Ajay Parihar

Senior Cybersecurity Architect

4 recommendations

Salary / Daily rate

4 people recommend

Berlin, Germany

Freelance

Remote only

Skills

CybersecurityHTMLPythonAWS LambdaGitGitLabAmazon EC2DockerAWSSnort

Languages

English

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About me

Intro

Cybersecurity Architect with 15+ years protecting enterprise networks at Cisco, T-Mobile, and Delivery Hero. Expert in endpoint security, SIEM implementation, and AWS cloud security with proven track record of reducing deployment times by 60%. Specialized in building secure applications and infrastructure solutions that enhance organizational security posture.

Links

Work experience

Freelance

CyberraxhaFreelance

Aug 2025 - Present

1 year 3 months

Building applications for consumer security enhancement. Tech: React, node.js. mongodb, AWS, AI, n8n, Gitlab, devsecops, firebase

Sr. Security Engineer

IDnow

Feb 2023 - Jul 2025

2 years 6 months

Berlin, Germany

Microsoft intune-- Deployment, Mac, Linux, Windows, Azure AD, conditional access, Microsoft Defender. Purview -Basic DLP config sonarqube, wazuh siem, Pentesting: burpsuite, Kali VA: Nessus, Firewall:fortigate AWS.

Senior Infrastructure Security Engineer

Delivery Hero

Apr 2020 - Dec 2022

2 years 9 months

Sentinelone, endpoint security, bit defender

WORKED ON STARTUP

CyberChainAI

Jan 2018 - Jan 2020

2 years 1 month

Worked on a couple of ideas around AI for IT operations and health tech o Meeting with Investors o Solution designing o Pitching o Hinance Management Tech skills: Datascience, IT Security, Product Management, Marketing, AWS Languages: Python, R Programming proQects: o 9uilt solutions to collect data via API for twitter for cyber security news and apply o NLP to check new vulnerabilities disclosed in the market. o Solutions related to blockchain and security. Went to Paris( Malta blockchain conferences. o Stock market analysis using python-pandas

Senior Network Security Engineer

T-Mobile

Mar 2014 - Aug 2018

4 years 6 months

o Lead a team of coders to design solutions that help to improve the network by building applications o Hor reducing downtime, automate manual tasks, root cause analysis, create data analytics applications using network data ProQects: o Create network map to /nd the route and helping in troubleshooting o Kealth check application to /nd top application with issue using splunk to provide better application uptime. o DNS monitor to /nd top attacks and top talkers and cleaning the DNS rogue reYuests o Change management to correlate network changes to outage to /nd root cause faster using Splunk dashboard 201q-16 o Worked as a Senior Engineer in the network security team supporting diJerent technologies like Hirewall, IPS, VPN, Load 9alancing, DNS, DKCP, AAA, Web Gateway, IDS. o Troubleshooting P1 network issues, application issues behind load balancers etc. Vendors: Checkpoint Hirewall, Cisco ASA ’ VPN, H5 and A10 load balancer, McAfee- IDS, Web Hiltering, Infoblox-DNS & DKCP, Cisco ACS, ISE authentication, Symantec VIP-2 factor authentication, Cisco ’ ni/ed wireless infra WLC, 3500 Access Points Software Tech: SFL, Python, datatable, tableau, Splunk, Machine learning Network Tech: Cisco Prime, KPNA, Splunk, Extrahop, Wireshark, SevOne, Cacti, Granite

Network Consulting Engineer

Cisco

Aug 2010 - Jan 2013

2 years 6 months

As part of a Consulting team worked on designing, developing new solutions that can be sold as a service to Service Providers. The solution-driven to provide capability to the Service Provider in deploying, manage & monitor Cisco devices using automated tools for provisioning & management. Some of the daily responsibilities: o Work with the account team on sales opportunities and demonstrate Cisco Services capabilities to provision, operate the devices. o Working with the SOC to onboard new customers, integrate devices to SIEM and monitoring Infrastructure. o Due Diligence of partner provisioning tools that provides Uero touch provisioning, automation capabilities. o Creating new service portfolio that can be sold as a service with devices. o Building POC environment that can be used for demonstrating tool(device capabilities. o Creating requirements for product enhancement for adding new service, device support. Solution included: o Security services like Firewall, IPS, content /ltering for diJerent market segments like Service Provider, Enterprise, 9ranches, Small business. o Vulnerability assessment, Log monitoring through different toolsets like Novell Sentinel, Fualys, Splunk. o Created requirements for features to be con/gured on the devices from the automated tool, KPI s to be monitored by the NMS

Security Engineer

HCL Comnet Ltd

Aug 2008 - Jul 2010

2 years

Worked as a Security Analyst in the Global SOC of HCL managing and monitoring infrastructure of S based Clients. Responsibilities:- o Managing Cisco Firewall, Checkpoint, Symantec Mail Security for SMTP and RSA o Configuring Site-Site, Remote Access VPN, Security Context, failover on Cisco ASA o Configuring VPN Site-Site, Remote Access over Nortel with authentication using RSA token for Remote Access. o Working on Documentation for ISO 27001 Audit and presenting it to the Auditor o Incident Management and configuration of correlation rules and monitoring using Netforensics SIEM o Hardening the Firewall and increasing the security through ACLs o Responsible for troubleshooting VPN )Site to Site and Client to Sitej, RSA and SPAM related issues over the phone(email. o To conduct(participate in weekly Customer Review Meeting to discuss the various networking equipment s performance and providing the uptime and downtime reports to the customer as reYuired by the Customer. o Creating(updating Work Instructions for standard procedure to be followed.


Education

IILM

Bachelor of Technology - BTech

2004 - 2008

4 years 1 month

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