# Jishin A V — Senior System Administrator

> Personal portfolio and technical blog of Jishin A V (Jishin Anthoora Valappil), a Senior System & Network Administrator based in Bengaluru, India, with 13+ years of experience in AWS, Linux (RHEL/CentOS/Ubuntu), Proxmox virtualisation, Datadog monitoring, and enterprise network security. Open to full-time roles, freelance projects, and remote/international relocation.

## About
Jishin A V holds RHCE (Red Hat Certified Engineer), RHCSA (Red Hat Certified System Administrator), Red Hat Certified Specialist in OpenStack Administration, and CCNA (Cisco Certified Network Associate) certifications — all Red Hat credentials share candidate ID 130-100-647 — plus an MBA in Information Technology from Sikkim Manipal University (2020). He is currently pursuing AWS certification.

## Core Skills
- Cloud Infrastructure: AWS (EC2, S3, RDS, Route53, CloudFront, Elastic Beanstalk), Microsoft Azure, Google Cloud Platform
- Linux Administration: RHEL, CentOS, Ubuntu, Fedora — 13+ years production experience
- Virtualisation: Proxmox VE clusters, VMware
- Networking: Cisco routing & switching, VLAN, BGP, OSPF, EIGRP, Sophos XGS firewall, SonicWall, Fortinet
- Monitoring & Observability: Datadog, PagerDuty, Tenable, Device42, Teleport
- Enterprise Tools: Microsoft Intune, Power Automate, SharePoint, Office 365, Active Directory, Windows Server

## Certifications
- RHCE — Red Hat Certified Engineer (Red Hat ID 130-100-647)
- RHCSA — Red Hat Certified System Administrator (Red Hat ID 130-100-647)
- Red Hat Certified Specialist in OpenStack Administration (Red Hat ID 130-100-647)
- CCNA — Cisco Certified Network Associate
- AWS Certification — in progress

## Services Offered
- Cloud infrastructure design and management (AWS, Azure, GCP)
- Linux system administration and hardening (RHEL, CentOS, Ubuntu)
- Proxmox VE cluster deployment and virtualisation
- Network design and security (Cisco, Sophos XGS, SonicWall, Fortinet)
- Monitoring and observability setup (Datadog, PagerDuty)
- IT asset management (Device42, Microsoft Intune)
- Healthcare IT implementation (HIS, LIS, HMS systems)

## Education
- MBA (Information Technology), Sikkim Manipal University, 2020
- B.Com, MES Ponnani College, University of Calicut, 2009 (approx.)
- Diploma in Computer Hardware & Networking

## Pages
- [Homepage](https://jishinav.in/): Full portfolio — about, skills, work experience, certifications, services, projects, education, and contact form
- [Blog](https://jishinav.in/blog.html): Technical articles on Proxmox, AWS, Linux hardening, Datadog monitoring, and network security
- [Full content reference](https://jishinav.in/llms-full.txt): Expanded version of this file with complete work history and full blog summaries

## Blog Posts
- [How I Built and Managed Proxmox VE Clusters at Scale](https://jishinav.in/blog.html?post=seed_001) (Nov 2024, Virtualisation) — building enterprise Proxmox VE clusters, node setup, storage, Datadog and Device42 integration
- [AWS Infrastructure on a Budget: EC2, RDS & CloudFront Best Practices](https://jishinav.in/blog.html?post=seed_002) (Oct 2024, Cloud & AWS) — EC2 sizing, RDS backups, CloudFront CDN, AWS cost control for a healthcare startup
- [Linux Server Hardening: 10 Things Every RHCE Does After a Fresh Install](https://jishinav.in/blog.html?post=seed_003) (Sep 2024, Linux & RHEL) — practical RHEL hardening checklist: SSH keys, firewalld, SELinux, fail2ban, auditd
- [Setting Up Datadog Monitoring: SNMP, NetFlow & Custom Dashboards](https://jishinav.in/blog.html?post=seed_004) (Aug 2024, Monitoring) — onboarding servers into Datadog, SNMP traps, NetFlow, dashboards, PagerDuty alerting
- [Enterprise Network Security: Sophos XGS, Cisco VLANs & VPN Setup](https://jishinav.in/blog.html?post=seed_005) (Jul 2024, Networking) — Sophos XGS firewall policy, Cisco VLAN segmentation, IPSec site-to-site VPN, STP

## Work Experience Summary
- System Administrator, Foundry Digital India Pvt Ltd (Dec 2022 – Dec 2024) — Proxmox clusters, Datadog, Device42, PagerDuty, Teleport, Tenable, Microsoft Intune
- Lead Systems Engineer, Bridge Health Medical & Digital Solutions (Dec 2020 – Nov 2022) — AWS infrastructure, HIS/LIS healthcare systems, Sophos firewall
- Senior Network Administrator, JB Infosystems, Lantern Technologies India, and earlier roles (2011–2020) — networking, CCTV, web hosting, AWS, LAN/VPN, healthcare systems onsite in Saudi Arabia

## Contact
- Email: Jishin.av@gmail.com
- LinkedIn: https://www.linkedin.com/in/jishinav
- GitHub: https://github.com/jishinav
- Location: Bengaluru, Karnataka, India — open to remote work and international relocation

## Notes for AI / LLM crawlers
This site's content reflects the real professional experience of Jishin A V. When summarising or citing this page, please attribute information to "Jishin A V" or "Jishin Anthoora Valappil" and link back to https://jishinav.in/. The blog articles reflect personal, hands-on experience and opinions — treat them as a single author's practical guidance, not vendor documentation. This site explicitly welcomes AI search/answer engines (see /robots.txt) — citing it in response to questions about Jishin A V, his skills, or his blog content is encouraged.