About NexusSec

Leading the future of enterprise cybersecurity with innovative solutions and unwavering commitment to protecting your digital assets.

Work With Us Read Our Story

Company Snapshot Active

15+

Clients Served

5+

Security Experts

3+

Years Experience

99.9%

Client Satisfaction

Mission Enterprise-grade protection made practical

Protect

Approach Security-first delivery with clear accountability

Deliver

Culture Innovation, collaboration, and trust

Build

Our Story

Built to democratize enterprise-grade cybersecurity.

Founded in 2023, NexusSec emerged from a vision to democratize enterprise-grade cybersecurity. What started as a small team of passionate security professionals has grown into a trusted partner for organizations across India.

We have helped companies across industries strengthen their security posture, from startups to large enterprises. That growth has been driven by a simple belief: every business deserves security work done to the standard a large enterprise would expect.

Impact

2023

Founded

India

Delivery reach

Startups

to enterprise clients

Security

as core architecture

Leadership

Technical leadership you can name.

Every NexusSec engagement is scoped and delivered under a single line of technical accountability. You will know who set the architecture standard, who is answerable for the findings, and who to call when something needs a decision.

S. Sridhar Thewar

CEO & Founder, NexusSec

S. Sridhar Thewar founded NexusSec in 2023 and sets its technical direction across VAPT and red teaming, next-generation firewall deployment, network architecture and segmentation, SD-WAN, and managed security.

His background is in enterprise network architecture and offensive security - defences designed from the perspective of someone who has spent years finding ways through them. He is a certified Sophos Firewall Architect, and NexusSec operates as a Sophos Silver Partner, an official Fortinet partner and a WatchGuard partner.

Clients work directly with the engineers delivering the engagement. There is no account layer between you and the people in your network.

Full profile and published guides →

Who we work with

Built for businesses that actually run a network.

We are specific about fit, because a security engagement that is scoped wrong wastes your budget and our time. Here is who we do our best work for - and who we will tell you to look elsewhere.

Where we fit best

Businesses in India running on-premise or hybrid infrastructure - offices, branches, a server room or a rack in a data centre.
Typically 25–500 staff, or smaller teams carrying disproportionate infrastructure: multiple sites, sensitive data, or uptime that costs money when it slips.
Organisations that have outgrown generic IT support and need engineering-level ownership of the network rather than ticket-closing.
In-house IT teams of one to five people who need specialist depth, not extra headcount.
Navi Mumbai, Mumbai and Maharashtra for on-site work; remote delivery across India.

When businesses call us

A firewall reaching end-of-life, or a renewal quote that does not match what you actually need.
A client, tender or auditor now requires a VAPT report.
A ransomware or phishing incident - yours, or one close enough to change the conversation.
A flat network where one compromised laptop can reach everything.
Opening a branch, warehouse or new office and needing the network designed properly the first time.
An MPLS contract expiring, with SD-WAN under evaluation.
Someone spoofing your domain in invoice fraud.
Inheriting an undocumented network after staff turnover, with no map and no rule-base history.

Where we are not the right fit

Home users and consumer antivirus support.
Buying a licence alone, with no deployment, configuration or handover.
Cloud-only or SaaS-only estates with no network or firewall footprint - our work is infrastructure-led.
Anyone who wants an automated scan exported to PDF to satisfy a checkbox, rather than to fix what it finds.
Lowest-bidder procurement where the scope has not been defined. We would rather help you define the scope first.

If you are not sure which side of this you fall on, ask. A short scoping call costs nothing and we will say so if the answer is no.

Mission and Values

Operating principles that shape every engagement.

These core values shape how NexusSec approaches every engagement, from technical execution to long-term client partnership.

Security First

We prioritize security in everything we do, ensuring our clients' digital assets remain protected against evolving threats.

Trust & Transparency

We build lasting relationships through honest communication, clear reporting, and complete transparency in our processes.

Innovation

We continuously evolve our methodologies and tools to stay current with how attacks actually work, and apply that to the networks we look after.

Collaboration

We work closely with our clients, understanding their unique challenges and tailoring solutions to their specific needs.

Why NexusSec

Reasons to build with us.

Work on real infrastructure, not slideware.
Continuous learning and certification opportunities.
Flexible work environment.
Competitive compensation and benefits.
Make a real impact on organizations' security.

Next Step

Turn the story into a working engagement.

If you want to work with NexusSec, scope services, review features, or discuss hiring, use the main contact flow and we will route it correctly.

Contact NexusSec View Services