The Supreme Secondary Learner Government (SSLG) is the highest and most recognized student governing body in all secondary schools under the Department of Education. It serves as the official voice of the student population, ensuring that their concerns, rights, and welfare are represented. The SSLG organizes programs and activities that promote discipline, service, leadership, and active participation in school and community affairs. Through this organization, students learn democratic leadership, accountability, and civic engagement. Members are trained to become role models who advocate for positive change and serve as bridges between learners, teachers, and administrators.

The Peer C.A.R.E.S Club (Counseling, Advocacy, Reflection, Empowerment, and Support) is a student-led group that promotes mental health, wellness, and peer support within ERCIHS. It provides a safe space where learners can share their thoughts and feelings, while also engaging in activities such as counseling support, advocacy campaigns, empowerment workshops, and peer mentoring. The club helps students build empathy, resilience, and a sense of belonging, reminding them that they are never alone.

The Congressionalist/ Ang Kongresyunalyan are the official campus publications of ERCIHS, serving as vital platforms for student journalism and create expression. These organizations provide aspiring writers, editors, and photojournalists with opportunities to develop skills in news writing, editorial work, feature writing, photojournalism, and layout design, while also nurturing creativity through literary works such as poems, essays, and short stories. Beyond reporting school events, the publications serve as the students' collective voice, raising awareness on relevant issues and promoting truth, integrity, and social responsibility. By publishing in both English and Filipino, the organization strengthens communication skills, fosters appreciation for culture and identity, and inspires learners to use their talents in service of the school and community.

Barkada Kontra Droga (BKD) aims to empower youth through education, training, and comunity involvement, promoting resilience, integrity, and responsible choices to prevent drug use. Guided by faith and compassion, BKD advocates for strong support networks and peer involvement to inspire a positive, drug-free lifestyle. By developing young leaders and upholding human dignity, the organization envisions a faith-guided community where strudents are empowered to live healthy lives and become advocates for a drug-free future.

The Red Cross youth advocates for humanitarian service, health promotion, and youth involvement. Within schools, this advocacy is carried out through programs that teach the importance of saving lives, disaster risk reduction, and fostering empathy for others. The Red Cross Youth, which operates under DepEd partnership, empowers students to volunteer, lead community projects, and participate in activities that promote first aid, safety awareness, and social responsibility. This aligns with DepEd's mission to provide holistic education that integrates values formation and community service.

The Girl Scouts of the Philippines advocates for leadership development, values education, community involvement, gender equality, and environmental stewardship. Within schools, this advocacy is carried out through programs that nurture confidence, responsibility, and service among girls and young women. The Girl Scouts of the Philippines, in partnership with DepEd, empowers students to participate in activities that build character, promote discipline, and inspire them to become active citizens who contribute to nation-building. This aligns with DepEd’s mission to provide holistic education that integrates values formation, leadership, and social responsibility.

They provide services like leadership training camps and workshops that develop teamwork and decision-making skills, school and community programs that strengthen discipline and civic duty, outreach projects that focus on disaster preparedness, and environmental activities that promote care for nature and sustainability.

The Manawari Madrigal Ensemble is the official choir organization of ERCIHS, uniting student voices in pursuit of choral excellence. More than just a group of singers, it is a family bound by passion, dedication, and the joy of performing choral music together. Through every note, they aim to inspire, uplift, and bring people closer through the universal language of music. 

MME cultivates the love and appreciation for choral music among students while representing ERCIHS with pride in school events and community gatherings. It aims to build teamwork and friendship through shared musical experiences, fostering a sense of unity and belonging. Moreover, the club seeks to inspire hope and positivity by using music as a platform for expression, entertainment, and meaningful connection with others. 

The Hinirang Dance Company is the official dance organization of ERCIHS, showcasing artistry, passion, and talent through movement. Unlike other groups that focus on only one style, Hinirang values versatility—performing cultural dances, hip hop, dance sport, and more. Guided by creativity and teamwork, they aim to celebrate achievements, inspire audiences, and expand the possibilities of dances. 

They demonstrate  the diversity of dance by performing across different genres and styles while preserving and promoting cultural heritage. The club provides students with a creative outlet for self-expression, allowing them to grow not only as dancers but also as individuals. Through performances and competitions, members build confidence and stage presence, gaining valuable experience both on and off stage. All in all, the club strives to strengthen unity and school pride by fostering teamwork and collaboration in dance.

The Campus Champs Sports Club of ERCIHS is a student organization that provides a venue for learners to participate in organized sports and physical activities. It promotes fitness, develops skills in various athletic events, and prepares students for both school-based and interschool competitions.

The club supports the school’s intramural games, assists in athletic programs, and conducts training sessions to strengthen student participation in sports. It also encourages teamwork, discipline, and responsibility through structured activities.

By integrating athletics with school life, the Campus Champs Sports Club contributes to the balanced growth of students and supports ERCIHS in its goal of developing individuals who are prepared to serve both the school and the wider community.

Siklab-Bert is the official Citizenship Advancement Training (CAT) organization of ERCIHS. It provides students with structured instruction and practical activities designed to promote discipline, leadership, and civic responsibility. Through drills, exercises, and community-based initiatives, Siklab-Bert develops students’ awareness of their role in nation-building and public service.

The organization trains learners to apply values of order, cooperation, and accountability in both school and community settings. It also supports school programs that require organized student participation, such as flag ceremonies, campus security assistance, and disaster preparedness activities.

By integrating leadership training with civic engagement, Siklab-Bert helps ERCIHS fulfill its mandate of producing responsible, service-oriented, and community-minded individuals.