About
Entrepreneur focused on U.S. national security who co-launched Riphean Investments with Joel and guides its business strategy. He previously served as CEO of cybersecurity firm GRIMM, founded DeMuth Holdings, and co-founded the Cyber Bytes Foundation nonprofit, with extensive experience in DoD cyber, SIGINT, and intelligence programs.
Contact· self-published, not guessed
Invests in
CybersecurityDefense Tech
Experience
- RapidAscentCo-Founder & Chief Executive Officercurrent2023 — presentFredericksburg, Virginia, United States
- RapidAscentCo-Founder & Chief Growth Officer2020 — 2023Fredericksburg, Virginia, United States
- Riphean InvestmentsPartner / Co-founder / General Partnercurrent2021 — presentFredericksburg, Virginia, United States
- Immortal Cyber IncFoundercurrent2022 — presentWashington DC-Baltimore Area
- Cyber Bytes FoundationCo-Founder / President / Advisorcurrent2025 — presentStafford, Virginia, United States
- Immortal Group (DeMuth Holdings)Managing Partnercurrent2017 — present
- Election Integrity FoundationMember Board of Directorscurrent2023 — presentWashington DC-Baltimore Area
- Cyber Bytes FoundationCo-Founder & Advisor2021 — 2025Stafford, Virginia, United States
- Cyber Bytes FoundationCo-Founder & President, Board Of Directors2019 — 2021Qauntico, VA
- Cyber Bytes FoundationCo-Founder & Member Board Of Directors2018 — 2019Stafford, Virginia, United States
- GRIMM (SMFS, Inc.)Chief Executive Officer2017 — 2020Washington D.C. Metro Area
- The Applied Research & Education InstituteAdvisory Board Member2012 — 2018
- ManTech InternationalExecutive Director, Cyber Range Services2015 — 2017
- ManTech InternationalDirector, Cyber Security Program Operations2010 — 2015
- ZanttZCo-founder & Advisor2010 — 2012
- MTCSC, Inc.Director, Information Security and Assurance Division2009 — 2010
- MTCSC, Inc.Manager, Information Technology Division2004 — 2009
- MTCSC, IncSystems Engineer / Technical SME2001 — 2004
- Full Contact Information SolutionsNetwork Engineer1998 — 2001
Skills & more
LeadershipEducational TechnologyServers26Active Directory10Operating Systems6Visio7VMware8Linux7SharePoint11Venture Capital4National Security4Private Equity4
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Management ConsultingCapability ManagementVulnerability ResearchBusiness StrategyTechnical LeadershipBoard DevelopmentBusiness Growth StrategiesCyber SecuritySecurityGovernment ContractingInformation SecurityNetworking- MCP — Microsoft
- Network + — CompTIA
- Certified Information Systems Security Professional (CISSP) — ISC2
- Certified ScrumMaster (CSM) — Scrum Alliance
From Brian's professional profile.
Colleagues at Riphean Investments
Andrew Forysiak
Owner, AJF and Associates at Riphean Investments
Autumn Noltee
Senior Controller at Riphean Investments
Brittany Chiang
Chief Executive Officer, Flatter, Inc. at Riphean Investments
Brittany Fowler
Executive Assistant at Riphean Investments
Curry Roberts
President, Fredericksburg Regional Alliance at Riphean Investments
Damon Phillips
Senior Vice President of Business Development and Alliances at Riphean Investments
Dan Singh
Investor at Riphean Investments
David Stallard
Investor at Riphean Investments
Frequently asked questions
- Who is Brian DeMuth?
- Entrepreneur focused on U.S. national security who co-launched Riphean Investments with Joel and guides its business strategy. He previously served as CEO of cybersecurity firm GRIMM, founded DeMuth Holdings, and co-founded the Cyber Bytes Foundation nonprofit, with extensive experience in DoD cyber, SIGINT, and intelligence programs.
- Where does Brian DeMuth work?
- Brian DeMuth is Partner at Riphean Investments.
- What does Brian DeMuth invest in?
- Brian DeMuth invests in Cybersecurity, Defense Tech.
- Where did Brian DeMuth go to school?
- Brian DeMuth studied at Strayer University (Bachelor of Science, Information Systems); Northern Virginia Community College (Information Technology Network Engineering, Network Engineering); Northern Virginia Community College (Information Technology Network Administration, Network Administration).
Founder mafias
Northern Virginia Community College mafia2
Also came through, then founded or led a company.
Strayer University mafia2
Also came through, then founded or led a company.
Same school
Also attended Strayer University4
Also attended Northern Virginia Community College7
Joey ShinInvestment Analyst at Pantera CapitalKyle GriswoldPartner at FTV CapitalMariana MusiienkoAccounting Manager at NaviMed CapitalJessicaHead of Business Development at Dwight FundingBeatrice LaureanoExecutive Assistant to the Managing Director and Leader of Nature Solutions & Nature Team Associate at Bezos Earth FundMindy StovallSenior Executive Assistant at OUTPOST VENTURES
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