Final answer:
Candidates designated as Selection Board Eligible for senior executive service positions in the federal government must demonstrate executive core qualifications, which include leadership, results-driven skills, business acumen, and coalition-building abilities.
Step-by-step explanation:
The term E8-9 candidates likely refers to senior non-commissioned officer ranks in the military, though it is not explicitly mentioned in the context provided. However, when speaking about Selection Board Eligible (SBE) concerning federal government positions, it usually relates to the senior executive service. To be designated as SBE, candidates must typically demonstrate executive core qualifications (ECQs).
These ECQs include leading change, being results-driven, demonstrating business acumen, and building coalitions. These criteria are used to evaluate potential leaders and are crucial for advancing to higher-level positions within the federal government.