Our Foundation
The Firm Built for Challenge
A governance firm that stress-tests the frameworks others accept at face value. Strategic Governance as a Service, principal-led and adversarial by design.
Our Philosophy
Marentis Labs exists to close a gap the governance industry has spent two decades widening. Organisations have never spent more on governance, yet severe failures continue at the same rate. Our white paper sets out the full evidence and traces the pattern to its source. The conclusion holds across sectors, jurisdictions, and regulatory regimes. Governance fails because the assumptions beneath the strategy go unchallenged until the consequences arrive.
The research identifies three structural defects in how boards are governed. Oversight arrives episodically, in scheduled meetings that miss the moments where strategy actually turns. Decision-making rewards consensus, which quietly suppresses the dissent a board most needs to hear. And challenge survives only where an individual chooses courage, because the system itself requires it of no one. Marentis Labs corrects all three. We install challenge as a permanent function, active between board cycles and built to surface what consensus conceals.
This is Strategic Governance as a Service. We act as a continuous, adversarial challenge function for the board, stress-testing every framework, examining every assumption, and pressure-testing every control before a regulator, an acquirer, or a crisis does it first. A board that has been genuinely challenged is a board far harder to surprise, to deceive, and to catch unprepared.
Principal-Led Delivery
The team that pitches is the team that delivers. Direct, undiluted access to senior expertise, with no handoff to junior consultants.
No Overhead. All Expertise.
A lean structure means client fees fund expertise directly. No associates. No project teams. No overhead layer between the client and the principal.
Marentis Labs Research
The Architecture of Governance Failure
Ninety pages of practitioner research on why governance spending keeps rising while failures persist, and the structural response that closes the gap.
The Founder
Owen Vallis
Managing Director & Founder
Marentis Labs Ltd
Strategic Risk Executive
Financial Services Group Chief Risk Officer & Independent Non-Executive Director
Owen Vallis brings two decades of senior institutional governance and strategic risk management to the work of stress-testing corporate strategy and investment decisions. He built that perspective at the centre of Tier 1 global finance, across Credit Suisse, J.P. Morgan, and Morgan Stanley. As the first Group Chief Risk Officer for SICO Bank, he built the holistic risk management function from inception and reported directly to the Board.
Direct board experience sharpens that institutional depth. Owen has served as a Non-Executive Director on the Audit and Risk Committee of a government statutory body reporting to Parliament, and as Chairman of Active Prospects, where revenue tripled during his tenure.
Owen has sat on both sides of the boardroom table, accountable to a board as a senior executive and providing oversight as a non-executive director. That dual vantage gives him the instinct to locate the flawed assumptions and hidden vulnerabilities that quietly undermine performance.
Or read the FAQ for background on the firm and how engagements work.
Career & Board Experience






Owen Vallis · Founder & Principal
Executive Career
SICO Bank
Group Chief Risk Officer
First Group CRO across a $6bn AUM institution spanning three jurisdictions. Led Risk Framework overhaul, regulatory capital strategy, and board-level risk governance from inception.
Credit Suisse
Head of Fiduciary Risk, UK
Governance and risk oversight of £50bn+ AUM across equities, fixed income, multi-asset, CLO funds, Infrastructure funds and real estate. Regulatory engagement on fund governance, capital management strategies and fiduciary risk requirements.
JP Morgan
Vice President, Asset Management Risk Management
Risk architecture for a $245bn institutional client platform migration. Institutional clients across all asset classes. Delivered without material client loss or regulatory incident.
Morgan Stanley
Advisory Role
Early-career experience in advisory roles across risk and governance, establishing patterns of regulatory engagement and complex institutional problem-solving.
Board & Governance Experience
Active Prospects
Chairman
Chaired the board through a 3.4x revenue turnaround over five years, from £6.5m to £22m+. Restructured the committee architecture, professionalised board governance, and established oversight practice now ranked among the sector's top tier. Number 8 in the Great Place to Work 2026 rankings for large organisations (greatplacetowork.co.uk)
Children's Commissioner
Non-Executive Advisor, Audit & Risk Committee
Served 2016–2020 as NED on the Audit and Risk Committee of a statutory body reporting to Parliament. Governance guidance on audit, risk, internal controls, and parliamentary oversight expectations.
EdAct Trust
Non-Executive Director - Trust Member
Governance and strategic guidance across an educational trust managing multiple school settings.
Regulatory Experience
FCA
Financial Conduct Authority
PRA
Prudential Regulation Authority
NAO
National Audit Office
CBB
Central Bank of Bahrain
FINMA
Swiss Financial Market Supervisory Authority
CSSF
Commission de Surveillance du Secteur Financier, Luxembourg
CMA
Competition & Markets Authority, Saudi Arabia
SCA
Securities & Commodities Authority, United Arab Emirates
BaFIN
Federal Financial Supervisory Authority, Germany
Company Registration
Registered Address: 167–169 Great Portland Street, 5th Floor, London, W1W 5PF | United Kingdom Company Number: 16600357 |