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Fidelis Security
Fidelis Security, backed by Partner One, provides proactive cyber defense for enterprise and government clients, detecting post-breach threats 9x faster.
Fidelis Security
Fidelis Security is a cybersecurity company headquartered in Riverside, CA, providing proactive defense solutions to enterprise and government organizations. It is backed by Partner One, described as one of the fastest-growing software conglomerates globally. The company markets itself as a trusted leader protecting sensitive data for over 20 years. The firm delivers a range of cybersecurity capabilities, including unified visibility, automation, and deep threat intelligence. It focuses on detecting post-breach attacks, claiming a 9x faster response time. Fidelis serves enterprise and federal clients, and its platform includes cloud-scale security and compliance features. The company has received recognition, such as a Gold cybersecurity award from Merit Awards (per the firm's website, May 2026). Leadership roles are held by Ivan Dolensky (VP, International Sales) and Jennifer Welesko (CFO). The firm's team size is not publicly disclosed. Fidelis is privately held and owned by Partner One, which provides capital and operational support. No additional offices, philanthropic entities, or investment vehicles have been identified. Fidelis Security's primary structural differentiator is its ownership by Partner One, a software conglomerate, rather than being a standalone cybersecurity firm or a family office. This backing likely influences its strategic direction and growth, but the firm operates as a commercial security vendor, not as an investment or advisory entity.
General information
Firm type
other
Year founded
—
AUM
Undisclosed
Location
Region
North America
Country
United States
City
Riverside
Corporate office
Riverside, CA, United States
Principals
Ivan Dolensky
Vice President, International Sales
Jennifer Welesko
Chief Finance Officer
Sector focus
Frequently asked questions
Who makes investment decisions at Fidelis Security?
Fidelis Security is a cybersecurity company, not an investment firm. Its leadership includes Ivan Dolensky (VP, International Sales) and Jennifer Welesko (CFO). Strategic decisions are likely guided by its parent company, Partner One, a software conglomerate.
What sectors does Fidelis Security serve?
Fidelis Security focuses on the cybersecurity sector, specifically proactive defense for enterprise and federal government clients. Its technology emphasizes threat detection, unified visibility, and automation to protect sensitive data.
How is Fidelis Security related to Partner One?
Fidelis Security is backed by Partner One, described as one of the fastest-growing software conglomerates. This ownership provides capital and operational support, distinguishing Fidelis as a portfolio company rather than an independent entity.
Does Fidelis Security manage any investment vehicles?
No. Fidelis Security is purely a cybersecurity company that sells software and services. It does not operate investment funds, family offices, or asset management vehicles.
What is the known geographic footprint of Fidelis Security?
Fidelis Security is headquartered in Riverside, California, and serves enterprise and federal clients. The firm has disclosed no additional office locations or specific international presence on its public website.
Does Fidelis Security have any philanthropic structures?
Fidelis Security's public materials do not mention any philanthropic foundation, charitable arm, or separate social impact entity. The company focuses solely on cybersecurity.
What is Fidelis Security's known posture on rival cybersecurity firms?
Fidelis Security positions itself as a proactive defense provider, claiming detection of post-breach attacks over 9x faster. It competes with other cybersecurity vendors, though specific competitor names are not disclosed in public materials.
Profile maintained by Altss using OSINT (open-source intelligence), regulatory filings, licensed data partners, and verified direct submissions. Read the methodology. Last updated: . Continuous refresh with full update cycles at least every 30 days.
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