Senior Philanthropy Officer

ClientEarth; Greater London; Hybrid; GBP 45,000 - 70,000; Full time

Benefits offered by this job

Flexible working

EDI & diversity

Job summary

ClientEarth’s Philanthropy Team is seeking a motivated fundraiser to manage donor relationships, develop new funding prospects, and craft compelling donor communications across multiple countries.

You will work closely with major donors, trusts, and foundations, contribute to strategy, and help drive renewals and uplifts while staying aligned with brand guidelines.

Qualifications

• Experience in donor stewardship with proven five- or six-figure gifts.
• Experience identifying and cultivating prospects.
• Ability to write compelling donor communications, reports, and proposals.
• Experience raising funds from donors in different geographies.

Responsibilities

• Actively manage donor relationships within an assigned portfolio, renewals and uplifts.
• Develop the pipeline of new donors through prospect research and events.
• Write and develop public-facing donor communications materials in line with brand guidelines.
• Keep up to date with fundraising trends and share knowledge across the team.

Skills

Donor stewardship

Prospect research

Communications writing

Donor fundraising across geographies

Job description

Join ClientEarth's talented, collaborative Philanthropy Team and help drive transformative environmental change, working closely with major donors, trusts, and foundations across multiple countries. Important dates to note:

• Deadline to submit an initial application: 23 November 2026
• If your profile passes initial screening, you will be asked to submit additional information in the form of three additional questions.
• The deadline to submit your answers/additional information is 26 November 2026
• If we do not receive a response to these questions by the deadline we will assume you are no longer interested in the role.
• Interviews will take place on 4 December 2026

Please also review the "Our Hiring Process" section at the bottom of this advert to learn more about the stages involved for this specific 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 | 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.