Senior Philanthropy Officer

ClientEarth; Elsene; On-site; EUR 40,000 - 48,000; Full time

Benefits offered by this job

Flexible working

Flexa accredited Employer

Job summary

ClientEarth is seeking a Senior Philanthropy Officer to nurture donor relationships, build new funding pipelines, and craft donor communications across several countries. The role sits in External Affairs and reports to Aisling Foster, with a Brussels-location focus and a permanent full-time contract.

Flexible working arrangements and strong collaboration with the Development team are emphasized. The role involves managing major donor relationships, researching prospects, and coordinating with

Qualifications

• Proven donor stewardship experience with five or six figure gifts.
• Experience identifying, cultivating and soliciting prospects.
• Ability to write compelling fundraising communications materials.
• Experience raising funds from donors in different geographies.

Responsibilities

• Actively manage donor relationships across an assigned portfolio, providing stewardship and reporting to secure renewals and uplifts.
• Develop the pipeline of new donors through prospect research, network mapping, and external events.
• Write and develop public-facing donor communications in coordination with the team and programme staff.
• Keep up to date with fundraising trends and support knowledge sharing within the Philanthropy team.

Skills

Donor stewardship

Prospect research

Fundraising communications

Donor relations across geographies

Job description

Senior Philanthropy Officer

Application Deadline: 23 November 2026

Department: External Affairs

Employment Type: Permanent - Full Time

Location: Brussels

Reporting To: Aisling Foster

Compensation: €3,958.13 / month

Description

This role offers the chance to join a high‑performant, deeply collaborative Philanthropy Team within ClientEarth’s Development Department, working closely with major donors, trusts, and foundations across multiple countries.

Important dates to note

• Deadline to submit an initial application: 23 November 2026
• The deadline to submit your answers/additional information is 26 November 2026
• Interviews will take place on 4 December 2026

See the job description for a full list of duties for this role.

Key Responsibilities

• Actively manage donor relationships across an assigned portfolio of supporters, within agreed strategy and targets, providing first-class stewardship and reporting to secure renewals and uplifts.
• Develop the pipeline of new donors through effective prospect research, network mapping and connecting with new contacts at external and internal events as a representative of ClientEarth.
• Write and develop public-facing communications materials for donors, consistent with brand guidelines, in coordination with the communications team and programme staff as appropriate.
• Keep up to date with fundraising trends and ensure these are worked into internal activities and planning. Facilitate knowledge sharing within the Philanthropy team and across the Development department.

See the job description for a full list of duties for this role.

Skills, Knowledge & Expertise

• Experience of providing best practice donor stewardship and relationship development with demonstrable evidence of securing or managing five and six figure gifts
• Experience of identifying, cultivating and soliciting prospects
• Ability to write compelling communications materials including fundraising campaigns, donor reports, and proposals
• Experience of raising funds from donors in different geographies

See the job description for a full list of duties for this role.

Job Benefits

Flexible working: We are proud to be a Flexa accredited Employer. Visit our Flexa Employer page for more information on our approach to flexible working. Our flexible working policy allows our people the choice to decide to work from home/another location in the country where their contract of employment is issued for 80% of their month, with the other 20% of their month being office-based. See our benefits page for more: Benefits | ClientEarth Careers as well as our flexible working FAQ.

ClientEarth values diversity and inclusion and the benefits this brings. We aim to appoint the most suitable candidate at all times and welcome applications from people from all different backgrounds. See our Equity, Diversity and Inclusion (EDI) at ClientEarth journey page for more. Please note that ClientEarth is only able to employ those who have the pre-existing legal right to work in the UK or Belgium.

ClientEarth is not a law firm and does not provide legal advice or legal services to third parties.