Charles D Schroth

Charles D Schroth, doing business as Southeast Aerial, a sole proprietorship based in Gustavus, Alaska, provides fixed-wing aircraft, pilot, and maintenance services exclusively to the Department of the Interior as a prime contractor, operating entirely under contract vehicles reserved for small businesses and competing in both Total Small Business set-asides and full-and-open deliveries. The vendor holds no subcontract footprint and represents a specialized regional operator whose federal work spans nearly a decade of continuous activity.

Southeast Aerial's customer base is entirely concentrated within Interior. The National Park Service Alaska Region accounts for 69 awards (99% of activity count) with $570 thousand combined potential value, while the Interior Business Center—Southeast Aerial's vehicle administrator—holds four awards worth $45.6 million in combined ceiling value, dominated by two large indefinite-delivery contracts. The U.S. Geological Survey Alaska Science Center (11 awards, $63 thousand) and the Office of Acquisitions and Grants (1 award, $10 thousand) complete the active roster. This concentration reflects the vendor's geographic and functional specialization: all work occurs in remote Alaskan environments supporting National Park Service resource management, USGS scientific research, and U.S. Fish and Wildlife Service operations.

The vendor's capability portfolio centers on on-call fixed-wing transportation supporting wildlife population monitoring, aerial surveys, infrastructure access and maintenance flights, personnel and equipment transport to isolated field sites, and stream gauge service operations. Recent representative work includes a $20.6 million multiple-award indefinite-delivery contract awarded April 1, 2026, by the Interior Business Center (completion March 31, 2031) under Total Small Business set-aside, an $18.6 million IDIQ awarded April 1, 2026, and a $500 thousand blanket purchase agreement established June 17, 2026, by the Interior Business Center for fixed-wing on-call transportation services in Alaska. Task orders under these vehicles and predecessor IDIQs have ranged from under $1 thousand to over $29 thousand per order, with individual deliveries supporting Glacier Bay trails flights, wildlife surveys, bear management operations, weather station maintenance, and archaeological documentation. The vendor held a predecessor $20 million multiple-award IDIQ from April 1, 2021, through March 31, 2026, which generated over 40 task orders during its term.

Parent vehicles anchor Southeast Aerial's prime footprint. The primary IDIQ (140D8121D0023) has generated 45 task orders worth $381 thousand in combined potential value. A predecessor vehicle (DOI Fixed Wing Flight Services—AK/HI 2017–2018) carried 32 task orders totaling $193 thousand. Together, these two vehicles account for the vast majority of the vendor's recurring order activity. The recent $500 thousand BPA and the new $18.6 million IDIQ represent fresh vehicle positions as of mid-2026.

Activity has remained consistent over the past five years—twelve awards in 2022, nine in 2023, ten in 2024, five in 2025, and seven through September 2026—with no pronounced growth trajectory but sustained engagement. The recompete horizon is minimal: only three awards (combined potential value $54 thousand) reach ultimate completion within the next twenty-four months, indicating limited near-term turnover risk against the large IDIQ ceilings. Combined potential value across all 87 awards is $66.2 million, though obligated spend stands at $633 thousand (1% of ceiling), reflecting the indefinite-delivery structure in which large contract ceilings support call-order activity.

Southeast Aerial's posture is primarily small-business set-aside. The new $18.6 million IDIQ carries Total Small Business designation, as do many recent task orders. However, the vendor also competes in full-and-open delivery orders under its existing IDIQs, indicating flexibility across both procurement categories. The vendor's NAICS coding is consistently 481211 (Nonscheduled Chartered Passenger Air Transportation), and all work requires FAA Part 121 or 135 certification. Federal registration began in September 2016, establishing a decade of continuous Interior contracting history with no subcontract relationships or prime-contractor roles on multi-vendor efforts.