Process Engineer - Water

Arup is a unique organization that is owned and run by its employees, which means that our people are at the heart of everything we do. As a people‑centric organization, we are committed to creating an inclusive and supportive work environment where everyone can thrive and achieve their full potential. Our employees are empowered to make decisions and take ownership of their work, which fosters a culture of innovation and collaboration. At Arup, we value diversity and strive to create a workplace that reflects the communities we serve. As a result, we are able to attract and retain some of the brightest and most talented professionals in the industry. Primary Focus The primary focus of the Process Engineer role is to support and, where appropriate, lead process engineering activities for water, wastewater, energy, and waste projects across the planning, feasibility, design, and delivery stages. The role will contribute to the development of process designs, technical analyses, and engineering documentation, while working collaboratively with multidisciplinary teams. The Process Engineer will also provide technical support to the Design Manager or Project Manager on larger water infrastructure projects and coordinate with project teams across different locations as required. Responsibilities Prepare process calculations, mass balances, hydraulic profiles, and process flow diagrams (PFDs). Size and evaluate water and wastewater treatment units (e.g., sedimentation, filtration, biological reactors, disinfection, sludge processes). Develop design criteria, technical notes, and process inputs to multidisciplinary design packages. Review drawings, specifications, and vendor data relevant to process engineering. Build and run treatment process models using tools such as GPS‑X, BioWin, or equivalent software. Analyse model outputs and provide recommendations for design optimization and process performance improvements. Conduct site visits and plant assessments to verify existing conditions and gather operational data. Analyse plant data to identify performance gaps, hydraulic limitations, and opportunities for process improvement. Produce high‑quality engineering deliverables in accordance with internal standards, client requirements, and regulatory guidelines. Communicate technical concepts effectively with internal teams, clients, and external partners. Participate in client meetings, workshops, and design reviews as needed. Contribute to internal knowledge‑sharing, process standards, and continuous improvement initiatives. Qualifications Bachelor’s degree in Chemical, Sanitary, Process Engineering or related field. Licensed Engineer in the Philippines. 3‑7 years of professional experience in water and wastewater treatment design, process engineering or related sectors. Experience preparing process calculations, developing process flow diagrams (PFDs), and supporting the sizing of treatment process units. Exposure to feasibility studies, conceptual and detailed design stages, and preparation of engineering deliverables. Good understanding of physical‑chemical and biological treatment processes used in municipal and/or industrial water/wastewater systems. Familiarity with local and international standards (e.g., DENR, PNSDW, USEPA, AWWA, WEF, ISO, WHO guidelines). Strong verbal and written communication skills, capable of presenting technical information clearly. Solid technical writing skills for reports, calculations and design documentation. What We Offer You At Arup, we care about each member’s success, so we can grow together. Guided by our values, we provide an attractive total rewards package that recognises the contribution of each of our members to our shared success. As well as competitive, fair and equitable pay, we offer a career in which all of our members can belong, grow and thrive – through benefits that support health and wellbeing, a wide range of learning opportunities and many possibilities to have an impact through the work they do. Profit Share is a key part of our reward, enabling members to share in the results of our collective efforts. We offer a competitive remuneration package commensurate with qualifications and experience to the right candidate including HMO, Group Life and Accident Insurance, medical reimbursement, government standard benefits, 15 days VL and SL, hybrid work arrangement and long‑term career development opportunities. Different People, Shared Values Arup is an equal opportunity employer that actively promotes and nurtures a diverse and inclusive workforce. We welcome applications from individuals of all backgrounds, gender identity or expression, marital status, disability, neurotype or mental health, race or ethnicity, faith or belief, sexual orientation, socioeconomic background, and whether you’re pregnant or on family leave. We are an open environment that embraces diverse experiences, perspectives, and ideas – this drives our excellence. Guided by our values and alignment with the UN Sustainable Development Goals, we create and contribute to equitable spaces and systems, while cultivating a sense of belonging for all. Our internal employee networks support our inclusive culture: from race, ethnicity and cross‑cultural working to gender equity and LGBTQ+ and disability inclusion – we aim to create a space for you to express yourself and make a positive difference. Discover more about life at Arup at We are committed to making our recruitment process and workplaces accessible to all candidates. Please contact Psalm Manuel at View email address on click.appcast.io to let us know if you need any assistance or reasonable adjustments throughout your application or interview process, and/or to perform the essential functions of the role. We will do everything we can to support you. Personal data provided by job applicants will be used strictly in accordance with the employer’s personal data policies, a copy of which is available on Arup’s Legal page. #J-18808-Ljbffr