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Security Research Engineer

Cisco Systems, Inc.
$101,500.00 to $144,500.00
life insurance, vision insurance, parental leave, paid holidays, sick time, 401(k)
United States, Colorado, Denver
Jul 17, 2026
The application window is expected to close on: 07/21/2026

Job posting may be removed earlier if the position is filled or if a sufficient number of applications are received.

Meet the Team

Our security team is dynamic, hardworking, fun, and high-energy, but the work is done in a very casual environment that strongly encourages a work/life balance. Not only will you work alongside a team of skilled security researchers with a diverse spectrum of talents and experience levels, but you will also be interacting with a variety of engineering teams across Cisco. Cisco ASIG cultivates an environment where every individual's input and experience is valued. We prioritize training sessions and a mentor program surrounding you with the resources you will need to succeed.

Your Impact

As a team member of Cisco's Advanced Security Initiatives Group (ASIG), you will evaluate our global products and services to identify security vulnerabilities, weaknesses, and improvements.

  • Learn to adopt an attacker mentality using tools, techniques, and processes that emulate real-world adversaries.

  • Work with amazingly creative, innovative, and collaborative security researchers to develop evolving ethical hacking skills and networking product knowledge.

  • Partner with Cisco's industry-leading engineering teams to assess the latest system and application architectures, contribute to creative security solutions, and gain unparalleled access to and experience with the latest technologies.

  • Opportunities to research security topics independently or collaboratively to explore and develop tools and ideas as part of our "Free Friday" innovation and incubation process.

Minimum Qualifications
  • 2+ years of software engineering experience with C, C++, Perl, Raku and Python/Ruby, with experience in secure coding/development and code analysis for vulnerabilities

  • 2+ years of experience with network protocols through implementation or analysis

  • 2+ years of security testing experience, including areas like web applications, APIs, user interfaces, and embedded devices

  • 2+ years of BSD Unix experience with an intermediate understanding of security hardening configurations and capabilities

  • Experience with operating system concepts in the areas of memory management, computer architecture, or binary analysis

Preferred Qualifications
  • 2+ years of experience with applied crypto, through implementation or analysis of crypto algorithms

  • 2+ years of experience as a DevOps engineer, with a focus on DevOps security

  • OSCP or other industry certifications are a plus

  • Secure development practices

  • Security of virtualization platforms and techniques

Why Cisco?

At Cisco, we're revolutionizing how data and infrastructure connect and protect organizations in the AI era - and beyond. We've been innovating fearlessly for 40 years to create solutions that power how humans and technology work together across the physical and digital worlds. These solutions provide customers with unparalleled security, visibility, and insights across the entire digital footprint.

Fueled by the depth and breadth of our technology, we experiment and create meaningful solutions. Add to that our worldwide network of doers and experts, and you'll see that the opportunities to grow and build are limitless. We work as a team, collaborating with empathy to make really big things happen on a global scale. Because our solutions are everywhere, our impact is everywhere.

We are Cisco, and our power starts with you.

Message to applicants applying to work in the U.S. and/or Canada: The starting salary range posted for this position is $101,500.00 to $144,500.00 and reflects the projected salary range for new hires in this position in U.S. and/or Canada locations, not including incentive compensation*, equity, or benefits.

Individual pay is determined by the candidate's hiring location, market conditions, job-related skillset, experience, qualifications, education, certifications, and/or training. The full salary range for certain locations is listed below. For locations not listed below, the recruiter can share more details about compensation for the role in your location during the hiring process.

U.S. employees are offered benefits, subject to Cisco's plan eligibility rules, which include medical, dental and vision insurance, a 401(k) plan with a Cisco matching contribution, paid parental leave, short and long-term disability coverage, and basic life insurance. Please see the Cisco careers site to discover more benefits and perks. Employees may be eligible to receive grants of Cisco restricted stock units, which vest following continued employment with Cisco for defined periods of time.

U.S. employees are eligible for paid time away as described below, subject to Cisco's policies:

  • 10 paid holidays per full calendar year, plus 1 floating holiday for non-exempt employees

  • 1 paid day off for employee's birthday, paid year-end holiday shutdown, and 4 paid days off for personal wellness determined by Cisco

  • Non-exempt employees** receive 16 days of paid vacation time per full calendar year, accrued at rate of 4.92 hours per pay period for full-time employees

  • Exempt employees participate in Cisco's flexible vacation time off program, which has no defined limit on how much vacation time eligible employees may use (subject to availability and some business limitations)

  • 80 hours of sick time off provided on hire date and each January 1st thereafter, and up to 80 hours ofunused sick timecarried forwardfrom one calendar yearto the next

  • Additional paid time away may be requested to deal with critical or emergency issues for family members

  • Optional 10 paid days per full calendar year to volunteer

For non-sales roles, employees are also eligible to earn annual bonuses subject to Cisco's policies.

Employees on sales plans earn performance-based incentive pay on top of their base salary, which is split between quota and non-quota components, subject to the applicable Cisco plan. For quota-based incentive pay, Cisco typically pays as follows:

  • .75% of incentive target for each 1% of revenue attainment up to 50% of quota;

  • 1.5% of incentive target for each 1% of attainment between 50% and 75%;

  • 1% of incentive target for each 1% of attainment between 75% and 100%; and

  • Once performance exceeds 100% attainment, incentive rates are at or above 1% for each 1% of attainment with no cap on incentive compensation.

For non-quota-based sales performance elements such as strategic sales objectives, Cisco may pay 0% up to 125% of target. Cisco sales plans do not have a minimum threshold of performance for sales incentive compensation to be paid.

The applicable full salary ranges for this position, by specific state, are listed below:

New York City Metro Area:

$123,600.00 - $200,100.00

Non-Metro New York state & Washington state:

$109,900.00 - $181,600.00

* For quota-based sales roles on Cisco's sales plan, the ranges provided in this posting include base pay and sales target incentive compensation combined.

** Employees in Illinois, whether exempt or non-exempt, will participate in a unique time off program to meet local requirements.

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