Industry-recognised credentials across cloud, networking, security and systems.
Solutions Architect
AWS Certified (Associate)
CCIE Written
Cisco (Security)
CCNP
Cisco Certified Network Professional
CCNA
Cisco Certified Network Associate
Cisco SCOR
Security Core Technologies
Certified Ethical Hacker
EC-Council
RHCE
Red Hat Certified Engineer
RHCSA
Red Hat Certified System Administrator
Palo Alto Networks
Multiple, incl. PCCSA
Fortinet NSE
Multiple, incl. NSE 4 FortiOS
Microsoft Azure
Fundamentals / Administrator
Juniper
JNCIA / JNCIS Security
Barracuda
CloudGen Firewall Professional
ICIP
Critical Infrastructure Protection
CISSP In progress
(ISC)²
Security+ & CySA+ In progress
CompTIA
Additional training: VMware, Linux administration, cloud security, DevOps, Generative AI, n8n and process automation.
n8n Ambassador
I'm proud to be an n8n Ambassador — helping businesses and the wider community adopt secure, AI-powered workflow automation. I'm also actively connected with many IT, cloud, cybersecurity and automation communities and groups, sharing knowledge, mentoring and staying on top of what's next.
A simple, low-risk engagement
Free consult
A short call to understand your environment, risks and goals.
Clear findings
Architecture and security review with prioritised, plain-English recommendations.
Hands-on build
Design, implementation and automation — documented and tested.
Handover & support
Knowledge transfer, training and ongoing advisory as you need it.
Ready to secure, modernise or automate your IT?
On-site across Queensland, remote Australia-wide, or hybrid. Tell me about your challenge and I'll come back to you with next steps.