Chief of Staff

Sitemark

Chief of Staff at Sitemark leading operational projects across departments in a fast-scaling renewable energy company. Collaborating closely with leadership on strategic growth initiatives.

Posted 6/12/2026full-timeLeuven • 🇧🇪 BelgiumLeadWebsite

Tech Stack

Tools & technologies

About the role

Key responsibilities & impact

Own end-to-end the high-value, cross-departmental projects the leadership team cares about most — from messy problem to shipped outcome.
Build the operational backbone of a company tripling in size: spot what's starting to break as we grow and put in the systems and ways of working that fix it.
Keep the company on track: help run planning, set and track the goals and KPIs that matter, and pull together the analysis behind leadership meetings, all-hands, and board updates.
Act as a trusted advisor and sounding board to the leadership team — pressure-testing decisions, surfacing what they're missing, and turning ambiguity into a clear plan.
Drive alignment across teams: connect leadership's priorities to what each department is actually doing, kill low-value work, and unblock the projects that matter.
Go deep fast on unfamiliar problems — why a key metric is dropping, whether to build or buy a new tool, how to fix a process that's breaking as we grow.

Requirements

What you’ll need

3–5 years in management consulting, investment banking, a high-growth startup, or a similarly demanding environment where you owned hard problems end-to-end.
A track record of structuring ambiguous problems and driving them to a result without a playbook or a team handed to you.
Exceptional communication — you can write a crisp memo, run a leadership meeting, and hold your own with the leadership team and founders.
Comfort operating across finance, ops, people, and strategy without being a deep specialist in any one of them.
Genuinely high standards and high ownership — you'd rather do it excellently and lean than adequately and bloated.
This is not a nine-to-five. It's hard, it's tough problems, and it'll push you well outside your comfort zone repeatedly. You should want that.
Nice to have: exposure to international expansion and scaling operations at a high-growth company past 50 people.

Benefits

Comp & perks

A rare chance to work directly with leadership and founders of a fast-scaling company
Get involved in projects across the entire company, and build the systems that carry us from 60 to 200 people.
Collaborate with a high-energy team that is obsessed with excellence and execution.
Work on a mission that matters: accelerating the world's transition to renewable energy.
Competitive compensation including meaningful equity (stock options) with real upside.

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

management consultinginvestment bankingproblem structuringKPI trackingdata analysisproject managementoperational systemsprocess improvementstrategic planningcross-departmental collaboration

Soft Skills

exceptional communicationleadershipproblem-solvingadaptabilityhigh ownershipattention to detailcritical thinkingteam alignmenttrustworthinessdecision-making