At Vicillion, Wanjiku holds the dual role of CEO and Chairwoman. She acts as a project manager, leads strategic direction, oversees operations, and fosters a culture of innovation and ingenuity. Under her leadership, the company has consistently grown, embracing change, and leveraging technology for efficient operations. Her mission through Vicillion is to enhance human ingenuity in technology, make history, and make a positive, unforgettable impact.

Wanjiku coordinates and manages a completions certification group by streamlining processes (planning, coordination, performance of design, analysis, and liaison engineering) and working on Federal Aviation Administration (FAA) approvals for aircraft delivery. She demonstrates continuous teamwork by working with outfitting organizations such as electrical, mechanical, operations, structures, quality, and other certification teams as required.

Wanjiku demonstrated her leadership and conflict management capabilities as a Senior Resident Advisor. Here, she provided support to other Resident Advisors in areas of programming, community development, and overall leadership development. She served as a role model and leader among Resident Advisors and her residents by demonstrating initiative, character, and commitment. Her knack for conflict management was honed during this time, resolving issues among residents, and even participating in the interviewing process for new applicants for the Resident Advisor position.

As a co-founder and treasurer, she had the opportunity to shape the society's direction from the ground up, building up the foundation. She was responsible for financial planning and oversight, and under her fiscal stewardship, the society managed its funds effectively to support various initiatives.