Episode 13

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Published on:

16th Apr 2025

How do you navigate changes in senior leadership?

In this episode, Justus Killian, Seyka Mejeur, and Matt Gjertsen join the discussion on leadership transitions within venture-backed space startups. The conversation focuses on the implications of founder and CEO transitions, including the impact on company vision, culture, team morale, and operations. Drawing from personal experiences and industry examples, the guests explore common challenges such as employee uncertainty, the pace of cultural change, and the importance of clear, consistent communication. They also highlight opportunities for existing team members to step into leadership roles during periods of transformation. Practical advice is shared on managing change, honoring the legacy of founding leadership, and supporting the next generation of leaders to bridge organizational shifts.

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About the Podcast

A VC, a Headhunter, and a Trainer Walk into a Bar
VHTB is your guide to the talent, culture, and finance side of the space start-up ecosystem. Each episode, hosts Matt Gjertsen from Better Every Day Studios, Seyka & Brian Mejeur of AdAstra Talent Advisors, and Justus Kilian of Space Capital will share stories and insights from their experiences working with some of the most innovative companies on the planet.

About your hosts

Brian Mejeur

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Founder, CTO/COO, Advisor | Space, Clean Tech & Defense Talent Expert | Ex-SpaceX Engineer | Husband | Dad

Brian is one of the founders of AdAstra Talent Advisors where he functions as CTO and COO while partnering with leading early stage startups in Space, Defense, and Clean Tech.

Having spanned 7 years at SpaceX, a stint at an early stage startup, and holding BS & MS degrees in Aerospace Engineering, Brian’s experience in the trenches as an engineer and in operations allows him to relate first hand to the talent and hiring needs of AdAstra's clients.

Seyka Mejeur

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Founder, CEO, Advisor | Space, Clean Tech & Defense Talent Expert | Pilot | Wife | Mom
(titles not in order of importance)

Relentlessly resourceful and unusually optimistic, Seyka is deeply involved with world-changing startups. As a founder and CEO of AdAstra Talent Advisors, she builds thriving teams in NewSpace, Clean Tech, and Defense - empowering innovation that future generations depend on.

With a passion for relationships and a belief in the power of empowered teams, she helps visionary leaders turn bold ideas into reality.

Justus Kilian

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Justus is a Partner at Space Capital, a seed-stage venture firm investing in space-based infrastructure and their applications. Portfolio companies include SpaceX, Impulse Space, Varda, and Xona. He is active on multiple portfolio company boards and manages the firm’s recruiting platform, Space Talent. Before his current roles, Justus worked at Acumen, a $250M early-stage venture firm investing across East Africa and South Asia supporting over 50 companies through growth, turnaround, and exit.

Matthew Gjertsen

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Matt Gjertsen is the founder of Better Every Day Studios, a leadership development company that focuses on turning great engineers into great managers. Prior to starting his own company, Matt spent five years as the head of Training & Development at SpaceX, and 10 years training future military leaders as an Instructor Pilot in the U.S. Air Force. He and his team are on a mission to help train better managers that build better companies, to create a better world.