What We Do



Advisory Testing

We provide expert data security consulting and advisory services on seamlessly achieving compliance regardless of the industry standards your organization must meet. Including PCI DSS, HIPAA, HITRUST, CMMC, CCPA, GDPR, NIST 800-171, SOC 2, and more.



RSI Security offers a complete suite of IT security services that provide reliable, flexible, and scalable cybersecurity resources to mitigate threats, test for vulnerabilities, and monitor your networks. We create custom-tailored plans, combining technology and staffing resources.

RSI Security is dedicated to helping organizations achieve cybersecurity risk-management success.


Your Cybersecurity

cyber security

We work with some of the world's leading companies, institutions, and governments to ensure the safety of their data and their compliance with applicable regulations.

We also are a security and compliance software ISV and stay at the forefront of innovative tools to save assessment time, streamline compliance, and provide additional safeguard assurance. With a unique blend of software-based automation and managed services, RSI Security assists organizations within highly-regulated industries in managing IT governance, risk management, and compliance (GRC).
We customize and tailor our services to a client’s exact needs. This, combined with being predictive, preventative, and nimble is what sets us apart from any other organization in our industry.

Our team members come from a wide range of backgrounds and specialties. All consultants come from a computer science, engineering, or information systems discipline, and many consultants have obtained masters and doctorates. Our team members include published authors, open-source developers, industry researchers, and thought leaders.


Why choose RSI Security?

RSI Security is here as your trusted advisor in cybersecurity and compliance.


Concierge-level support and service at all times


Flexible pricing to accommodate revised budgets


Multi-industry and public sector experience


Strategic cybersecurity planning for evolving threats


Our Company

At RSI Security, we take great pride in presenting unbiased, independent, and in-depth security assessments. We don't have a conflict of interest when it comes to your security weaknesses. We find the best solutions that fit the needs of your organization and solve your unique concerns.

  • We take time to learn your business so we can best advise you.
  • We are continuously innovating, with cutting-edge tools and superior technology supported by patents.
  • We employ state-of-the-art equipment and techniques to perform thorough security tests.
  • We're active in the information security community, presenting seminars, writing articles, conducting webinars, and sharing our knowledge.

RSI Security has been helping organizations rethink their cyberdefenses for many years. We were established in 2013 on our founding members’ collective decades of experience in information technology and cybersecurity. RSI Security is a PCI-certified Qualified Security Assessor and Approved Scanning Vendor, a HITRUST External Assessor Organization, and a Certified Third-Party Assessor Organization recognized by the CMMC Accreditation Body. We work closely with legal, accounting, marketing, and other strategic partners to deliver comprehensive suites of services to our clients.

Core Values for Cyber Warriors

Serve above all else

Serve above all else.

Subordinating our individual interests to advance others and always providing value before expecting anything in return.

The right way is the only way

The right way is the only way.

Always act with integrity in every situation so people can move forward.

Commit to what you say

Commit to what you say.

Following through and delivering our assurances by going above and beyond, never less.

Stay hungry, humble and aware

Stay hungry, humble and aware.

Facilitate the growth of ourselves and the elevation of clients with the art of Shoshin.

Discipline creates freedom

Discipline creates freedom.

Remain deliberate and focused on the work of the mission to give people the freedom to operate and grow.


Our Company


John Shin


John Shin is the Founder and Managing Director at RSI Security and has over 18 years of Information Technology and Cybersecurity leadership experience working with industries across the board. He’s also the author of multiple research papers for the U.S. Air Force Research Laboratory and others.


Lindsey Duffin


Lindsey Duffin is the Operations Manager at RSI Security, working to help bring organization and efficiency to the day-to-day activities of the company. With over 10 years of experience in a myriad of industries, she has a passion for cutting out waste by establishing clear processes and procedures for the teams she works with.


Mohan Shamachar


Accomplished, business-goals driven, results-oriented professional with extensive knowledge, skills, and experience in Information Assurance, Information Security, Compliance, IT Program/Project Management.


Chad Martin


Chad Martin is the Technical Operations Manager at RSI Security with over 20 years experience of Information Technology and Telecommunications leadership experience in a variety of industries. He is passionate about leveraging technology and data to drive operational efficiency and business profitability. He is PMI CAPM and HDI SCM certified and will receive his Master of Information Systems in March 2023.


What our clients are saying

Peter Ripa
CEO of Century Club of San Diego Farmers Insurance Open

"We were looking for an IT partner who was both an ASV and QSA vendor with a long-term view of out organization's growing security needs. We were very pleased with the overall experience. I can sleep a little easier at night."

Dan Poloche
Director of Security and Compliance Fattmerchant

"RSI Security is a great QSA for advanced service providers that leverage technology such as tokenization. First time PCI Level 1 service providers would also benefit from their knowledge and personalized approach."

John Sterbinsky
Owner of a tax preparation company San Diego

"I was recommended to RSI Security by a fellow financial advisor. Their service was personal, quick, and thorough. I would recommend them to my financial colleagues."


Case Studies

Tilly’s Case Study

RSI Security

Power Digital Case Study

Meltmedia Case Study

WorkWave Case Study

Finix Case Study


Let's get started on creating a tailored cybersecurity plan to address your organization's specific needs.